./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 233676c1e8a1b5798ecf495818fb18bbff45b7aea47a9aff904b2f64a9e366a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:04:28,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:04:28,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:04:28,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:04:28,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:04:28,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:04:28,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:04:28,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:04:28,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:04:28,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:04:28,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:04:28,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:04:28,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:04:28,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:04:28,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:04:28,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:04:28,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:04:28,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:04:28,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:04:28,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:04:28,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:04:28,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:04:28,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:04:28,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:04:28,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:04:28,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:04:28,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:04:28,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:04:28,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:04:28,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:04:28,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:04:28,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:04:28,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:04:28,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:04:28,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:04:28,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:04:28,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:04:28,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:04:28,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:04:28,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:04:28,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:04:28,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:04:28,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:04:28,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:04:28,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:04:28,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:04:28,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:04:28,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:04:28,945 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:04:28,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:04:28,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:04:28,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:04:28,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:04:28,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:04:28,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:04:28,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:04:28,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:04:28,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:04:28,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:04:28,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:04:28,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:04:28,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:04:28,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:04:28,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:04:28,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:04:28,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:04:28,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:04:28,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:04:28,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:04:28,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:04:28,951 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:04:28,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:04:28,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:04:28,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:04:28,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 233676c1e8a1b5798ecf495818fb18bbff45b7aea47a9aff904b2f64a9e366a2 [2021-11-02 23:04:29,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:04:29,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:04:29,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:04:29,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:04:29,304 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:04:29,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-02 23:04:29,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/data/7a7e3db05/9ae18abffb484112880c2fd9f156c058/FLAG644afcfe2 [2021-11-02 23:04:29,951 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:04:29,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-02 23:04:29,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/data/7a7e3db05/9ae18abffb484112880c2fd9f156c058/FLAG644afcfe2 [2021-11-02 23:04:30,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/data/7a7e3db05/9ae18abffb484112880c2fd9f156c058 [2021-11-02 23:04:30,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:04:30,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:04:30,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:04:30,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:04:30,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:04:30,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:30,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77006b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30, skipping insertion in model container [2021-11-02 23:04:30,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:30,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:04:30,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:04:30,700 WARN L228 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_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2021-11-02 23:04:30,736 WARN L228 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_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2021-11-02 23:04:30,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:04:30,771 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:04:30,872 WARN L228 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_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2021-11-02 23:04:30,893 WARN L228 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_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2021-11-02 23:04:30,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:04:30,932 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:04:30,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30 WrapperNode [2021-11-02 23:04:30,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:04:30,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:04:30,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:04:30,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:04:30,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:30,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:04:31,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:04:31,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:04:31,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:04:31,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:04:31,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:04:31,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:04:31,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:04:31,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (1/1) ... [2021-11-02 23:04:31,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:04:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:31,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:04:31,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:04:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:04:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:04:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:04:31,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:04:31,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:04:31,881 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 23:04:31,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:04:31 BoogieIcfgContainer [2021-11-02 23:04:31,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:04:31,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:04:31,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:04:31,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:04:31,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:04:30" (1/3) ... [2021-11-02 23:04:31,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df780c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:04:31, skipping insertion in model container [2021-11-02 23:04:31,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:04:30" (2/3) ... [2021-11-02 23:04:31,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df780c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:04:31, skipping insertion in model container [2021-11-02 23:04:31,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:04:31" (3/3) ... [2021-11-02 23:04:31,894 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-02 23:04:31,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:04:31,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 23:04:31,955 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:04:31,962 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=PETRI_NET, 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 [2021-11-02 23:04:31,962 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 23:04:31,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:04:31,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:31,989 INFO L513 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] [2021-11-02 23:04:31,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1096512752, now seen corresponding path program 1 times [2021-11-02 23:04:32,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:32,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140097519] [2021-11-02 23:04:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:32,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:32,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:32,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140097519] [2021-11-02 23:04:32,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140097519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:32,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:32,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:04:32,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401128034] [2021-11-02 23:04:32,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:04:32,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:32,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:04:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:04:32,384 INFO L87 Difference]: Start difference. First operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:32,530 INFO L93 Difference]: Finished difference Result 206 states and 333 transitions. [2021-11-02 23:04:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:04:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 23:04:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:32,546 INFO L225 Difference]: With dead ends: 206 [2021-11-02 23:04:32,546 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:04:32,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:04:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:04:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-11-02 23:04:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 1.4333333333333333) internal successors, (215), 151 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 215 transitions. [2021-11-02 23:04:32,634 