./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 64bit --witnessprinter.graph.data.programhash 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-03 23:27:29,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 23:27:29,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 23:27:30,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 23:27:30,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 23:27:30,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 23:27:30,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 23:27:30,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 23:27:30,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 23:27:30,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 23:27:30,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 23:27:30,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 23:27:30,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 23:27:30,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 23:27:30,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 23:27:30,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 23:27:30,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 23:27:30,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 23:27:30,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 23:27:30,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 23:27:30,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 23:27:30,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 23:27:30,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 23:27:30,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 23:27:30,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 23:27:30,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 23:27:30,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 23:27:30,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 23:27:30,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 23:27:30,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 23:27:30,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 23:27:30,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 23:27:30,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 23:27:30,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 23:27:30,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 23:27:30,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 23:27:30,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 23:27:30,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 23:27:30,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 23:27:30,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 23:27:30,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 23:27:30,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-03 23:27:30,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 23:27:30,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 23:27:30,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-03 23:27:30,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-03 23:27:30,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 23:27:30,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 23:27:30,084 INFO L138 SettingsManager]: * Use SBE=true [2021-11-03 23:27:30,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 23:27:30,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 23:27:30,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 23:27:30,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 23:27:30,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 23:27:30,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 23:27:30,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 23:27:30,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 23:27:30,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 23:27:30,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 23:27:30,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 23:27:30,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 23:27:30,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 23:27:30,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 23:27:30,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 23:27:30,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 23:27:30,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-03 23:27:30,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 23:27:30,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-03 23:27:30,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-03 23:27:30,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 23:27:30,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 23:27:30,089 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2021-11-03 23:27:30,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 23:27:30,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 23:27:30,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 23:27:30,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 23:27:30,345 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 23:27:30,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-03 23:27:30,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b391daeb/edb6a3eabd454546838adc14bb961d90/FLAGf707f036b [2021-11-03 23:27:30,990 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 23:27:30,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-03 23:27:31,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b391daeb/edb6a3eabd454546838adc14bb961d90/FLAGf707f036b [2021-11-03 23:27:31,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b391daeb/edb6a3eabd454546838adc14bb961d90 [2021-11-03 23:27:31,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 23:27:31,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 23:27:31,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 23:27:31,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 23:27:31,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 23:27:31,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 11:27:31" (1/1) ... [2021-11-03 23:27:31,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2792ded3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:31, skipping insertion in model container [2021-11-03 23:27:31,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 11:27:31" (1/1) ... [2021-11-03 23:27:31,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 23:27:31,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 23:27:31,481 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-03 23:27:31,485 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-03 23:27:31,498 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 23:27:31,502 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 23:27:31,972 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,973 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,973 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,974 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,974 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,995 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,995 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,999 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:31,999 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,004 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,004 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,005 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,220 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 23:27:32,221 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 23:27:32,222 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 23:27:32,223 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 23:27:32,225 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 23:27:32,225 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 23:27:32,225 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 23:27:32,226 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 23:27:32,235 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 23:27:32,238 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 23:27:32,344 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 23:27:32,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 23:27:32,378 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 23:27:32,390 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-03 23:27:32,390 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-03 23:27:32,392 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 23:27:32,392 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 23:27:32,455 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,456 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,456 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,456 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,457 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,461 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,461 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,462 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,462 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,462 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,466 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,466 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,466 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:27:32,499 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 23:27:32,500 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 23:27:32,501 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 23:27:32,501 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 23:27:32,505 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 23:27:32,506 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 23:27:32,506 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 23:27:32,507 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 23:27:32,507 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 23:27:32,507 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 23:27:32,534 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 23:27:32,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 23:27:32,726 INFO L208 MainTranslator]: Completed translation [2021-11-03 23:27:32,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32 WrapperNode [2021-11-03 23:27:32,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 23:27:32,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 23:27:32,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 23:27:32,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 23:27:32,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 23:27:32,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 23:27:32,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 23:27:32,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 23:27:32,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 23:27:32,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 23:27:32,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 23:27:32,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 23:27:32,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (1/1) ... [2021-11-03 23:27:32,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 23:27:32,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:27:32,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 23:27:33,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 23:27:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 23:27:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 23:27:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 23:27:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 23:27:33,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 23:27:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 23:27:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 23:27:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 23:27:33,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 23:27:33,457 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 23:27:33,458 INFO L299 CfgBuilder]: Removed 55 assume(true) statements. [2021-11-03 23:27:33,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 11:27:33 BoogieIcfgContainer [2021-11-03 23:27:33,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 23:27:33,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 23:27:33,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 23:27:33,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 23:27:33,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 11:27:31" (1/3) ... [2021-11-03 23:27:33,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192714c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 11:27:33, skipping insertion in model container [2021-11-03 23:27:33,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:27:32" (2/3) ... [2021-11-03 23:27:33,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192714c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 11:27:33, skipping insertion in model container [2021-11-03 23:27:33,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 11:27:33" (3/3) ... [2021-11-03 23:27:33,467 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2021-11-03 23:27:33,474 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 23:27:33,474 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-03 23:27:33,523 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 23:27:33,534 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 [2021-11-03 23:27:33,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-03 23:27:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 23:27:33,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:33,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:33,569 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash -122732205, now seen corresponding path program 1 times [2021-11-03 23:27:33,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:33,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212015260] [2021-11-03 23:27:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:33,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:33,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:33,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212015260] [2021-11-03 23:27:33,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212015260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:33,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:33,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 23:27:33,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884047052] [2021-11-03 23:27:33,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 23:27:33,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 23:27:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 23:27:33,916 INFO L87 Difference]: Start difference. First operand has 114 states, 109 states have (on average 1.5596330275229358) internal successors, (170), 113 states have internal predecessors, (170), 0 states have call successors, (0), 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 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:34,174 INFO L93 Difference]: Finished difference Result 224 states and 335 transitions. [2021-11-03 23:27:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 23:27:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 23:27:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:34,198 