./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_clear_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 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_array_list_clear_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 602c22a5759f33fe3c7a18e3ef1531ea38defb370e298f7d0c16de4a5734f1a7 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 11:46:26,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 11:46:26,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 11:46:26,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 11:46:26,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 11:46:26,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 11:46:26,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 11:46:26,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 11:46:26,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 11:46:26,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 11:46:26,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 11:46:26,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 11:46:26,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 11:46:26,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 11:46:26,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 11:46:26,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 11:46:26,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 11:46:26,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 11:46:26,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 11:46:26,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 11:46:26,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 11:46:26,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 11:46:26,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 11:46:26,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 11:46:26,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 11:46:26,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 11:46:26,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 11:46:26,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 11:46:26,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 11:46:26,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 11:46:26,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 11:46:26,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 11:46:26,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 11:46:26,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 11:46:26,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 11:46:26,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 11:46:26,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 11:46:26,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 11:46:26,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 11:46:26,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 11:46:26,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 11:46:26,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 11:46:26,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 11:46:26,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 11:46:26,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 11:46:26,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 11:46:26,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 11:46:26,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 11:46:26,156 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 11:46:26,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 11:46:26,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 11:46:26,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 11:46:26,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 11:46:26,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 11:46:26,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 11:46:26,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 11:46:26,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 11:46:26,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 11:46:26,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 11:46:26,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 11:46:26,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 11:46:26,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 11:46:26,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 11:46:26,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 11:46:26,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 11:46:26,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 11:46:26,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 11:46:26,159 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 11:46:26,160 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 11:46:26,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 11:46:26,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 11:46:26,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 602c22a5759f33fe3c7a18e3ef1531ea38defb370e298f7d0c16de4a5734f1a7 [2021-11-05 11:46:26,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 11:46:26,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 11:46:26,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 11:46:26,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 11:46:26,422 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 11:46:26,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_clear_harness.i [2021-11-05 11:46:26,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dcd94a45/2408d1889b254854bc635561cbf1c2dd/FLAG00ba2f56f [2021-11-05 11:46:27,006 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 11:46:27,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clear_harness.i [2021-11-05 11:46:27,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dcd94a45/2408d1889b254854bc635561cbf1c2dd/FLAG00ba2f56f [2021-11-05 11:46:27,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dcd94a45/2408d1889b254854bc635561cbf1c2dd [2021-11-05 11:46:27,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 11:46:27,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 11:46:27,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 11:46:27,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 11:46:27,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 11:46:27,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 11:46:27" (1/1) ... [2021-11-05 11:46:27,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ff5441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:27, skipping insertion in model container [2021-11-05 11:46:27,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 11:46:27" (1/1) ... [2021-11-05 11:46:27,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 11:46:27,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 11:46:27,462 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_array_list_clear_harness.i[4494,4507] [2021-11-05 11:46:27,469 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_array_list_clear_harness.i[4554,4567] [2021-11-05 11:46:27,480 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 11:46:27,483 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 11:46:27,911 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 11:46:27,964 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,967 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,967 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,968 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,970 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,984 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,985 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,986 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,986 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,987 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,988 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,989 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:27,990 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,167 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 11:46:28,168 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 11:46:28,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 11:46:28,169 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 11:46:28,170 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 11:46:28,173 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 11:46:28,174 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 11:46:28,174 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 11:46:28,175 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 11:46:28,175 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 11:46:28,229 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,233 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 11:46:28,276 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 11:46:28,284 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_array_list_clear_harness.i[4494,4507] [2021-11-05 11:46:28,284 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_array_list_clear_harness.i[4554,4567] [2021-11-05 11:46:28,285 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-05 11:46:28,286 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-05 11:46:28,301 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-05 11:46:28,309 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,309 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,310 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,310 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,310 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,314 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,314 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,333 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,334 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,334 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,335 