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 215 transitions. Word has length 47 [2021-11-02 23:04:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:32,635 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 215 transitions. [2021-11-02 23:04:32,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 215 transitions. [2021-11-02 23:04:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:04:32,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:32,639 INFO L513 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] [2021-11-02 23:04:32,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:04:32,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 191283016, now seen corresponding path program 1 times [2021-11-02 23:04:32,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:32,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471530324] [2021-11-02 23:04:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:32,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:32,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:32,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471530324] [2021-11-02 23:04:32,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471530324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:32,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:32,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:04:32,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468422578] [2021-11-02 23:04:32,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:04:32,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:04:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:04:32,811 INFO L87 Difference]: Start difference. First operand 152 states and 215 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:32,893 INFO L93 Difference]: Finished difference Result 280 states and 410 transitions. [2021-11-02 23:04:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:04:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-02 23:04:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:32,896 INFO L225 Difference]: With dead ends: 280 [2021-11-02 23:04:32,897 INFO L226 Difference]: Without dead ends: 197 [2021-11-02 23:04:32,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:04:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-02 23:04:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-11-02 23:04:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.450777202072539) internal successors, (280), 194 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 280 transitions. [2021-11-02 23:04:32,948 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 280 transitions. Word has length 48 [2021-11-02 23:04:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:32,949 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 280 transitions. [2021-11-02 23:04:32,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 280 transitions. [2021-11-02 23:04:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 23:04:32,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:32,952 INFO L513 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] [2021-11-02 23:04:32,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:04:32,952 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1589815569, now seen corresponding path program 1 times [2021-11-02 23:04:32,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:32,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699528012] [2021-11-02 23:04:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:32,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:33,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:33,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699528012] [2021-11-02 23:04:33,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699528012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:33,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:33,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:04:33,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302223499] [2021-11-02 23:04:33,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:04:33,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:04:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:33,167 INFO L87 Difference]: Start difference. First operand 195 states and 280 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:33,342 INFO L93 Difference]: Finished difference Result 360 states and 527 transitions. [2021-11-02 23:04:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:33,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 23:04:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:33,351 INFO L225 Difference]: With dead ends: 360 [2021-11-02 23:04:33,351 INFO L226 Difference]: Without dead ends: 195 [2021-11-02 23:04:33,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:04:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-02 23:04:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-02 23:04:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.4300518134715026) internal successors, (276), 194 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 276 transitions. [2021-11-02 23:04:33,392 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 276 transitions. Word has length 49 [2021-11-02 23:04:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:33,394 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 276 transitions. [2021-11-02 23:04:33,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 276 transitions. [2021-11-02 23:04:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:04:33,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:33,401 INFO L513 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] [2021-11-02 23:04:33,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:04:33,401 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1059764234, now seen corresponding path program 1 times [2021-11-02 23:04:33,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:33,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305870164] [2021-11-02 23:04:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:33,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:33,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:33,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305870164] [2021-11-02 23:04:33,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305870164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:33,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:33,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:04:33,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001727700] [2021-11-02 23:04:33,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:04:33,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:33,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:04:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:33,526 INFO L87 Difference]: Start difference. First operand 195 states and 276 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:33,715 INFO L93 Difference]: Finished difference Result 517 states and 751 transitions. [2021-11-02 23:04:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 23:04:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:33,720 INFO L225 Difference]: With dead ends: 517 [2021-11-02 23:04:33,721 INFO L226 Difference]: Without dead ends: 344 [2021-11-02 23:04:33,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:04:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-02 23:04:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 339. [2021-11-02 23:04:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 337 states have (on average 1.456973293768546) internal successors, (491), 338 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 491 transitions. [2021-11-02 23:04:33,784 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 491 transitions. Word has length 50 [2021-11-02 23:04:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:33,785 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 491 transitions. [2021-11-02 23:04:33,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 491 transitions. [2021-11-02 23:04:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:04:33,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:33,789 INFO L513 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] [2021-11-02 23:04:33,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:04:33,790 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:33,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1443063375, now seen corresponding path program 1 times [2021-11-02 23:04:33,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:33,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80031362] [2021-11-02 23:04:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:33,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:33,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:33,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80031362] [2021-11-02 23:04:33,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80031362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:33,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:33,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:04:33,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434979130] [2021-11-02 23:04:33,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:04:33,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:33,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:04:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:04:33,918 INFO L87 Difference]: Start difference. First operand 339 states and 491 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:34,135 INFO L93 Difference]: Finished difference Result 924 states and 1357 transitions. [2021-11-02 23:04:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 23:04:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:34,140 INFO L225 Difference]: With dead ends: 924 [2021-11-02 23:04:34,140 INFO L226 Difference]: Without dead ends: 611 [2021-11-02 23:04:34,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:04:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-02 23:04:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 606. [2021-11-02 23:04:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 604 states have (on average 1.4619205298013245) internal successors, (883), 605 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 883 transitions. [2021-11-02 23:04:34,205 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 883 transitions. Word has length 51 [2021-11-02 23:04:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:34,205 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 883 transitions. [2021-11-02 23:04:34,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 883 transitions. [2021-11-02 23:04:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:04:34,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:34,208 INFO L513 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] [2021-11-02 23:04:34,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:04:34,209 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 605812254, now seen corresponding path program 1 times [2021-11-02 23:04:34,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:34,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133860376] [2021-11-02 23:04:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:34,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:34,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:34,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133860376] [2021-11-02 23:04:34,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133860376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:34,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:34,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:04:34,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853191994] [2021-11-02 23:04:34,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:04:34,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:04:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:34,365 INFO L87 Difference]: Start difference. First operand 606 states and 883 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:34,582 INFO L93 Difference]: Finished difference Result 2135 states and 3159 