INFO L225 Difference]: With dead ends: 224 [2021-11-03 23:27:34,198 INFO L226 Difference]: Without dead ends: 109 [2021-11-03 23:27:34,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.06ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 23:27:34,205 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.60ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:34,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 231.60ms Time] [2021-11-03 23:27:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-03 23:27:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-03 23:27:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.457142857142857) internal successors, (153), 108 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2021-11-03 23:27:34,242 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 41 [2021-11-03 23:27:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:34,242 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2021-11-03 23:27:34,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2021-11-03 23:27:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 23:27:34,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:34,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:34,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 23:27:34,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1738897517, now seen corresponding path program 1 times [2021-11-03 23:27:34,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:34,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209625282] [2021-11-03 23:27:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:34,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:34,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:34,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209625282] [2021-11-03 23:27:34,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209625282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:34,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:34,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:27:34,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264729070] [2021-11-03 23:27:34,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:34,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:27:34,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:27:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:27:34,409 INFO L87 Difference]: Start difference. First operand 109 states and 153 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:34,799 INFO L93 Difference]: Finished difference Result 254 states and 367 transitions. [2021-11-03 23:27:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:27:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 23:27:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:34,806 INFO L225 Difference]: With dead ends: 254 [2021-11-03 23:27:34,807 INFO L226 Difference]: Without dead ends: 157 [2021-11-03 23:27:34,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.64ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:27:34,811 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.16ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 340.54ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:34,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 566 Unknown, 0 Unchecked, 6.16ms Time], IncrementalHoareTripleChecker [13 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 340.54ms Time] [2021-11-03 23:27:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-03 23:27:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 117. [2021-11-03 23:27:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.424778761061947) internal successors, (161), 116 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2021-11-03 23:27:34,837 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 41 [2021-11-03 23:27:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:34,838 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2021-11-03 23:27:34,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2021-11-03 23:27:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 23:27:34,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:34,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:34,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 23:27:34,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1037297643, now seen corresponding path program 1 times [2021-11-03 23:27:34,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:34,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119030746] [2021-11-03 23:27:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:34,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:34,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119030746] [2021-11-03 23:27:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119030746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:34,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:34,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:27:34,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358452738] [2021-11-03 23:27:34,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:34,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:27:34,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:27:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:27:34,937 INFO L87 Difference]: Start difference. First operand 117 states and 161 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:35,257 INFO L93 Difference]: Finished difference Result 250 states and 354 transitions. [2021-11-03 23:27:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:27:35,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 23:27:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:35,259 INFO L225 Difference]: With dead ends: 250 [2021-11-03 23:27:35,259 INFO L226 Difference]: Without dead ends: 149 [2021-11-03 23:27:35,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.96ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:27:35,260 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 239.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.66ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:35,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 536 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [13 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 300.66ms Time] [2021-11-03 23:27:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-03 23:27:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2021-11-03 23:27:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.396694214876033) internal successors, (169), 124 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2021-11-03 23:27:35,267 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 169 transitions. Word has length 41 [2021-11-03 23:27:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:35,267 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 169 transitions. [2021-11-03 23:27:35,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 169 transitions. [2021-11-03 23:27:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 23:27:35,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:35,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:35,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 23:27:35,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash 348905751, now seen corresponding path program 1 times [2021-11-03 23:27:35,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:35,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134896983] [2021-11-03 23:27:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:35,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:35,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:35,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134896983] [2021-11-03 23:27:35,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134896983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:35,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:35,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:27:35,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822434943] [2021-11-03 23:27:35,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:35,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:27:35,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:27:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:27:35,348 INFO L87 Difference]: Start difference. First operand 125 states and 169 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:35,558 INFO L93 Difference]: Finished difference Result 230 states and 314 transitions. [2021-11-03 23:27:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 23:27:35,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 23:27:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:35,559 INFO L225 Difference]: With dead ends: 230 [2021-11-03 23:27:35,559 INFO L226 Difference]: Without dead ends: 119 [2021-11-03 23:27:35,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.66ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:27:35,560 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.56ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:35,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 304 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [7 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 198.56ms Time] [2021-11-03 23:27:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-03 23:27:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-03 23:27:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.391304347826087) internal successors, (160), 118 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2021-11-03 23:27:35,566 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 41 [2021-11-03 23:27:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:35,566 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2021-11-03 23:27:35,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2021-11-03 23:27:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 23:27:35,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:35,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:35,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 23:27:35,568 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:35,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1666510959, now seen corresponding path program 1 times [2021-11-03 23:27:35,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:35,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953468046] [2021-11-03 23:27:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:35,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:35,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:35,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953468046] [2021-11-03 23:27:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953468046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:35,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:35,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:27:35,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703704350] [2021-11-03 23:27:35,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:35,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:27:35,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:27:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:27:35,639 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:35,890 INFO L93 Difference]: Finished difference Result 228 states and 298 transitions. [2021-11-03 23:27:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 23:27:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 23:27:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:35,892 INFO L225 Difference]: With dead ends: 228 [2021-11-03 23:27:35,892 INFO L226 Difference]: Without dead ends: 137 [2021-11-03 23:27:35,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.28ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:27:35,893 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 236.30ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:35,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 451 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [5 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 236.30ms Time] [2021-11-03 23:27:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-03 23:27:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2021-11-03 23:27:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.373913043478261) internal successors, (158), 118 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-11-03 23:27:35,899 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 41 [2021-11-03 23:27:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:35,899 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-11-03 23:27:35,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-11-03 23:27:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 23:27:35,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:35,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:35,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 23:27:35,901 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash -423042159, now seen corresponding path program 1 times [2021-11-03 23:27:35,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:35,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702239461] [2021-11-03 23:27:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:35,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:35,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:35,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702239461] [2021-11-03 23:27:35,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702239461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:35,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:35,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 23:27:35,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059489486] [2021-11-03 23:27:35,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:35,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 23:27:35,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 23:27:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 23:27:35,985 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:36,248 INFO L93 Difference]: Finished difference Result 242 states and 315 transitions. [2021-11-03 23:27:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 23:27:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 23:27:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:36,249 INFO L225 Difference]: With dead ends: 242 [2021-11-03 23:27:36,249 INFO L226 Difference]: Without dead ends: 152 [2021-11-03 23:27:36,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.06ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:27:36,250 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 458 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.34ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:36,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [30 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 210.34ms Time] [2021-11-03 23:27:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-03 23:27:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2021-11-03 23:27:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.3478260869565217) internal successors, (155), 