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,335 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,335 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,351 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-05 11:46:28,352 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-05 11:46:28,353 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-05 11:46:28,353 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-05 11:46:28,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-05 11:46:28,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-05 11:46:28,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-05 11:46:28,354 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-05 11:46:28,355 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-05 11:46:28,355 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-05 11:46:28,363 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,366 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-05 11:46:28,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 11:46:28,518 INFO L208 MainTranslator]: Completed translation [2021-11-05 11:46:28,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28 WrapperNode [2021-11-05 11:46:28,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 11:46:28,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 11:46:28,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 11:46:28,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 11:46:28,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 11:46:28,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 11:46:28,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 11:46:28,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 11:46:28,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 11:46:28,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 11:46:28,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 11:46:28,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 11:46:28,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (1/1) ... [2021-11-05 11:46:28,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 11:46:28,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:46:28,824 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) [2021-11-05 11:46:28,831 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 [2021-11-05 11:46:28,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 11:46:28,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 11:46:28,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 11:46:28,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 11:46:28,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 11:46:28,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 11:46:28,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 11:46:28,872 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-05 11:46:28,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 11:46:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 11:46:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 11:46:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 11:46:35,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 11:46:35,352 INFO L299 CfgBuilder]: Removed 92 assume(true) statements. [2021-11-05 11:46:35,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 11:46:35 BoogieIcfgContainer [2021-11-05 11:46:35,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 11:46:35,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 11:46:35,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 11:46:35,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 11:46:35,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 11:46:27" (1/3) ... [2021-11-05 11:46:35,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3506ec1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 11:46:35, skipping insertion in model container [2021-11-05 11:46:35,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 11:46:28" (2/3) ... [2021-11-05 11:46:35,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3506ec1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 11:46:35, skipping insertion in model container [2021-11-05 11:46:35,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 11:46:35" (3/3) ... [2021-11-05 11:46:35,358 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clear_harness.i [2021-11-05 11:46:35,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 11:46:35,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-05 11:46:35,389 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 11:46:35,393 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 [2021-11-05 11:46:35,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-05 11:46:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 113 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-05 11:46:35,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:46:35,408 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] [2021-11-05 11:46:35,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:46:35,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:46:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash -787916854, now seen corresponding path program 1 times [2021-11-05 11:46:35,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:46:35,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923979974] [2021-11-05 11:46:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:35,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:46:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:46:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:46:35,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:46:35,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923979974] [2021-11-05 11:46:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923979974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:46:35,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:46:35,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-05 11:46:35,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217177158] [2021-11-05 11:46:35,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:46:35,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-05 11:46:35,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:46:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-05 11:46:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 11:46:35,920 INFO L87 Difference]: Start difference. First operand has 113 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 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 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:46:35,942 INFO L93 Difference]: Finished difference Result 222 states and 291 transitions. [2021-11-05 11:46:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-05 11:46:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-05 11:46:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:46:35,950 INFO L225 Difference]: With dead ends: 222 [2021-11-05 11:46:35,950 INFO L226 Difference]: Without dead ends: 108 [2021-11-05 11:46:35,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 11:46:35,956 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-05 11:46:35,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-05 11:46:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-05 11:46:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-05 11:46:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 101 states have (on average 1.297029702970297) internal successors, (131), 107 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2021-11-05 11:46:35,999 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 25 [2021-11-05 11:46:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:46:35,999 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2021-11-05 11:46:35,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2021-11-05 11:46:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-05 11:46:36,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:46:36,000 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] [2021-11-05 11:46:36,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 11:46:36,001 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:46:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:46:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1180579266, now seen corresponding path program 1 times [2021-11-05 11:46:36,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:46:36,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274215904] [2021-11-05 11:46:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:36,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:46:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:46:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:46:36,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:46:36,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274215904] [2021-11-05 11:46:36,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274215904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:46:36,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:46:36,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 11:46:36,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666286631] [2021-11-05 11:46:36,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:46:36,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 11:46:36,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:46:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 11:46:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 11:46:36,191 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:46:36,229 INFO L93 Difference]: Finished difference Result 203 states and 247 transitions. [2021-11-05 11:46:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 11:46:36,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-05 