transitions. [2021-11-02 23:04:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:34,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:04:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:34,605 INFO L225 Difference]: With dead ends: 2135 [2021-11-02 23:04:34,605 INFO L226 Difference]: Without dead ends: 1663 [2021-11-02 23:04:34,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-11-02 23:04:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 951. [2021-11-02 23:04:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 949 states have (on average 1.4720758693361433) internal successors, (1397), 950 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1397 transitions. [2021-11-02 23:04:34,734 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1397 transitions. Word has length 52 [2021-11-02 23:04:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:34,735 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1397 transitions. [2021-11-02 23:04:34,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1397 transitions. [2021-11-02 23:04:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:04:34,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:34,737 INFO L513 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] [2021-11-02 23:04:34,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:04:34,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1372292342, now seen corresponding path program 1 times [2021-11-02 23:04:34,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:34,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482935939] [2021-11-02 23:04:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:34,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:34,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:34,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482935939] [2021-11-02 23:04:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482935939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:34,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:34,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:04:34,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942917532] [2021-11-02 23:04:34,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:04:34,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:04:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:34,834 INFO L87 Difference]: Start difference. First operand 951 states and 1397 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:35,090 INFO L93 Difference]: Finished difference Result 2431 states and 3601 transitions. [2021-11-02 23:04:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:35,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:04:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:35,107 INFO L225 Difference]: With dead ends: 2431 [2021-11-02 23:04:35,107 INFO L226 Difference]: Without dead ends: 1959 [2021-11-02 23:04:35,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:04:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-11-02 23:04:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1459. [2021-11-02 23:04:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1457 states have (on average 1.474948524365134) internal successors, (2149), 1458 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2149 transitions. [2021-11-02 23:04:35,278 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2149 transitions. Word has length 52 [2021-11-02 23:04:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:35,280 INFO L470 AbstractCegarLoop]: Abstraction has 1459 states and 2149 transitions. [2021-11-02 23:04:35,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2149 transitions. [2021-11-02 23:04:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:04:35,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:35,282 INFO L513 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] [2021-11-02 23:04:35,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:04:35,282 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:35,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1980798090, now seen corresponding path program 1 times [2021-11-02 23:04:35,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:35,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547027203] [2021-11-02 23:04:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:35,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:35,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:35,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547027203] [2021-11-02 23:04:35,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547027203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:35,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:35,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:04:35,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59909519] [2021-11-02 23:04:35,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:04:35,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:04:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:35,409 INFO L87 Difference]: Start difference. First operand 1459 states and 2149 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:35,684 INFO L93 Difference]: Finished difference Result 2850 states and 4227 transitions. [2021-11-02 23:04:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:35,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:04:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:35,699 INFO L225 Difference]: With dead ends: 2850 [2021-11-02 23:04:35,700 INFO L226 Difference]: Without dead ends: 2378 [2021-11-02 23:04:35,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:04:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-11-02 23:04:35,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1800. [2021-11-02 23:04:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.4788654060066742) internal successors, (2659), 1799 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2659 transitions. [2021-11-02 23:04:35,880 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2659 transitions. Word has length 52 [2021-11-02 23:04:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2659 transitions. [2021-11-02 23:04:35,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2659 transitions. [2021-11-02 23:04:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:04:35,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:35,882 INFO L513 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] [2021-11-02 23:04:35,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:04:35,882 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1423750650, now seen corresponding path program 1 times [2021-11-02 23:04:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:35,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841258411] [2021-11-02 23:04:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:35,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:36,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:36,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841258411] [2021-11-02 23:04:36,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841258411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:36,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:36,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:04:36,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136416476] [2021-11-02 23:04:36,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:04:36,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:36,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:04:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:04:36,159 INFO L87 Difference]: Start difference. First operand 1800 states and 2659 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:37,059 INFO L93 Difference]: Finished difference Result 5128 states and 7622 transitions. [2021-11-02 23:04:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:04:37,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:04:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:37,080 INFO L225 Difference]: With dead ends: 5128 [2021-11-02 23:04:37,081 INFO L226 Difference]: Without dead ends: 3463 [2021-11-02 23:04:37,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:04:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3463 states. [2021-11-02 23:04:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3463 to 1800. [2021-11-02 23:04:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.478309232480534) internal successors, (2658), 1799 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2658 transitions. [2021-11-02 23:04:37,360 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2658 transitions. Word has length 53 [2021-11-02 23:04:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:37,360 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2658 transitions. [2021-11-02 23:04:37,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2658 transitions. [2021-11-02 23:04:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:04:37,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:37,362 INFO L513 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] [2021-11-02 23:04:37,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:04:37,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1451758686, now seen corresponding path program 1 times [2021-11-02 23:04:37,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:37,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525756751] [2021-11-02 23:04:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:37,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:37,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:37,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525756751] [2021-11-02 23:04:37,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525756751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:37,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:37,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 23:04:37,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075120618] [2021-11-02 23:04:37,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:04:37,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:37,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:04:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:04:37,584 INFO L87 Difference]: Start difference. First operand 1800 states and 2658 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:38,635 INFO L93 Difference]: Finished difference Result 3938 states and 5812 transitions. [2021-11-02 23:04:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:04:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:04:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:38,650 INFO L225 Difference]: With dead ends: 3938 [2021-11-02 23:04:38,650 INFO L226 Difference]: Without dead ends: 2278 [2021-11-02 23:04:38,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:04:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-11-02 23:04:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1800. [2021-11-02 23:04:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.4766407119021134) internal successors, (2655), 1799 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2655 transitions. [2021-11-02 23:04:38,912 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2655 transitions. Word has length 53 [2021-11-02 23:04:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:38,913 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2655 transitions. [2021-11-02 23:04:38,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2655 transitions. [2021-11-02 23:04:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:04:38,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:38,914 INFO L513 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] [2021-11-02 23:04:38,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:04:38,915 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1755644783, now seen corresponding path program 1 times [2021-11-02 23:04:38,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:38,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197071546] [2021-11-02 23:04:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:38,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:39,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:39,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197071546] [2021-11-02 