118 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2021-11-03 23:27:36,256 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 45 [2021-11-03 23:27:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:36,256 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2021-11-03 23:27:36,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2021-11-03 23:27:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-03 23:27:36,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:36,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:36,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 23:27:36,258 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:36,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2072078671, now seen corresponding path program 1 times [2021-11-03 23:27:36,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:36,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762873372] [2021-11-03 23:27:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:36,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:36,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:36,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762873372] [2021-11-03 23:27:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762873372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:36,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:36,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 23:27:36,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446085643] [2021-11-03 23:27:36,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:36,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 23:27:36,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 23:27:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 23:27:36,350 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-11-03 23:27:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:36,768 INFO L93 Difference]: Finished difference Result 334 states and 430 transitions. [2021-11-03 23:27:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 23:27:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 [2021-11-03 23:27:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:36,769 INFO L225 Difference]: With dead ends: 334 [2021-11-03 23:27:36,770 INFO L226 Difference]: Without dead ends: 243 [2021-11-03 23:27:36,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 73.23ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-03 23:27:36,771 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 819 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 278.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 341.78ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:36,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 0 Invalid, 526 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [63 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 341.78ms Time] [2021-11-03 23:27:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-03 23:27:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 122. [2021-11-03 23:27:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 121 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2021-11-03 23:27:36,779 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 49 [2021-11-03 23:27:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:36,780 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2021-11-03 23:27:36,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-11-03 23:27:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2021-11-03 23:27:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 23:27:36,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:36,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:36,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 23:27:36,781 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1006498608, now seen corresponding path program 1 times [2021-11-03 23:27:36,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:36,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729758712] [2021-11-03 23:27:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:36,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:36,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:36,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729758712] [2021-11-03 23:27:36,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729758712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:36,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:36,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 23:27:36,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357360493] [2021-11-03 23:27:36,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:36,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 23:27:36,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:36,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 23:27:36,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 23:27:36,876 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2021-11-03 23:27:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:37,237 INFO L93 Difference]: Finished difference Result 327 states and 416 transitions. [2021-11-03 23:27:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 23:27:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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 [2021-11-03 23:27:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:37,239 INFO L225 Difference]: With dead ends: 327 [2021-11-03 23:27:37,239 INFO L226 Difference]: Without dead ends: 234 [2021-11-03 23:27:37,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.24ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:27:37,241 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 701 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 301.94ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:37,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 0 Invalid, 443 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [40 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 301.94ms Time] [2021-11-03 23:27:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-03 23:27:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 125. [2021-11-03 23:27:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.3305785123966942) internal successors, (161), 124 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2021-11-03 23:27:37,247 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 51 [2021-11-03 23:27:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:37,248 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2021-11-03 23:27:37,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2021-11-03 23:27:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2021-11-03 23:27:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 23:27:37,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:37,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:37,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 23:27:37,257 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1179077135, now seen corresponding path program 1 times [2021-11-03 23:27:37,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:37,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210013384] [2021-11-03 23:27:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:37,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:37,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:37,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210013384] [2021-11-03 23:27:37,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210013384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:37,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:37,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:27:37,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884660506] [2021-11-03 23:27:37,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:37,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:27:37,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:27:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:27:37,351 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:37,582 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2021-11-03 23:27:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:27:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 23:27:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:37,584 INFO L225 Difference]: With dead ends: 244 [2021-11-03 23:27:37,584 INFO L226 Difference]: Without dead ends: 141 [2021-11-03 23:27:37,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.27ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:27:37,585 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.84ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:37,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 464 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [13 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 215.84ms Time] [2021-11-03 23:27:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-03 23:27:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-11-03 23:27:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.310077519379845) internal successors, (169), 132 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2021-11-03 23:27:37,590 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 61 [2021-11-03 23:27:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:37,590 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2021-11-03 23:27:37,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2021-11-03 23:27:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 23:27:37,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:37,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:37,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 23:27:37,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -192730163, now seen corresponding path program 1 times [2021-11-03 23:27:37,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:37,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085427897] [2021-11-03 23:27:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:37,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:37,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:37,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085427897] [2021-11-03 23:27:37,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085427897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:37,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:37,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 23:27:37,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369173066] [2021-11-03 23:27:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:37,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 23:27:37,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 23:27:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 23:27:37,699 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:38,193 INFO L93 Difference]: Finished difference Result 362 states and 457 transitions. [2021-11-03 23:27:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 23:27:38,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 23:27:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:38,195 INFO L225 Difference]: With dead ends: 362 [2021-11-03 23:27:38,195 INFO L226 Difference]: Without dead ends: 251 [2021-11-03 23:27:38,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 93.08ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-03 23:27:38,197 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 761 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 397.76ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:38,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 0 Invalid, 703 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [80 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 397.76ms Time] [2021-11-03 23:27:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-03 23:27:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 136. [2021-11-03 23:27:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.303030303030303) internal successors, (172), 135 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2021-11-03 23:27:38,202 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 61 [2021-11-03 23:27:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:38,203 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2021-11-03 23:27:38,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2021-11-03 23:27:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 23:27:38,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:38,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:38,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 23:27:38,204 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash 930930641, now seen corresponding path program 1 times [2021-11-03 23:27:38,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:38,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508827778] [2021-11-03 23:27:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:38,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:38,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:38,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508827778] [2021-11-03 23:27:38,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508827778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:38,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:38,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 23:27:38,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666482862] [2021-11-03 23:27:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:38,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 23:27:38,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 23:27:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:27:38,266 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:38,598 INFO L93 Difference]: Finished difference Result 289 states and 354 transitions. [2021-11-03 23:27:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 23:27:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 23:27:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:38,600 INFO L225 Difference]: With dead ends: 289 [2021-11-03 23:27:38,600 INFO L226 Difference]: Without dead ends: 184 [2021-11-03 23:27:38,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.58ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 23:27:38,601 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 310.13ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:38,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 655 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [11 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 310.13ms Time] [2021-11-03 23:27:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-03 23:27:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 136. [2021-11-03 23:27:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.2878787878787878) internal successors, (170), 135 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 170 transitions. [2021-11-03 23:27:38,606 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 170 transitions. Word has length 61 [2021-11-03 23:27:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:38,607 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 170 transitions. [2021-11-03 