11:46:36,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:46:36,233 INFO L225 Difference]: With dead ends: 203 [2021-11-05 11:46:36,234 INFO L226 Difference]: Without dead ends: 109 [2021-11-05 11:46:36,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.63ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 11:46:36,235 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.27ms IncrementalHoareTripleChecker+Time [2021-11-05 11:46:36,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 256 Invalid, 5 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 18.27ms Time] [2021-11-05 11:46:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-05 11:46:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-05 11:46:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 102 states have (on average 1.2941176470588236) internal successors, (132), 108 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-11-05 11:46:36,249 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 25 [2021-11-05 11:46:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:46:36,250 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-11-05 11:46:36,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-11-05 11:46:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-05 11:46:36,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:46:36,253 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] [2021-11-05 11:46:36,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 11:46:36,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:46:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:46:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1998227716, now seen corresponding path program 1 times [2021-11-05 11:46:36,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:46:36,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354215224] [2021-11-05 11:46:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:36,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:46:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:46:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:46:36,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:46:36,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354215224] [2021-11-05 11:46:36,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354215224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:46:36,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:46:36,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 11:46:36,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895300793] [2021-11-05 11:46:36,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:46:36,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 11:46:36,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:46:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 11:46:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 11:46:36,478 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:46:36,630 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2021-11-05 11:46:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 11:46:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-05 11:46:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:46:36,632 INFO L225 Difference]: With dead ends: 186 [2021-11-05 11:46:36,632 INFO L226 Difference]: Without dead ends: 109 [2021-11-05 11:46:36,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.62ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 11:46:36,633 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 116 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.52ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.36ms IncrementalHoareTripleChecker+Time [2021-11-05 11:46:36,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 136 Invalid, 41 Unknown, 0 Unchecked, 2.52ms Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 138.36ms Time] [2021-11-05 11:46:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-05 11:46:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-05 11:46:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 108 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2021-11-05 11:46:36,638 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 25 [2021-11-05 11:46:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:46:36,638 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2021-11-05 11:46:36,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2021-11-05 11:46:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 11:46:36,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:46:36,639 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] [2021-11-05 11:46:36,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 11:46:36,639 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:46:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:46:36,640 INFO L85 PathProgramCache]: Analyzing trace with hash -582251314, now seen corresponding path program 1 times [2021-11-05 11:46:36,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:46:36,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522218294] [2021-11-05 11:46:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:36,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:46:36,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:46:36,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635681979] [2021-11-05 11:46:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:36,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:46:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:46:36,731 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) [2021-11-05 11:46:36,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 11:46:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:46:37,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 2458 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 11:46:37,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:46:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:46:37,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:46:37,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:46:37,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522218294] [2021-11-05 11:46:37,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:46:37,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635681979] [2021-11-05 11:46:37,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635681979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:46:37,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:46:37,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 11:46:37,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675067376] [2021-11-05 11:46:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:46:37,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 11:46:37,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:46:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 11:46:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 11:46:37,617 INFO L87 Difference]: Start difference. First operand 109 states and 129 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) [2021-11-05 11:46:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:46:37,840 INFO L93 Difference]: Finished difference Result 207 states and 248 transitions. [2021-11-05 11:46:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 11:46:37,840 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 [2021-11-05 11:46:37,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:46:37,841 INFO L225 Difference]: With dead ends: 207 [2021-11-05 11:46:37,841 INFO L226 Difference]: Without dead ends: 129 [2021-11-05 11:46:37,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.13ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 11:46:37,842 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 31 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.26ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.97ms IncrementalHoareTripleChecker+Time [2021-11-05 11:46:37,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 339 Invalid, 72 Unknown, 0 Unchecked, 2.26ms Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 191.97ms Time] [2021-11-05 11:46:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-05 11:46:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-11-05 11:46:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 116 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2021-11-05 11:46:37,847 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 41 [2021-11-05 11:46:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:46:37,848 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2021-11-05 11:46:37,848 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) [2021-11-05 11:46:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2021-11-05 11:46:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-05 11:46:37,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:46:37,849 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] [2021-11-05 11:46:37,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-05 11:46:38,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:46:38,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:46:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:46:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash 4554700, now seen corresponding path program 1 times [2021-11-05 11:46:38,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:46:38,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297136447] [2021-11-05 11:46:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:38,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:46:38,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:46:38,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390227514] [2021-11-05 