23:04:39,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197071546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:39,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:39,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 23:04:39,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843638278] [2021-11-02 23:04:39,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:04:39,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:04:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:04:39,143 INFO L87 Difference]: Start difference. First operand 1800 states and 2655 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:40,154 INFO L93 Difference]: Finished difference Result 4320 states and 6389 transitions. [2021-11-02 23:04:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:04:40,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 23:04:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:40,172 INFO L225 Difference]: With dead ends: 4320 [2021-11-02 23:04:40,173 INFO L226 Difference]: Without dead ends: 2657 [2021-11-02 23:04:40,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:04:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-11-02 23:04:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1800. [2021-11-02 23:04:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.471635150166852) internal successors, (2646), 1799 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2646 transitions. [2021-11-02 23:04:40,461 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2646 transitions. Word has length 54 [2021-11-02 23:04:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:40,461 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2646 transitions. [2021-11-02 23:04:40,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2646 transitions. [2021-11-02 23:04:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:04:40,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:40,462 INFO L513 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] [2021-11-02 23:04:40,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:04:40,463 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1521991144, now seen corresponding path program 1 times [2021-11-02 23:04:40,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:40,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757651720] [2021-11-02 23:04:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:40,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:41,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:41,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757651720] [2021-11-02 23:04:41,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757651720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:41,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:41,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-02 23:04:41,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537447317] [2021-11-02 23:04:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:04:41,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:04:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:04:41,229 INFO L87 Difference]: Start difference. First operand 1800 states and 2646 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:45,105 INFO L93 Difference]: Finished difference Result 7478 states and 11132 transitions. [2021-11-02 23:04:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:04:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:04:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:45,152 INFO L225 Difference]: With dead ends: 7478 [2021-11-02 23:04:45,152 INFO L226 Difference]: Without dead ends: 6667 [2021-11-02 23:04:45,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:04:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-11-02 23:04:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 1800. [2021-11-02 23:04:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.4705228031145718) internal successors, (2644), 1799 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2644 transitions. [2021-11-02 23:04:45,495 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2644 transitions. Word has length 55 [2021-11-02 23:04:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:45,496 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2644 transitions. [2021-11-02 23:04:45,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2644 transitions. [2021-11-02 23:04:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:04:45,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:45,498 INFO L513 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] [2021-11-02 23:04:45,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:04:45,498 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash 822613335, now seen corresponding path program 1 times [2021-11-02 23:04:45,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:45,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496536528] [2021-11-02 23:04:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:45,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:46,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:46,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496536528] [2021-11-02 23:04:46,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496536528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:46,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:46,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-02 23:04:46,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452874395] [2021-11-02 23:04:46,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:04:46,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:46,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:04:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:04:46,201 INFO L87 Difference]: Start difference. First operand 1800 states and 2644 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:50,771 INFO L93 Difference]: Finished difference Result 15317 states and 22906 transitions. [2021-11-02 23:04:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:04:50,772 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:04:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:50,822 INFO L225 Difference]: With dead ends: 15317 [2021-11-02 23:04:50,823 INFO L226 Difference]: Without dead ends: 14512 [2021-11-02 23:04:50,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:04:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-11-02 23:04:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 1794. [2021-11-02 23:04:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1792 states have (on average 1.4709821428571428) internal successors, (2636), 1793 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2636 transitions. [2021-11-02 23:04:51,234 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2636 transitions. Word has length 55 [2021-11-02 23:04:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:51,234 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 2636 transitions. [2021-11-02 23:04:51,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2636 transitions. [2021-11-02 23:04:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:04:51,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:51,235 INFO L513 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] [2021-11-02 23:04:51,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:04:51,236 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1171871732, now seen corresponding path program 1 times [2021-11-02 23:04:51,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:51,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256808210] [2021-11-02 23:04:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:51,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:51,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:51,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256808210] [2021-11-02 23:04:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256808210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:51,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:51,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-02 23:04:51,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252207314] [2021-11-02 23:04:51,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:04:51,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:04:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:04:51,863 INFO L87 Difference]: Start difference. First operand 1794 states and 2636 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:55,703 INFO L93 Difference]: Finished difference Result 8573 states and 12766 transitions. [2021-11-02 23:04:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:04:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:04:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:55,721 INFO L225 Difference]: With dead ends: 8573 [2021-11-02 23:04:55,722 INFO L226 Difference]: Without dead ends: 8092 [2021-11-02 23:04:55,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:04:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-11-02 23:04:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 1794. [2021-11-02 23:04:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1792 states have (on average 1.4704241071428572) internal successors, (2635), 1793 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2635 transitions. [2021-11-02 23:04:56,082 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2635 transitions. Word has length 55 [2021-11-02 23:04:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:56,083 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 2635 transitions. [2021-11-02 23:04:56,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2635 transitions. [2021-11-02 23:04:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:04:56,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:56,084 INFO L513 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] [2021-11-02 23:04:56,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:04:56,084 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:56,085 INFO L85 PathProgramCache]: Analyzing trace with hash 380290649, now seen corresponding path program 1 times [2021-11-02 23:04:56,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:56,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223181575] [2021-11-02 23:04:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:56,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:04:56,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:56,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223181575] [2021-11-02 23:04:56,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223181575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:56,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:56,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-02 23:04:56,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642368777] [2021-11-02 23:04:56,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:04:56,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:04:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:04:56,782 INFO L87 Difference]: Start difference. First operand 1794 states and 2635 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:00,258 INFO L93 Difference]: Finished difference Result 7056 states and 10501 transitions. [2021-11-02 23:05:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:05:00,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:05:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:00,275 INFO L225 Difference]: With dead ends: 7056 [2021-11-02 23:05:00,276 INFO L226 Difference]: Without dead ends: 6245 [2021-11-02 23:05:00,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=305, Invalid=1255, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:05:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2021-11-02 23:05:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 1788. [2021-11-02 23:05:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1786 states have (on average 1.4697648376259798) internal successors, (2625), 1787 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2625 transitions. [2021-11-02 23:05:00,772 