23:27:38,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 170 transitions. [2021-11-03 23:27:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 23:27:38,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:38,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:38,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 23:27:38,608 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -961072015, now seen corresponding path program 1 times [2021-11-03 23:27:38,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:38,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736721527] [2021-11-03 23:27:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:38,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:27:38,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:38,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736721527] [2021-11-03 23:27:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736721527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:27:38,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016554509] [2021-11-03 23:27:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:38,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:27:38,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:27:38,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:27:38,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 23:27:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-03 23:27:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:27:39,095 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:27:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 23:27:39,119 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 23:27:39,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 23:27:40,228 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-03 23:27:40,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 89 [2021-11-03 23:27:40,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:27:40,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 89 [2021-11-03 23:27:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:27:40,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:27:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:27:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016554509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:27:40,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:27:40,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2021-11-03 23:27:40,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784619752] [2021-11-03 23:27:40,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:27:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-03 23:27:40,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-03 23:27:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-03 23:27:40,580 INFO L87 Difference]: Start difference. First operand 136 states and 170 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:41,779 INFO L93 Difference]: Finished difference Result 599 states and 730 transitions. [2021-11-03 23:27:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-03 23:27:41,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 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 65 [2021-11-03 23:27:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:41,782 INFO L225 Difference]: With dead ends: 599 [2021-11-03 23:27:41,782 INFO L226 Difference]: Without dead ends: 496 [2021-11-03 23:27:41,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 619.03ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-11-03 23:27:41,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 797 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 658.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.26ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1974 IncrementalHoareTripleChecker+Unchecked, 804.22ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:41,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 0 Invalid, 3252 Unknown, 0 Unchecked, 9.26ms Time], IncrementalHoareTripleChecker [65 Valid, 1213 Invalid, 0 Unknown, 1974 Unchecked, 804.22ms Time] [2021-11-03 23:27:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-03 23:27:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 190. [2021-11-03 23:27:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.2849462365591398) internal successors, (239), 189 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 239 transitions. [2021-11-03 23:27:41,794 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 239 transitions. Word has length 65 [2021-11-03 23:27:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:41,794 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 239 transitions. [2021-11-03 23:27:41,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 239 transitions. [2021-11-03 23:27:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 23:27:41,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:41,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:41,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 23:27:42,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-03 23:27:42,020 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1581899307, now seen corresponding path program 1 times [2021-11-03 23:27:42,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:42,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235165181] [2021-11-03 23:27:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:42,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:27:42,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:42,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235165181] [2021-11-03 23:27:42,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235165181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:27:42,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030785320] [2021-11-03 23:27:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:42,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:27:42,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:27:42,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:27:42,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 23:27:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:42,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 23:27:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:27:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:27:42,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-03 23:27:42,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030785320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:42,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 23:27:42,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-03 23:27:42,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058458850] [2021-11-03 23:27:42,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:42,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:27:42,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:27:42,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-03 23:27:42,394 INFO L87 Difference]: Start difference. First operand 190 states and 239 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:42,639 INFO L93 Difference]: Finished difference Result 349 states and 447 transitions. [2021-11-03 23:27:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:27:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-03 23:27:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:42,640 INFO L225 Difference]: With dead ends: 349 [2021-11-03 23:27:42,640 INFO L226 Difference]: Without dead ends: 175 [2021-11-03 23:27:42,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.75ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:27:42,642 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.63ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:42,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 455 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [17 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 226.63ms Time] [2021-11-03 23:27:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-03 23:27:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 167. [2021-11-03 23:27:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.2453987730061349) internal successors, (203), 166 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 203 transitions. [2021-11-03 23:27:42,650 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 203 transitions. Word has length 65 [2021-11-03 23:27:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:42,651 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 203 transitions. [2021-11-03 23:27:42,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 203 transitions. [2021-11-03 23:27:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 23:27:42,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:42,654 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:27:42,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-03 23:27:42,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-03 23:27:42,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash 802367164, now seen corresponding path program 1 times [2021-11-03 23:27:42,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:42,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412734174] [2021-11-03 23:27:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:42,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:27:42,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:42,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412734174] [2021-11-03 23:27:42,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412734174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:27:42,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623792574] [2021-11-03 23:27:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:42,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:27:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:27:42,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:27:43,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 23:27:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:43,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-03 23:27:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:27:43,177 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:27:43,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 23:27:44,125 INFO L354 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2021-11-03 23:27:44,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-11-03 23:27:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:27:44,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 333 [2021-11-03 23:27:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:27:44,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623792574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:27:44,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:27:44,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 14] total 33 [2021-11-03 23:27:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731173005] [2021-11-03 23:27:44,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:27:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-03 23:27:44,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-03 23:27:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 23:27:44,907 INFO L87 Difference]: Start difference. First operand 167 states and 203 transitions. Second operand has 33 states, 33 states have (on average 4.9393939393939394) internal successors, (163), 33 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:46,632 INFO L93 Difference]: Finished difference Result 455 states and 530 transitions. [2021-11-03 23:27:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-03 23:27:46,633 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.9393939393939394) internal successors, (163), 33 states have internal predecessors, (163), 0 states have call successors, (0), 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 66 [2021-11-03 23:27:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:46,634 INFO L225 Difference]: With dead ends: 455 [2021-11-03 23:27:46,634 INFO L226 Difference]: Without dead ends: 325 [2021-11-03 23:27:46,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1304.05ms TimeCoverageRelationStatistics Valid=336, Invalid=2744, Unknown=0, NotChecked=0, Total=3080 [2021-11-03 23:27:46,636 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 789 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 787.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.45ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 806 IncrementalHoareTripleChecker+Unchecked, 957.30ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:46,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 0 Invalid, 2678 Unknown, 0 Unchecked, 8.45ms Time], IncrementalHoareTripleChecker [78 Valid, 1794 Invalid, 0 Unknown, 806 Unchecked, 957.30ms Time] [2021-11-03 23:27:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-03 23:27:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 167. [2021-11-03 23:27:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.2453987730061349) internal successors, (203), 166 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 203 transitions. [2021-11-03 23:27:46,644 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 203 transitions. Word has length 66 [2021-11-03 23:27:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:46,645 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 203 transitions. [2021-11-03 23:27:46,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.9393939393939394) internal successors, (163), 33 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 203 transitions. [2021-11-03 23:27:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 23:27:46,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:46,645 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:27:46,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-03 23:27:46,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:27:46,867 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1164925684, now seen corresponding path program 1 times [2021-11-03 23:27:46,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:46,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879382365] [2021-11-03 23:27:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:46,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 23:27:47,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:47,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879382365] [2021-11-03 23:27:47,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879382365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:47,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:47,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 23:27:47,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576694303] [2021-11-03 23:27:47,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:47,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 23:27:47,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 23:27:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 23:27:47,167 INFO L87 Difference]: Start difference. First operand 167 states and 203 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:47,622 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2021-11-03 23:27:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 23:27:47,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 23:27:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:47,623 INFO L225 Difference]: With dead ends: 220 [2021-11-03 23:27:47,623 INFO L226 Difference]: Without dead ends: 167 [2021-11-03 23:27:47,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 191.64ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-03 23:27:47,624 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 351 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 243.