11:46:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:38,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:46:38,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:46:38,144 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) [2021-11-05 11:46:38,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 11:46:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:46:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 2463 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-05 11:46:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:46:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:46:39,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:46:39,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:46:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297136447] [2021-11-05 11:46:39,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:46:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390227514] [2021-11-05 11:46:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390227514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:46:39,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:46:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 11:46:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188612381] [2021-11-05 11:46:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:46:39,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 11:46:39,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:46:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 11:46:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-05 11:46:39,151 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-11-05 11:46:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:46:39,444 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2021-11-05 11:46:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 11:46:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 [2021-11-05 11:46:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:46:39,445 INFO L225 Difference]: With dead ends: 162 [2021-11-05 11:46:39,445 INFO L226 Difference]: Without dead ends: 117 [2021-11-05 11:46:39,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 160.86ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-05 11:46:39,446 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 399 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.34ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.06ms IncrementalHoareTripleChecker+Time [2021-11-05 11:46:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 137 Invalid, 62 Unknown, 0 Unchecked, 2.34ms Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 202.06ms Time] [2021-11-05 11:46:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-05 11:46:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-05 11:46:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 116 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2021-11-05 11:46:39,451 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 41 [2021-11-05 11:46:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:46:39,451 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2021-11-05 11:46:39,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-11-05 11:46:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2021-11-05 11:46:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-05 11:46:39,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:46:39,453 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] [2021-11-05 11:46:39,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-05 11:46:39,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:46:39,653 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:46:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:46:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash -594325712, now seen corresponding path program 1 times [2021-11-05 11:46:39,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:46:39,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866956777] [2021-11-05 11:46:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:39,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:46:39,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:46:39,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491071695] [2021-11-05 11:46:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:39,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:46:39,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:46:39,717 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) [2021-11-05 11:46:39,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 11:46:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:46:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-05 11:46:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:46:41,603 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-05 11:46:41,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-11-05 11:46:41,670 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-05 11:46:41,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2021-11-05 11:46:42,172 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 37 treesize of output 25 [2021-11-05 11:46:42,178 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 22 treesize of output 10 [2021-11-05 11:46:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:46:42,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:46:42,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:46:42,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866956777] [2021-11-05 11:46:42,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:46:42,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491071695] [2021-11-05 11:46:42,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491071695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:46:42,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:46:42,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-05 11:46:42,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288718973] [2021-11-05 11:46:42,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:46:42,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-05 11:46:42,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:46:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-05 11:46:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-05 11:46:42,272 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-11-05 11:46:44,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:46:46,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:46:48,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:46:50,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:46:52,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:46:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:46:56,652 INFO L93 Difference]: Finished difference Result 284 states and 328 transitions. [2021-11-05 11:46:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-05 11:46:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 [2021-11-05 11:46:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:46:56,655 INFO L225 Difference]: With dead ends: 284 [2021-11-05 11:46:56,655 INFO L226 Difference]: Without dead ends: 216 [2021-11-05 11:46:56,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2439.10ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-05 11:46:56,656 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 763 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 90 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11628.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.03ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12467.59ms IncrementalHoareTripleChecker+Time [2021-11-05 11:46:56,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 676 Invalid, 636 Unknown, 0 Unchecked, 12.03ms Time], IncrementalHoareTripleChecker [90 Valid, 541 Invalid, 5 Unknown, 0 Unchecked, 12467.59ms Time] [2021-11-05 11:46:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-05 11:46:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2021-11-05 11:46:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 163 states have (on average 1.2147239263803682) internal successors, (198), 169 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:46:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2021-11-05 11:46:56,667 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 49 [2021-11-05 11:46:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:46:56,667 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2021-11-05 11:46:56,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-11-05 11:46:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2021-11-05 11:46:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-05 11:46:56,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:46:56,668 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] [2021-11-05 11:46:56,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 11:46:56,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:46:56,869 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:46:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:46:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1605442962, now seen corresponding path program 1 times [2021-11-05 11:46:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:46:56,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637616172] [2021-11-05 11:46:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:56,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:46:56,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:46:56,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748970147] [2021-11-05 11:46:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:46:56,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:46:56,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:46:56,960 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) [2021-11-05 