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2625 transitions. Word has length 55 [2021-11-02 23:05:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:00,773 INFO L470 AbstractCegarLoop]: Abstraction has 1788 states and 2625 transitions. [2021-11-02 23:05:00,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2625 transitions. [2021-11-02 23:05:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:05:00,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:00,775 INFO L513 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] [2021-11-02 23:05:00,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:05:00,775 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1519790906, now seen corresponding path program 1 times [2021-11-02 23:05:00,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:00,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654335134] [2021-11-02 23:05:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:00,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:01,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:01,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654335134] [2021-11-02 23:05:01,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654335134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:01,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:01,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 23:05:01,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827510082] [2021-11-02 23:05:01,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:05:01,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:05:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:05:01,330 INFO L87 Difference]: Start difference. First operand 1788 states and 2625 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:04,202 INFO L93 Difference]: Finished difference Result 5805 states and 8638 transitions. [2021-11-02 23:05:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:05:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-02 23:05:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:04,211 INFO L225 Difference]: With dead ends: 5805 [2021-11-02 23:05:04,212 INFO L226 Difference]: Without dead ends: 4984 [2021-11-02 23:05:04,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:05:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-11-02 23:05:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 1772. [2021-11-02 23:05:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1770 states have (on average 1.4717514124293785) internal successors, (2605), 1771 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2605 transitions. [2021-11-02 23:05:04,767 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2605 transitions. Word has length 56 [2021-11-02 23:05:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:04,768 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2605 transitions. [2021-11-02 23:05:04,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2605 transitions. [2021-11-02 23:05:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:05:04,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:04,769 INFO L513 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] [2021-11-02 23:05:04,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:05:04,770 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1258334466, now seen corresponding path program 1 times [2021-11-02 23:05:04,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:04,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351483124] [2021-11-02 23:05:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:04,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:05,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:05,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351483124] [2021-11-02 23:05:05,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351483124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:05,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-02 23:05:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778901669] [2021-11-02 23:05:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:05:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:05,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:05:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:05:05,435 INFO L87 Difference]: Start difference. First operand 1772 states and 2605 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:12,027 INFO L93 Difference]: Finished difference Result 13096 states and 19561 transitions. [2021-11-02 23:05:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:05:12,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-02 23:05:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:12,054 INFO L225 Difference]: With dead ends: 13096 [2021-11-02 23:05:12,054 INFO L226 Difference]: Without dead ends: 12285 [2021-11-02 23:05:12,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=349, Invalid=1291, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:05:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12285 states. [2021-11-02 23:05:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12285 to 1760. [2021-11-02 23:05:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1758 states have (on average 1.472127417519909) internal successors, (2588), 1759 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2588 transitions. [2021-11-02 23:05:12,648 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2588 transitions. Word has length 56 [2021-11-02 23:05:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:12,648 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 2588 transitions. [2021-11-02 23:05:12,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2588 transitions. [2021-11-02 23:05:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:05:12,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:12,650 INFO L513 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] [2021-11-02 23:05:12,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:05:12,650 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1802177434, now seen corresponding path program 1 times [2021-11-02 23:05:12,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:12,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417624536] [2021-11-02 23:05:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:12,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:13,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:13,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417624536] [2021-11-02 23:05:13,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417624536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:13,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:13,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-02 23:05:13,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238625424] [2021-11-02 23:05:13,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:05:13,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:05:13,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:05:13,447 INFO L87 Difference]: Start difference. First operand 1760 states and 2588 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:18,151 INFO L93 Difference]: Finished difference Result 7398 states and 11014 transitions. [2021-11-02 23:05:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:05:18,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-02 23:05:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:18,164 INFO L225 Difference]: With dead ends: 7398 [2021-11-02 23:05:18,164 INFO L226 Difference]: Without dead ends: 6593 [2021-11-02 23:05:18,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=328, Invalid=1232, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:05:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2021-11-02 23:05:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 1760. [2021-11-02 23:05:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1758 states have (on average 1.4715585893060297) internal successors, (2587), 1759 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2587 transitions. [2021-11-02 23:05:18,872 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2587 transitions. Word has length 56 [2021-11-02 23:05:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:18,872 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 2587 transitions. [2021-11-02 23:05:18,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2587 transitions. [2021-11-02 23:05:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:05:18,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:18,873 INFO L513 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] [2021-11-02 23:05:18,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:05:18,874 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1616369829, now seen corresponding path program 1 times [2021-11-02 23:05:18,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:18,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261522630] [2021-11-02 23:05:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:18,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:19,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:19,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261522630] [2021-11-02 23:05:19,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261522630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:19,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:19,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 23:05:19,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587964677] [2021-11-02 23:05:19,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:05:19,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:05:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:05:19,194 INFO L87 Difference]: Start difference. First operand 1760 states and 2587 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:22,040 INFO L93 Difference]: Finished difference Result 7410 states and 11058 transitions. [2021-11-02 23:05:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:05:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-02 23:05:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:22,047 INFO L225 Difference]: With dead ends: 7410 [2021-11-02 23:05:22,047 INFO L226 Difference]: Without dead ends: 6584 [2021-11-02 23:05:22,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:05:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-11-02 23:05:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 1733. [2021-11-02 23:05:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1731 states have (on average 1.4766031195840554) internal successors, (2556), 1732 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2556 transitions. [2021-11-02 23:05:22,795 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2556 transitions. Word has length 56 [2021-11-02 23:05:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:22,795 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 2556 transitions. [2021-11-02 23:05:22,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2556 transitions. [2021-11-02 23:05:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:05:22,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:22,796 INFO L513 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] [2021-11-02 23:05:22,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:05:22,797 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash 770656930, now seen corresponding path program 1 times [2021-11-02 23:05:22,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:22,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383749395] [2021-11-02 23:05:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:22,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:23,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:23,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383749395] [2021-11-02 23:05:23,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383749395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:23,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:23,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 23:05:23,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019367746] [2021-11-02 