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.32ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:47,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 0 Invalid, 550 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [18 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 292.32ms Time] [2021-11-03 23:27:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-03 23:27:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-03 23:27:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.2392638036809815) internal successors, (202), 166 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2021-11-03 23:27:47,635 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 67 [2021-11-03 23:27:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:47,635 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2021-11-03 23:27:47,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2021-11-03 23:27:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 23:27:47,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:47,636 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:27:47,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 23:27:47,636 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1166772726, now seen corresponding path program 1 times [2021-11-03 23:27:47,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:47,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777213268] [2021-11-03 23:27:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:47,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 23:27:47,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:47,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777213268] [2021-11-03 23:27:47,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777213268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:47,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:47,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-03 23:27:47,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487049393] [2021-11-03 23:27:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:47,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 23:27:47,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 23:27:47,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:27:47,872 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:48,683 INFO L93 Difference]: Finished difference Result 387 states and 467 transitions. [2021-11-03 23:27:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 23:27:48,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 23:27:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:48,685 INFO L225 Difference]: With dead ends: 387 [2021-11-03 23:27:48,685 INFO L226 Difference]: Without dead ends: 333 [2021-11-03 23:27:48,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 163.00ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-03 23:27:48,686 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 677 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 563.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 674.03ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:48,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 0 Invalid, 1319 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [51 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 674.03ms Time] [2021-11-03 23:27:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-03 23:27:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 290. [2021-11-03 23:27:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.2377622377622377) internal successors, (354), 289 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 354 transitions. [2021-11-03 23:27:48,706 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 354 transitions. Word has length 67 [2021-11-03 23:27:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:48,707 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 354 transitions. [2021-11-03 23:27:48,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 354 transitions. [2021-11-03 23:27:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 23:27:48,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:48,708 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:27:48,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 23:27:48,708 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1353187208, now seen corresponding path program 1 times [2021-11-03 23:27:48,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:48,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431248937] [2021-11-03 23:27:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:48,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 23:27:48,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:48,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431248937] [2021-11-03 23:27:48,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431248937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:27:48,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:27:48,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-03 23:27:48,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712454696] [2021-11-03 23:27:48,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:27:48,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 23:27:48,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:27:48,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 23:27:48,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-03 23:27:48,975 INFO L87 Difference]: Start difference. First operand 290 states and 354 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:27:49,617 INFO L93 Difference]: Finished difference Result 366 states and 445 transitions. [2021-11-03 23:27:49,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 23:27:49,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 23:27:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:27:49,621 INFO L225 Difference]: With dead ends: 366 [2021-11-03 23:27:49,621 INFO L226 Difference]: Without dead ends: 292 [2021-11-03 23:27:49,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 336.71ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-11-03 23:27:49,622 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 349 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 303.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.36ms IncrementalHoareTripleChecker+Time [2021-11-03 23:27:49,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 0 Invalid, 688 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [39 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 362.36ms Time] [2021-11-03 23:27:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-03 23:27:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2021-11-03 23:27:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.2237762237762237) internal successors, (350), 289 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 350 transitions. [2021-11-03 23:27:49,649 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 350 transitions. Word has length 67 [2021-11-03 23:27:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:27:49,649 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 350 transitions. [2021-11-03 23:27:49,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:27:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 350 transitions. [2021-11-03 23:27:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 23:27:49,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:27:49,650 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:27:49,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 23:27:49,651 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:27:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:27:49,651 INFO L85 PathProgramCache]: Analyzing trace with hash -673128838, now seen corresponding path program 1 times [2021-11-03 23:27:49,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:27:49,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65639031] [2021-11-03 23:27:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:49,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:27:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:27:49,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:27:49,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65639031] [2021-11-03 23:27:49,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65639031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:27:49,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942770524] [2021-11-03 23:27:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:27:49,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:27:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:27:49,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:27:49,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 23:27:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:27:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-03 23:27:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:27:49,996 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 23:27:49,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-03 23:28:10,077 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:28:22,152 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:28:34,283 WARN L210 SmtUtils]: Spent 9.95s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:28:42,993 WARN L210 SmtUtils]: Spent 8.66s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:28:53,215 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-03 23:29:03,292 WARN L210 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-03 23:29:13,418 WARN L210 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:29:21,606 WARN L210 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:29:29,887 WARN L210 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:29:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:29:29,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:29:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-03 23:29:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:29:30,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942770524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:29:30,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:29:30,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2021-11-03 23:29:30,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376169568] [2021-11-03 23:29:30,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:29:30,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 23:29:30,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:29:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 23:29:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=685, Unknown=7, NotChecked=0, Total=812 [2021-11-03 23:29:30,315 INFO L87 Difference]: Start difference. First operand 290 states and 350 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:29:39,652 WARN L210 SmtUtils]: Spent 9.27s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:29:59,420 WARN L210 SmtUtils]: Spent 19.74s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-11-03 23:29:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:29:59,651 INFO L93 Difference]: Finished difference Result 397 states and 473 transitions. [2021-11-03 23:29:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 23:29:59,651 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 23:29:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:29:59,652 INFO L225 Difference]: With dead ends: 397 [2021-11-03 23:29:59,652 INFO L226 Difference]: Without dead ends: 339 [2021-11-03 23:29:59,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 128378.15ms TimeCoverageRelationStatistics Valid=145, Invalid=840, Unknown=7, NotChecked=0, Total=992 [2021-11-03 23:29:59,654 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 250.91ms IncrementalHoareTripleChecker+Time [2021-11-03 23:29:59,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 818 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [1 Valid, 509 Invalid, 0 Unknown, 308 Unchecked, 250.91ms Time] [2021-11-03 23:29:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-03 23:29:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 334. [2021-11-03 23:29:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.215151515151515) internal successors, (401), 333 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:29:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 401 transitions. [2021-11-03 23:29:59,673 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 401 transitions. Word has length 67 [2021-11-03 23:29:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:29:59,673 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 401 transitions. [2021-11-03 23:29:59,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:29:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 401 transitions. [2021-11-03 23:29:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 23:29:59,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:29:59,674 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:29:59,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-03 23:29:59,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-03 23:29:59,887 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:29:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:29:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash 27935740, now seen corresponding path program 1 times [2021-11-03 23:29:59,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:29:59,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840415787] [2021-11-03 23:29:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:29:59,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:29:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:29:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 23:29:59,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:29:59,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840415787] [2021-11-03 23:29:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840415787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:29:59,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:29:59,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 23:29:59,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325243072] [2021-11-03 23:29:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:29:59,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 23:29:59,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:29:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 23:29:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 23:29:59,976 INFO L87 Difference]: Start difference. First operand 334 states and 