11:46:56,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-05 11:50:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:50:10,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 209 conjunts are in the unsatisfiable core [2021-11-05 11:50:10,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:50:10,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-05 11:50:11,243 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 9 treesize of output 3 [2021-11-05 11:50:11,258 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 9 treesize of output 3 [2021-11-05 11:50:11,579 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-05 11:50:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 33 [2021-11-05 11:50:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 11:50:11,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2021-11-05 11:50:13,290 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-05 11:50:13,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 172 [2021-11-05 11:50:29,778 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-05 11:50:29,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 81 [2021-11-05 11:50:31,683 INFO L354 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2021-11-05 11:50:31,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 96 [2021-11-05 11:50:33,525 INFO L354 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2021-11-05 11:50:33,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 73 treesize of output 77 [2021-11-05 11:51:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 11:51:01,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 11:51:01,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 11:51:01,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 11:51:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 11:51:01,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-05 11:51:01,969 INFO L354 Elim1Store]: treesize reduction 6, result has 14.3 percent of original size [2021-11-05 11:51:01,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 69 [2021-11-05 11:51:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:51:06,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:51:06,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:51:06,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637616172] [2021-11-05 11:51:06,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:51:06,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748970147] [2021-11-05 11:51:06,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748970147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:51:06,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:51:06,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-05 11:51:06,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712678231] [2021-11-05 11:51:06,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:51:06,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-05 11:51:06,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:51:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-05 11:51:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=720, Unknown=2, NotChecked=0, Total=812 [2021-11-05 11:51:06,109 INFO L87 Difference]: Start difference. First operand 170 states and 198 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2021-11-05 11:51:08,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-05 11:51:10,250 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:12,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-05 11:51:14,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:51:19,944 INFO L93 Difference]: Finished difference Result 275 states and 322 transitions. [2021-11-05 11:51:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-05 11:51:19,945 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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 [2021-11-05 11:51:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:51:19,947 INFO L225 Difference]: With dead ends: 275 [2021-11-05 11:51:19,947 INFO L226 Difference]: Without dead ends: 273 [2021-11-05 11:51:19,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 28781.07ms TimeCoverageRelationStatistics Valid=156, Invalid=1248, Unknown=2, NotChecked=0, Total=1406 [2021-11-05 11:51:19,948 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 146 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 12 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10199.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.55ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 10740.61ms IncrementalHoareTripleChecker+Time [2021-11-05 11:51:19,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1479 Invalid, 812 Unknown, 0 Unchecked, 9.55ms Time], IncrementalHoareTripleChecker [12 Valid, 311 Invalid, 4 Unknown, 485 Unchecked, 10740.61ms Time] [2021-11-05 11:51:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-05 11:51:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 215. [2021-11-05 11:51:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 208 states have (on average 1.2163461538461537) internal successors, (253), 214 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:51:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2021-11-05 11:51:19,957 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 49 [2021-11-05 11:51:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:51:19,957 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2021-11-05 11:51:19,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 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) [2021-11-05 11:51:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2021-11-05 11:51:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 11:51:19,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:51:19,958 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] [2021-11-05 11:51:20,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-05 11:51:20,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:51:20,159 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:51:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:51:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1396521528, now seen corresponding path program 1 times [2021-11-05 11:51:20,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:51:20,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331345688] [2021-11-05 11:51:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:51:20,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:51:20,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:51:20,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823354152] [2021-11-05 11:51:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:51:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:51:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:51:20,214 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) [2021-11-05 11:51:20,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-05 11:51:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:51:20,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-05 11:51:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:51:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:51:21,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:51:21,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:51:21,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331345688] [2021-11-05 11:51:21,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:51:21,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823354152] [2021-11-05 11:51:21,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823354152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:51:21,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:51:21,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 11:51:21,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957103129] [2021-11-05 11:51:21,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:51:21,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 11:51:21,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:51:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 11:51:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 11:51:21,095 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:51:23,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:25,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:51:26,488 INFO L93 Difference]: Finished difference Result 397 states and 458 transitions. [2021-11-05 11:51:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 11:51:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-05 11:51:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:51:26,490 INFO L225 Difference]: With dead ends: 397 [2021-11-05 11:51:26,490 INFO L226 Difference]: Without dead ends: 276 [2021-11-05 11:51:26,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 253.89ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 11:51:26,491 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 61 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4690.