23:05:23,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:05:23,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:23,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:05:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:05:23,106 INFO L87 Difference]: Start difference. First operand 1733 states and 2556 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:25,049 INFO L93 Difference]: Finished difference Result 4141 states and 6170 transitions. [2021-11-02 23:05:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:05:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-02 23:05:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:25,057 INFO L225 Difference]: With dead ends: 4141 [2021-11-02 23:05:25,057 INFO L226 Difference]: Without dead ends: 3325 [2021-11-02 23:05:25,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:05:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2021-11-02 23:05:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 1716. [2021-11-02 23:05:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1714 states have (on average 1.4778296382730456) internal successors, (2533), 1715 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2533 transitions. [2021-11-02 23:05:25,690 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2533 transitions. Word has length 56 [2021-11-02 23:05:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:25,690 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 2533 transitions. [2021-11-02 23:05:25,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2533 transitions. [2021-11-02 23:05:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:05:25,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:25,692 INFO L513 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] [2021-11-02 23:05:25,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 23:05:25,692 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1179705887, now seen corresponding path program 1 times [2021-11-02 23:05:25,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:25,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088882077] [2021-11-02 23:05:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:25,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:26,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:26,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088882077] [2021-11-02 23:05:26,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088882077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:26,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:26,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 23:05:26,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787624725] [2021-11-02 23:05:26,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:05:26,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:05:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:05:26,188 INFO L87 Difference]: Start difference. First operand 1716 states and 2533 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:29,374 INFO L93 Difference]: Finished difference Result 6777 states and 10105 transitions. [2021-11-02 23:05:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:05:29,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-02 23:05:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:29,381 INFO L225 Difference]: With dead ends: 6777 [2021-11-02 23:05:29,381 INFO L226 Difference]: Without dead ends: 5972 [2021-11-02 23:05:29,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:05:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2021-11-02 23:05:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 1710. [2021-11-02 23:05:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1708 states have (on average 1.4783372365339578) internal successors, (2525), 1709 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2525 transitions. [2021-11-02 23:05:30,038 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2525 transitions. Word has length 56 [2021-11-02 23:05:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:30,038 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2525 transitions. [2021-11-02 23:05:30,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2525 transitions. [2021-11-02 23:05:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:05:30,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:30,039 INFO L513 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] [2021-11-02 23:05:30,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 23:05:30,039 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash -684019272, now seen corresponding path program 1 times [2021-11-02 23:05:30,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:30,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521239233] [2021-11-02 23:05:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:30,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:30,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:30,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521239233] [2021-11-02 23:05:30,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521239233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:30,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:30,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-02 23:05:30,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338497783] [2021-11-02 23:05:30,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:05:30,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:30,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:05:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:05:30,997 INFO L87 Difference]: Start difference. First operand 1710 states and 2525 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:38,765 INFO L93 Difference]: Finished difference Result 12188 states and 18245 transitions. [2021-11-02 23:05:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:05:38,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 23:05:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:38,777 INFO L225 Difference]: With dead ends: 12188 [2021-11-02 23:05:38,777 INFO L226 Difference]: Without dead ends: 11383 [2021-11-02 23:05:38,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=347, Invalid=1815, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:05:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11383 states. [2021-11-02 23:05:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11383 to 1701. [2021-11-02 23:05:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 1.4794117647058824) internal successors, (2515), 1700 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2515 transitions. [2021-11-02 23:05:39,538 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2515 transitions. Word has length 57 [2021-11-02 23:05:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:39,538 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 2515 transitions. [2021-11-02 23:05:39,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2515 transitions. [2021-11-02 23:05:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 23:05:39,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:39,540 INFO L513 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] [2021-11-02 23:05:39,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:05:39,541 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1531780676, now seen corresponding path program 1 times [2021-11-02 23:05:39,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:39,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421309179] [2021-11-02 23:05:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:39,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:39,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:39,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421309179] [2021-11-02 23:05:39,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421309179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:39,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:39,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:39,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581021454] [2021-11-02 23:05:39,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:39,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:39,582 INFO L87 Difference]: Start difference. First operand 1701 states and 2515 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:41,195 INFO L93 Difference]: Finished difference Result 4665 states and 6925 transitions. [2021-11-02 23:05:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:41,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-02 23:05:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:41,199 INFO L225 Difference]: With dead ends: 4665 [2021-11-02 23:05:41,199 INFO L226 Difference]: Without dead ends: 3059 [2021-11-02 23:05:41,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2021-11-02 23:05:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 3017. [2021-11-02 23:05:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 1.4505968169761274) internal successors, (4375), 3016 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4375 transitions. [2021-11-02 23:05:42,495 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4375 transitions. Word has length 75 [2021-11-02 23:05:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:42,496 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4375 transitions. [2021-11-02 23:05:42,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4375 transitions. [2021-11-02 23:05:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:05:42,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:42,498 INFO L513 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] [2021-11-02 23:05:42,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 23:05:42,498 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash 241252331, now seen corresponding path program 1 times [2021-11-02 23:05:42,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:42,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408813367] [2021-11-02 23:05:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:42,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:42,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:42,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408813367] [2021-11-02 23:05:42,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408813367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:42,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:42,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:42,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645883961] [2021-11-02 23:05:42,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:42,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:42,540 INFO L87 Difference]: Start difference. First operand 3017 states and 4375 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:44,987 INFO L93 Difference]: Finished difference Result 8541 states and 12361 transitions. [2021-11-02 23:05:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:44,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-02 23:05:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:44,993 INFO L225 Difference]: With dead ends: 8541 [2021-11-02 23:05:44,993 INFO L226 Difference]: Without dead ends: 5619 [2021-11-02 23:05:44,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-11-02 23:05:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5337. [2021-11-02 23:05:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 1.433095952023988) internal successors, (7647), 5336 states have internal predecessors, (7647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 7647 transitions. [2021-11-02 23:05:47,286 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 7647 transitions. Word has length 76 [2021-11-02 23:05:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:47,286 INFO L470 AbstractCegarLoop]: Abstraction has 5337 states and 7647 transitions. [2021-11-02 23:05:47,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 7647 transitions. [2021-11-02 23:05:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:05:47,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:47,288 INFO L513 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] [2021-11-02 23:05:47,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 23:05:47,289 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1306565925, now