401 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:30:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:30:00,210 INFO L93 Difference]: Finished difference Result 412 states and 492 transitions. [2021-11-03 23:30:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 23:30:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 23:30:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:30:00,212 INFO L225 Difference]: With dead ends: 412 [2021-11-03 23:30:00,212 INFO L226 Difference]: Without dead ends: 330 [2021-11-03 23:30:00,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.44ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:30:00,213 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 439 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.79ms IncrementalHoareTripleChecker+Time [2021-11-03 23:30:00,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 0 Invalid, 323 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [18 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 188.79ms Time] [2021-11-03 23:30:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-03 23:30:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-11-03 23:30:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 326 states have (on average 1.2085889570552146) internal successors, (394), 329 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:30:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 394 transitions. [2021-11-03 23:30:00,231 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 394 transitions. Word has length 67 [2021-11-03 23:30:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:30:00,231 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 394 transitions. [2021-11-03 23:30:00,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:30:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 394 transitions. [2021-11-03 23:30:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 23:30:00,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:30:00,232 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:30:00,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 23:30:00,233 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:30:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:30:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -454274120, now seen corresponding path program 1 times [2021-11-03 23:30:00,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:30:00,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454995526] [2021-11-03 23:30:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:30:00,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:30:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:30:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:30:00,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:30:00,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454995526] [2021-11-03 23:30:00,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454995526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:30:00,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414679910] [2021-11-03 23:30:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:30:00,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:30:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:30:00,454 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:30:00,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 23:30:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:30:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-03 23:30:00,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:30:00,636 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 23:30:00,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-03 23:30:14,686 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:30:24,650 WARN L210 SmtUtils]: Spent 9.91s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:30:34,842 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:30:44,937 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:30:54,818 WARN L210 SmtUtils]: Spent 9.70s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-03 23:31:02,906 WARN L210 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-03 23:31:13,044 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:31:21,232 WARN L210 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:31:29,263 WARN L210 SmtUtils]: Spent 7.95s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:31:37,375 WARN L210 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:31:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:31:37,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:31:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-03 23:31:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:31:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414679910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:31:38,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:31:38,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2021-11-03 23:31:38,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388020055] [2021-11-03 23:31:38,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:31:38,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-03 23:31:38,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:31:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-03 23:31:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1210, Unknown=2, NotChecked=0, Total=1332 [2021-11-03 23:31:38,005 INFO L87 Difference]: Start difference. First operand 330 states and 394 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:31:58,268 WARN L210 SmtUtils]: Spent 20.11s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-11-03 23:32:08,321 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:32:18,252 WARN L210 SmtUtils]: Spent 9.90s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:32:38,189 WARN L210 SmtUtils]: Spent 19.91s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-11-03 23:32:48,239 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-03 23:32:58,035 WARN L210 SmtUtils]: Spent 9.76s on a formula simplification that was a NOOP. DAG size: 29 [2021-11-03 23:33:07,289 WARN L210 SmtUtils]: Spent 9.22s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-03 23:33:15,340 WARN L210 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-03 23:33:23,466 WARN L210 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-03 23:33:31,516 WARN L210 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-03 23:33:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:33:32,179 INFO L93 Difference]: Finished difference Result 439 states and 526 transitions. [2021-11-03 23:33:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 23:33:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 23:33:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:33:32,181 INFO L225 Difference]: With dead ends: 439 [2021-11-03 23:33:32,181 INFO L226 Difference]: Without dead ends: 330 [2021-11-03 23:33:32,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 209967.06ms TimeCoverageRelationStatistics Valid=205, Invalid=2049, Unknown=2, NotChecked=0, Total=2256 [2021-11-03 23:33:32,183 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 625.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.72ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 750.52ms IncrementalHoareTripleChecker+Time [2021-11-03 23:33:32,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 2409 Unknown, 0 Unchecked, 3.72ms Time], IncrementalHoareTripleChecker [1 Valid, 1874 Invalid, 0 Unknown, 534 Unchecked, 750.52ms Time] [2021-11-03 23:33:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-03 23:33:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-11-03 23:33:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 326 states have (on average 1.205521472392638) internal successors, (393), 329 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:33:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 393 transitions. [2021-11-03 23:33:32,211 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 393 transitions. Word has length 67 [2021-11-03 23:33:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:33:32,211 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 393 transitions. [2021-11-03 23:33:32,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:33:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 393 transitions. [2021-11-03 23:33:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 23:33:32,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:33:32,214 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:33:32,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 23:33:32,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:33:32,419 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:33:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:33:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1255143864, now seen corresponding path program 1 times [2021-11-03 23:33:32,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:33:32,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221337645] [2021-11-03 23:33:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:33:32,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:33:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:33:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:33:32,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:33:32,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221337645] [2021-11-03 23:33:32,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221337645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:33:32,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600564909] [2021-11-03 23:33:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:33:32,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:33:32,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:33:32,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:33:32,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 23:33:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:33:32,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-03 23:33:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:33:32,778 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 23:33:32,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-03 23:33:46,771 WARN L210 SmtUtils]: Spent 9.95s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:33:56,822 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:34:06,948 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:34:19,066 WARN L210 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:34:31,151 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:34:42,842 WARN L210 SmtUtils]: Spent 9.63s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:34:54,912 WARN L210 SmtUtils]: Spent 9.98s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:34:57,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 23:35:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:35:01,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:35:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-03 23:35:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:35:01,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600564909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:35:01,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:35:01,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2021-11-03 23:35:01,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309958574] [2021-11-03 23:35:01,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:35:01,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-03 23:35:01,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:35:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-03 23:35:01,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=806, Unknown=9, NotChecked=0, Total=930 [2021-11-03 23:35:01,516 INFO L87 Difference]: Start difference. First operand 330 states and 393 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:35:11,659 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:35:21,708 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-03 23:35:31,768 WARN L210 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:35:41,823 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:35:55,845 WARN L210 SmtUtils]: Spent 9.98s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-03 23:36:08,063 WARN L210 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 30 [2021-11-03 23:36:18,254 WARN L210 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-03 23:36:30,304 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-03 23:36:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:36:37,158 INFO L93 Difference]: Finished difference Result 647 states and 772 transitions. [2021-11-03 23:36:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 23:36:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 23:36:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:36:37,160 INFO L225 Difference]: With dead ends: 647 [2021-11-03 23:36:37,160 INFO L226 Difference]: Without dead ends: 429 [2021-11-03 23:36:37,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 183023.29ms TimeCoverageRelationStatistics Valid=206, Invalid=1416, Unknown=18, NotChecked=0, Total=1640 [2021-11-03 23:36:37,162 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 708.