seen corresponding path program 1 times [2021-11-02 23:05:47,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:47,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105077226] [2021-11-02 23:05:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:47,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:47,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:47,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105077226] [2021-11-02 23:05:47,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105077226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:47,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:47,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:47,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345081335] [2021-11-02 23:05:47,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:47,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:47,334 INFO L87 Difference]: Start difference. First operand 5337 states and 7647 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:52,205 INFO L93 Difference]: Finished difference Result 15181 states and 21617 transitions. [2021-11-02 23:05:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-02 23:05:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:52,218 INFO L225 Difference]: With dead ends: 15181 [2021-11-02 23:05:52,218 INFO L226 Difference]: Without dead ends: 9939 [2021-11-02 23:05:52,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9939 states. [2021-11-02 23:05:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9939 to 9297. [2021-11-02 23:05:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 1.4103915662650603) internal successors, (13111), 9296 states have internal predecessors, (13111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 13111 transitions. [2021-11-02 23:05:56,440 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 13111 transitions. Word has length 77 [2021-11-02 23:05:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:56,441 INFO L470 AbstractCegarLoop]: Abstraction has 9297 states and 13111 transitions. [2021-11-02 23:05:56,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 13111 transitions. [2021-11-02 23:05:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 23:05:56,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:56,443 INFO L513 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] [2021-11-02 23:05:56,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 23:05:56,444 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1695604898, now seen corresponding path program 1 times [2021-11-02 23:05:56,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:56,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481400990] [2021-11-02 23:05:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:56,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:56,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:56,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481400990] [2021-11-02 23:05:56,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481400990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:56,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:56,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:05:56,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458539019] [2021-11-02 23:05:56,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:05:56,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:05:56,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:05:56,515 INFO L87 Difference]: Start difference. First operand 9297 states and 13111 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:05,137 INFO L93 Difference]: Finished difference Result 16373 states and 22784 transitions. [2021-11-02 23:06:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:06:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-02 23:06:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:05,158 INFO L225 Difference]: With dead ends: 16373 [2021-11-02 23:06:05,158 INFO L226 Difference]: Without dead ends: 16371 [2021-11-02 23:06:05,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:06:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16371 states. [2021-11-02 23:06:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16371 to 9681. [2021-11-02 23:06:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9681 states, 9680 states have (on average 1.3858471074380165) internal successors, (13415), 9680 states have internal predecessors, (13415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9681 states to 9681 states and 13415 transitions. [2021-11-02 23:06:09,677 INFO L78 Accepts]: Start accepts. Automaton has 9681 states and 13415 transitions. Word has length 78 [2021-11-02 23:06:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:09,678 INFO L470 AbstractCegarLoop]: Abstraction has 9681 states and 13415 transitions. [2021-11-02 23:06:09,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9681 states and 13415 transitions. [2021-11-02 23:06:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:06:09,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:09,680 INFO L513 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] [2021-11-02 23:06:09,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-02 23:06:09,681 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:09,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1415916470, now seen corresponding path program 1 times [2021-11-02 23:06:09,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:09,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494113239] [2021-11-02 23:06:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:09,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:09,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:09,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494113239] [2021-11-02 23:06:09,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494113239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:09,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:09,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:09,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865798861] [2021-11-02 23:06:09,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:09,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:09,727 INFO L87 Difference]: Start difference. First operand 9681 states and 13415 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:17,694 INFO L93 Difference]: Finished difference Result 25245 states and 34921 transitions. [2021-11-02 23:06:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-02 23:06:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:17,712 INFO L225 Difference]: With dead ends: 25245 [2021-11-02 23:06:17,713 INFO L226 Difference]: Without dead ends: 15659 [2021-11-02 23:06:17,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15659 states. [2021-11-02 23:06:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15659 to 14441. [2021-11-02 23:06:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14441 states, 14440 states have (on average 1.3594875346260389) internal successors, (19631), 14440 states have internal predecessors, (19631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14441 states to 14441 states and 19631 transitions. [2021-11-02 23:06:24,481 INFO L78 Accepts]: Start accepts. Automaton has 14441 states and 19631 transitions. Word has length 79 [2021-11-02 23:06:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:24,482 INFO L470 AbstractCegarLoop]: Abstraction has 14441 states and 19631 transitions. [2021-11-02 23:06:24,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14441 states and 19631 transitions. [2021-11-02 23:06:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:06:24,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:24,488 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:24,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-02 23:06:24,489 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1940322908, now seen corresponding path program 1 times [2021-11-02 23:06:24,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:24,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623761271] [2021-11-02 23:06:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:24,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:24,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:24,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623761271] [2021-11-02 23:06:24,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623761271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:24,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:24,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:24,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770971139] [2021-11-02 23:06:24,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:24,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:24,618 INFO L87 Difference]: Start difference. First operand 14441 states and 19631 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:31,812 INFO L93 Difference]: Finished difference Result 28565 states and 38841 transitions. [2021-11-02 23:06:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-02 23:06:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:31,829 INFO L225 Difference]: With dead ends: 28565 [2021-11-02 23:06:31,829 INFO L226 Difference]: Without dead ends: 14219 [2021-11-02 23:06:31,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2021-11-02 23:06:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 14217. [2021-11-02 23:06:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14217 states, 14216 states have (on average 1.3361705120990433) internal successors, (18995), 14216 states have internal predecessors, (18995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 18995 transitions. [2021-11-02 23:06:38,600 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 18995 transitions. Word has length 100 [2021-11-02 23:06:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:38,600 INFO L470 AbstractCegarLoop]: Abstraction has 14217 states and 18995 transitions. [2021-11-02 23:06:38,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 18995 transitions. [2021-11-02 23:06:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:06:38,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:38,606 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:38,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-02 23:06:38,606 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1124551470, now seen corresponding path program 1 times [2021-11-02 23:06:38,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:38,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478579647] [2021-11-02 23:06:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:38,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:38,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:38,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478579647] [2021-11-02 23:06:38,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478579647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:38,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689660265] [2021-11-02 23:06:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:38,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:38,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:38,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:38,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:06:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:06:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:41,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689660265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:41,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:41,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-02 23:06:41,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324491401] [2021-11-02 23:06:41,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:06:41,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:41,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:06:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:06:41,706 INFO L87 Difference]: Start difference. First operand 14217 states and 18995 transitions. Second operand has 22 states, 22 states have (on average 8.636363636363637) internal