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 856.71ms IncrementalHoareTripleChecker+Time [2021-11-03 23:36:37,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 2378 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [7 Valid, 2146 Invalid, 0 Unknown, 225 Unchecked, 856.71ms Time] [2021-11-03 23:36:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-03 23:36:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 352. [2021-11-03 23:36:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 348 states have (on average 1.2040229885057472) internal successors, (419), 351 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 419 transitions. [2021-11-03 23:36:37,183 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 419 transitions. Word has length 67 [2021-11-03 23:36:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:36:37,183 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 419 transitions. [2021-11-03 23:36:37,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 419 transitions. [2021-11-03 23:36:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 23:36:37,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:36:37,185 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:36:37,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 23:36:37,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:36:37,400 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:36:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:36:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1384277337, now seen corresponding path program 1 times [2021-11-03 23:36:37,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:36:37,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721698166] [2021-11-03 23:36:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:36:37,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:36:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:36:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 23:36:37,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:36:37,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721698166] [2021-11-03 23:36:37,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721698166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:36:37,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:36:37,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 23:36:37,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502541700] [2021-11-03 23:36:37,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:36:37,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 23:36:37,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:36:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 23:36:37,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 23:36:37,563 INFO L87 Difference]: Start difference. First operand 352 states and 419 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:36:37,787 INFO L93 Difference]: Finished difference Result 422 states and 502 transitions. [2021-11-03 23:36:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 23:36:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 23:36:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:36:37,791 INFO L225 Difference]: With dead ends: 422 [2021-11-03 23:36:37,791 INFO L226 Difference]: Without dead ends: 352 [2021-11-03 23:36:37,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.31ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-03 23:36:37,793 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 649 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.78ms IncrementalHoareTripleChecker+Time [2021-11-03 23:36:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 0 Invalid, 234 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [36 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 172.78ms Time] [2021-11-03 23:36:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-03 23:36:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-03 23:36:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 348 states have (on average 1.1982758620689655) internal successors, (417), 351 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 417 transitions. [2021-11-03 23:36:37,819 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 417 transitions. Word has length 69 [2021-11-03 23:36:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:36:37,819 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 417 transitions. [2021-11-03 23:36:37,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 417 transitions. [2021-11-03 23:36:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 23:36:37,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:36:37,821 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:36:37,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 23:36:37,821 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:36:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:36:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash 80619544, now seen corresponding path program 1 times [2021-11-03 23:36:37,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:36:37,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365901051] [2021-11-03 23:36:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:36:37,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:36:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:36:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:36:38,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:36:38,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365901051] [2021-11-03 23:36:38,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365901051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:36:38,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154734578] [2021-11-03 23:36:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:36:38,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:36:38,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:36:38,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:36:38,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 23:36:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:36:38,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 23:36:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:36:38,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:36:38,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:36:38,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-03 23:36:38,402 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-03 23:36:38,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 54 [2021-11-03 23:36:39,111 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-11-03 23:36:39,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 36 [2021-11-03 23:36:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:36:39,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:36:42,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 842 treesize of output 834 [2021-11-03 23:36:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:36:42,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154734578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:36:42,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:36:42,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-03 23:36:42,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825902547] [2021-11-03 23:36:42,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:36:42,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-03 23:36:42,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:36:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-03 23:36:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-03 23:36:42,923 INFO L87 Difference]: Start difference. First operand 352 states and 417 transitions. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:36:44,504 INFO L93 Difference]: Finished difference Result 624 states and 728 transitions. [2021-11-03 23:36:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 23:36:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 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 69 [2021-11-03 23:36:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:36:44,506 INFO L225 Difference]: With dead ends: 624 [2021-11-03 23:36:44,506 INFO L226 Difference]: Without dead ends: 496 [2021-11-03 23:36:44,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3808.69ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-11-03 23:36:44,508 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1164 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 960.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.79ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 1155.19ms IncrementalHoareTripleChecker+Time [2021-11-03 23:36:44,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1164 Valid, 0 Invalid, 3010 Unknown, 0 Unchecked, 8.79ms Time], IncrementalHoareTripleChecker [54 Valid, 2235 Invalid, 0 Unknown, 721 Unchecked, 1155.19ms Time] [2021-11-03 23:36:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-03 23:36:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 352. [2021-11-03 23:36:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 348 states have (on average 1.1982758620689655) internal successors, (417), 351 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 417 transitions. [2021-11-03 23:36:44,533 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 417 transitions. Word has length 69 [2021-11-03 23:36:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:36:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 417 transitions. [2021-11-03 23:36:44,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 417 transitions. [2021-11-03 23:36:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 23:36:44,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:36:44,535 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:36:44,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 23:36:44,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:36:44,744 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:36:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:36:44,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1205176043, now seen corresponding path program 1 times [2021-11-03 23:36:44,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:36:44,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236465526] [2021-11-03 23:36:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:36:44,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:36:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:36:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 23:36:44,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:36:44,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236465526] [2021-11-03 23:36:44,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236465526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:36:44,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:36:44,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 23:36:44,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149871399] [2021-11-03 23:36:44,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:36:44,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 23:36:44,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:36:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 23:36:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 23:36:44,937 INFO L87 Difference]: Start difference. First operand 352 states and 417 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:36:45,691 INFO L93 Difference]: Finished difference Result 830 states and 971 transitions. [2021-11-03 23:36:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 23:36:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 23:36:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:36:45,694 INFO L225 Difference]: With dead ends: 830 [2021-11-03 23:36:45,694 INFO L226 Difference]: Without dead ends: 612 [2021-11-03 23:36:45,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.50ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:36:45,695 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 330 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 496.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 596.26ms IncrementalHoareTripleChecker+Time [2021-11-03 23:36:45,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 0 Invalid, 1032 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [54 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 596.26ms Time] [2021-11-03 23:36:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-03 23:36:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 356. [2021-11-03 23:36:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 352 states have (on average 1.1931818181818181) internal successors, (420), 355 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 420 transitions. [2021-11-03 23:36:45,730 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 420 transitions. Word has length 74 [2021-11-03 23:36:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:36:45,731 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 420 transitions. [2021-11-03 23:36:45,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:36:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 420 transitions. [2021-11-03 23:36:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 23:36:45,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:36:45,732 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:36:45,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-03 23:36:45,733 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:36:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:36:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1627877869, now seen corresponding path program 1 times [2021-11-03 23:36:45,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:36:45,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766466530] [2021-11-03 23:36:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:36:45,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:36:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:36:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:36:45,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:36:45,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766466530] [2021-11-03 23:36:45,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766466530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:36:45,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534142355] [2021-11-03 23:36:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:36:45,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:36:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:36:45,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:36:45,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 23:36:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:36:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-03 23:36:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:36:46,116 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 23:36:46,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-03 23:37:06,197 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:37:18,289 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:37:30,460 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:37:40,535 WARN L210 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:37:50,757 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-03 23:37:56,839 WARN L210 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-03 23:38:05,016 WARN L210 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:38:11,722 WARN L210 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:38:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:38:11,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:38:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-03 23:38:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:38:12,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534142355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:38:12,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:38:12,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2021-11-03 23:38:12,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427026726] [2021-11-03 23:38:12,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:38:12,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-03 23:38:12,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:38:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-03 23:38:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=633, Unknown=7, NotChecked=0, Total=756 [2021-11-03 23:38:12,126 INFO L87 Difference]: Start difference. First operand 356 states and 420 transitions. Second operand has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:38:21,570 WARN L210 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:38:41,652 WARN L210 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-11-03 23:38:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:38:42,100 INFO L93 Difference]: Finished difference Result 497 states and 583 transitions. [2021-11-03 23:38:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 23:38:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 23:38:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:38:42,103 INFO L225 Difference]: With dead ends: 497 [2021-11-03 23:38:42,103 INFO L226 Difference]: Without dead ends: 439 [2021-11-03 23:38:42,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 114446.28ms TimeCoverageRelationStatistics Valid=141, Invalid=782, Unknown=7, NotChecked=0, Total=930 [2021-11-03 23:38:42,104 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 378.