successors, (190), 21 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:28,531 INFO L93 Difference]: Finished difference Result 63615 states and 83991 transitions. [2021-11-02 23:07:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:07:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.636363636363637) internal successors, (190), 21 states have internal predecessors, (190), 0 states have call successors, (0), 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 100 [2021-11-02 23:07:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:28,603 INFO L225 Difference]: With dead ends: 63615 [2021-11-02 23:07:28,603 INFO L226 Difference]: Without dead ends: 49493 [2021-11-02 23:07:28,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1027, Invalid=2633, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:07:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49493 states. [2021-11-02 23:07:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49493 to 24321. [2021-11-02 23:07:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24321 states, 24320 states have (on average 1.3333059210526317) internal successors, (32426), 24320 states have internal predecessors, (32426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24321 states to 24321 states and 32426 transitions. [2021-11-02 23:07:47,122 INFO L78 Accepts]: Start accepts. Automaton has 24321 states and 32426 transitions. Word has length 100 [2021-11-02 23:07:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:47,122 INFO L470 AbstractCegarLoop]: Abstraction has 24321 states and 32426 transitions. [2021-11-02 23:07:47,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.636363636363637) internal successors, (190), 21 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24321 states and 32426 transitions. [2021-11-02 23:07:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 23:07:47,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:47,130 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:47,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:47,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:07:47,348 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash -13722873, now seen corresponding path program 1 times [2021-11-02 23:07:47,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:47,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620587623] [2021-11-02 23:07:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:47,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:47,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:47,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620587623] [2021-11-02 23:07:47,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620587623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:47,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344940791] [2021-11-02 23:07:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:47,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:47,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:47,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:07:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:07:48,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:07:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344940791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:49,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:49,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-11-02 23:07:49,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158905610] [2021-11-02 23:07:49,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:07:49,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:07:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:07:49,759 INFO L87 Difference]: Start difference. First operand 24321 states and 32426 transitions. Second operand has 21 states, 21 states have (on average 9.142857142857142) internal successors, (192), 20 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:25,032 INFO L93 Difference]: Finished difference Result 123593 states and 161569 transitions. [2021-11-02 23:09:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-02 23:09:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.142857142857142) internal successors, (192), 20 states have internal predecessors, (192), 0 states have call successors, (0), 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 101 [2021-11-02 23:09:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:25,246 INFO L225 Difference]: With dead ends: 123593 [2021-11-02 23:09:25,247 INFO L226 Difference]: Without dead ends: 109471 [2021-11-02 23:09:25,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6893 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3121, Invalid=16061, Unknown=0, NotChecked=0, Total=19182 [2021-11-02 23:09:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109471 states. [2021-11-02 23:09:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109471 to 24299. [2021-11-02 23:09:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24299 states, 24298 states have (on average 1.333525393036464) internal successors, (32402), 24298 states have internal predecessors, (32402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24299 states to 24299 states and 32402 transitions. [2021-11-02 23:09:45,058 INFO L78 Accepts]: Start accepts. Automaton has 24299 states and 32402 transitions. Word has length 101 [2021-11-02 23:09:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:45,059 INFO L470 AbstractCegarLoop]: Abstraction has 24299 states and 32402 transitions. [2021-11-02 23:09:45,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.142857142857142) internal successors, (192), 20 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 24299 states and 32402 transitions. [2021-11-02 23:09:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 23:09:45,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:45,063 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:45,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 23:09:45,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:45,276 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1589646215, now seen corresponding path program 1 times [2021-11-02 23:09:45,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:45,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57700800] [2021-11-02 23:09:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:45,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:45,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:45,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57700800] [2021-11-02 23:09:45,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57700800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:45,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741232455] [2021-11-02 23:09:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:45,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:45,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:09:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:09:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:47,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741232455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:47,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:47,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-02 23:09:47,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720205296] [2021-11-02 23:09:47,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:09:47,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:09:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:09:47,768 INFO L87 Difference]: Start difference. First operand 24299 states and 32402 transitions. Second operand has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:59,430 INFO L93 Difference]: Finished difference Result 101095 states and 132692 transitions. [2021-11-02 23:10:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:10:59,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 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 101 [2021-11-02 23:10:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:59,564 INFO L225 Difference]: With dead ends: 101095 [2021-11-02 23:10:59,564 INFO L226 Difference]: Without dead ends: 76869 [2021-11-02 23:10:59,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=642, Invalid=2220, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:10:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76869 states. [2021-11-02 23:11:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76869 to 41363. [2021-11-02 23:11:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41363 states, 41362 states have (on average 1.3249359315313574) internal successors, (54802), 41362 states have internal predecessors, (54802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41363 states to 41363 states and 54802 transitions. [2021-11-02 23:11:32,903 INFO L78 Accepts]: Start accepts. Automaton has 41363 states and 54802 transitions. Word has length 101 [2021-11-02 23:11:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:32,904 INFO L470 AbstractCegarLoop]: Abstraction has 41363 states and 54802 transitions. [2021-11-02 23:11:32,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.45) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 41363 states and 54802 transitions. [2021-11-02 23:11:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 23:11:32,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:32,909 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:32,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:33,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-02 23:11:33,136 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1543942337, now seen corresponding path program 1 times [2021-11-02 23:11:33,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:33,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815874826] [2021-11-02 23:11:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:33,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:33,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:33,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815874826] [2021-11-02 23:11:33,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815874826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:33,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673378195] [2021-11-02 23:11:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:33,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:33,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:33,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:33,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04e3db0-3a40-4c7a-b27e-0ded66a7304e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:11:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:11:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:11:38,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673378195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:11:38,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:11:38,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [11] total 32 [2021-11-02 23:11:38,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488630801] [2021-11-02 23:11:38,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:11:38,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:11:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:11:38,402 INFO L87 Difference]: Start difference. First operand 41363 states and 54802 transitions. Second operand has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:08,427 INFO L93 Difference]: Finished difference Result 140999 states and 186783 transitions. [2021-11-02 23:13:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:13:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.318181818181818) internal successors, (95), 22 states have internal predecessors, (95), 0 states have call successors, (0), 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 101 [2021-11-02 23:13:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:08,642 INFO L225 Difference]: With dead ends: 140999 [2021-11-02 23:13:08,643 INFO L226 Difference]: Without dead ends: 99703 [2021-11-02 23:13:08,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:13:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99703 states.