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 456.12ms IncrementalHoareTripleChecker+Time [2021-11-03 23:38:42,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 1245 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [3 Valid, 1031 Invalid, 0 Unknown, 211 Unchecked, 456.12ms Time] [2021-11-03 23:38:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-03 23:38:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 368. [2021-11-03 23:38:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 364 states have (on average 1.1978021978021978) internal successors, (436), 367 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:38:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 436 transitions. [2021-11-03 23:38:42,127 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 436 transitions. Word has length 74 [2021-11-03 23:38:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:38:42,128 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 436 transitions. [2021-11-03 23:38:42,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:38:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 436 transitions. [2021-11-03 23:38:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 23:38:42,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:38:42,129 INFO L514 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] [2021-11-03 23:38:42,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-03 23:38:42,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-03 23:38:42,348 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:38:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:38:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash -177560465, now seen corresponding path program 1 times [2021-11-03 23:38:42,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:38:42,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877003436] [2021-11-03 23:38:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:38:42,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:38:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:38:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 23:38:42,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:38:42,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877003436] [2021-11-03 23:38:42,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877003436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:38:42,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:38:42,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:38:42,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606074282] [2021-11-03 23:38:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:38:42,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:38:42,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:38:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:38:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:38:42,408 INFO L87 Difference]: Start difference. First operand 368 states and 436 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:38:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:38:42,702 INFO L93 Difference]: Finished difference Result 718 states and 845 transitions. [2021-11-03 23:38:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 23:38:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 23:38:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:38:42,705 INFO L225 Difference]: With dead ends: 718 [2021-11-03 23:38:42,705 INFO L226 Difference]: Without dead ends: 472 [2021-11-03 23:38:42,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.84ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:38:42,706 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 251.64ms IncrementalHoareTripleChecker+Time [2021-11-03 23:38:42,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 364 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [17 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 251.64ms Time] [2021-11-03 23:38:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-03 23:38:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 350. [2021-11-03 23:38:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 346 states have (on average 1.170520231213873) internal successors, (405), 349 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:38:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 405 transitions. [2021-11-03 23:38:42,731 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 405 transitions. Word has length 74 [2021-11-03 23:38:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:38:42,731 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 405 transitions. [2021-11-03 23:38:42,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:38:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 405 transitions. [2021-11-03 23:38:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 23:38:42,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:38:42,733 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:38:42,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-03 23:38:42,733 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:38:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:38:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1393591856, now seen corresponding path program 1 times [2021-11-03 23:38:42,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:38:42,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289872246] [2021-11-03 23:38:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:38:42,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:38:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:38:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:38:42,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:38:42,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289872246] [2021-11-03 23:38:42,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289872246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:38:42,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759041077] [2021-11-03 23:38:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:38:42,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:38:42,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:38:42,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:38:42,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 23:38:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:38:43,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-03 23:38:43,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:38:43,093 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:38:43,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 23:38:43,113 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 23:38:43,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 23:38:47,071 INFO L354 Elim1Store]: treesize reduction 48, result has 40.0 percent of original size [2021-11-03 23:38:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 92 [2021-11-03 23:38:47,102 INFO L354 Elim1Store]: treesize reduction 22, result has 64.5 percent of original size [2021-11-03 23:38:47,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 92 [2021-11-03 23:38:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:38:47,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:38:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:38:47,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759041077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:38:47,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:38:47,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 33 [2021-11-03 23:38:47,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891911122] [2021-11-03 23:38:47,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:38:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-03 23:38:47,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:38:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-03 23:38:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 23:38:47,861 INFO L87 Difference]: Start difference. First operand 350 states and 405 transitions. Second operand has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 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) [2021-11-03 23:38:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:38:55,742 INFO L93 Difference]: Finished difference Result 2395 states and 2761 transitions. [2021-11-03 23:38:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-03 23:38:55,742 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 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 74 [2021-11-03 23:38:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:38:55,750 INFO L225 Difference]: With dead ends: 2395 [2021-11-03 23:38:55,751 INFO L226 Difference]: Without dead ends: 2253 [2021-11-03 23:38:55,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 131 SyntacticMatches, 26 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 5852.46ms TimeCoverageRelationStatistics Valid=1378, Invalid=8522, Unknown=0, NotChecked=0, Total=9900 [2021-11-03 23:38:55,755 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1880 mSDsluCounter, 6262 mSDsCounter, 0 mSdLazyCounter, 10035 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3659.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1880 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.63ms SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 10035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 4365.20ms IncrementalHoareTripleChecker+Time [2021-11-03 23:38:55,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1880 Valid, 0 Invalid, 11016 Unknown, 0 Unchecked, 29.63ms Time], IncrementalHoareTripleChecker [158 Valid, 10035 Invalid, 0 Unknown, 823 Unchecked, 4365.20ms Time] [2021-11-03 23:38:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-11-03 23:38:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 619. [2021-11-03 23:38:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 615 states have (on average 1.1495934959349594) internal successors, (707), 618 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:38:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 707 transitions. [2021-11-03 23:38:55,821 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 707 transitions. Word has length 74 [2021-11-03 23:38:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:38:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 707 transitions. [2021-11-03 23:38:55,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.7272727272727275) internal successors, (189), 33 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) [2021-11-03 23:38:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 707 transitions. [2021-11-03 23:38:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 23:38:55,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:38:55,824 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-03 23:38:55,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-03 23:38:56,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-03 23:38:56,032 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-03 23:38:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:38:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1612446574, now seen corresponding path program 1 times [2021-11-03 23:38:56,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:38:56,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26784276] [2021-11-03 23:38:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:38:56,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:38:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:38:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:38:56,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:38:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26784276] [2021-11-03 23:38:56,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26784276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:38:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069416055] [2021-11-03 23:38:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:38:56,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:38:56,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:38:56,182 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:38:56,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 23:38:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:38:56,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-03 23:38:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:38:56,364 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 23:38:56,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-03 23:39:10,412 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:39:20,666 WARN L210 SmtUtils]: Spent 9.95s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:39:30,653 WARN L210 SmtUtils]: Spent 9.90s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-03 23:39:42,046 WARN L210 SmtUtils]: Spent 9.35s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:39:54,147 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:40:04,443 WARN L210 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:40:14,572 WARN L210 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-03 23:40:16,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-03 23:40:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:40:20,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:40:21,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-03 23:40:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:40:21,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069416055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:40:21,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:40:21,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2021-11-03 23:40:21,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745278455] [2021-11-03 23:40:21,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:40:21,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-03 23:40:21,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:40:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-03 23:40:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=866, Unknown=9, NotChecked=0, Total=992 [2021-11-03 23:40:21,197 INFO L87 Difference]: Start difference. First operand 619 states and 707 transitions. Second operand has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:40:35,318 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-03 23:40:47,188 WARN L210 SmtUtils]: Spent 9.85s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-03 23:40:59,229 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-03 23:41:18,603 WARN L210 SmtUtils]: Spent 19.29s on a formula simplification that was a NOOP. DAG size: 36 [2021-11-03 23:41:37,973 WARN L210 SmtUtils]: Spent 19.27s on a formula simplification that was a NOOP. DAG size: 39 Killed by 15