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.95ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5203.04ms IncrementalHoareTripleChecker+Time [2021-11-05 11:51:26,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 460 Invalid, 207 Unknown, 0 Unchecked, 3.95ms Time], IncrementalHoareTripleChecker [24 Valid, 181 Invalid, 2 Unknown, 0 Unchecked, 5203.04ms Time] [2021-11-05 11:51:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-05 11:51:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2021-11-05 11:51:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 212 states have (on average 1.2028301886792452) internal successors, (255), 218 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:51:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 255 transitions. [2021-11-05 11:51:26,503 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 255 transitions. Word has length 51 [2021-11-05 11:51:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:51:26,511 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 255 transitions. [2021-11-05 11:51:26,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:51:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 255 transitions. [2021-11-05 11:51:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 11:51:26,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:51:26,513 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] [2021-11-05 11:51:26,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-05 11:51:26,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:51:26,735 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:51:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:51:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 578873078, now seen corresponding path program 1 times [2021-11-05 11:51:26,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:51:26,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048143834] [2021-11-05 11:51:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:51:26,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:51:26,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:51:26,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360270894] [2021-11-05 11:51:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:51:26,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:51:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:51:26,787 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) [2021-11-05 11:51:26,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-05 11:51:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:51:27,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-05 11:51:27,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:51:27,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 11:51:27,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 60 treesize of output 44 [2021-11-05 11:51:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-05 11:51:27,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 41 treesize of output 25 [2021-11-05 11:51:28,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 48 treesize of output 36 [2021-11-05 11:51:28,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 33 treesize of output 21 [2021-11-05 11:51:28,146 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 36 treesize of output 28 [2021-11-05 11:51:28,155 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 28 treesize of output 20 [2021-11-05 11:51:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:51:28,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:51:28,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:51:28,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048143834] [2021-11-05 11:51:28,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:51:28,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360270894] [2021-11-05 11:51:28,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360270894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:51:28,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:51:28,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-05 11:51:28,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099789507] [2021-11-05 11:51:28,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:51:28,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-05 11:51:28,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:51:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-05 11:51:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-05 11:51:28,291 INFO L87 Difference]: Start difference. First operand 219 states and 255 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2021-11-05 11:51:30,335 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:32,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:34,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:36,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:51:39,309 INFO L93 Difference]: Finished difference Result 346 states and 393 transitions. [2021-11-05 11:51:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-05 11:51:39,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 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 [2021-11-05 11:51:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:51:39,311 INFO L225 Difference]: With dead ends: 346 [2021-11-05 11:51:39,311 INFO L226 Difference]: Without dead ends: 294 [2021-11-05 11:51:39,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1212.52ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-11-05 11:51:39,312 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 283 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9283.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.82ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10111.67ms IncrementalHoareTripleChecker+Time [2021-11-05 11:51:39,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 937 Invalid, 435 Unknown, 0 Unchecked, 7.82ms Time], IncrementalHoareTripleChecker [20 Valid, 411 Invalid, 4 Unknown, 0 Unchecked, 10111.67ms Time] [2021-11-05 11:51:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-05 11:51:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 230. [2021-11-05 11:51:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 223 states have (on average 1.201793721973094) internal successors, (268), 229 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:51:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 268 transitions. [2021-11-05 11:51:39,328 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 268 transitions. Word has length 51 [2021-11-05 11:51:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:51:39,328 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 268 transitions. [2021-11-05 11:51:39,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2021-11-05 11:51:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 268 transitions. [2021-11-05 11:51:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 11:51:39,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:51:39,329 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] [2021-11-05 11:51:39,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-05 11:51:39,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:51:39,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:51:39,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:51:39,547 INFO L85 PathProgramCache]: Analyzing trace with hash -432244172, now seen corresponding path program 1 times [2021-11-05 11:51:39,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:51:39,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245812938] [2021-11-05 11:51:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:51:39,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:51:39,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:51:39,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110614463] [2021-11-05 11:51:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:51:39,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:51:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:51:39,652 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) [2021-11-05 11:51:39,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-05 11:51:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:51:40,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-05 11:51:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:51:41,398 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-05 11:51:41,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-11-05 11:51:41,487 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-05 11:51:41,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2021-11-05 11:51:42,648 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 40 treesize of output 28 [2021-11-05 11:51:42,655 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 25 treesize of output 13 [2021-11-05 11:51:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:51:42,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:51:42,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:51:42,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245812938] [2021-11-05 11:51:42,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:51:42,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110614463] [2021-11-05 11:51:42,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110614463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:51:42,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:51:42,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-05 11:51:42,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792452235] [2021-11-05 11:51:42,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:51:42,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-05 11:51:42,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:51:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-05 11:51:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-05 11:51:42,791 INFO L87 Difference]: Start difference. First operand 230 states and 268 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-11-05 11:51:44,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:46,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:49,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:51,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:53,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:55,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:51:57,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:00,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:52:11,426 INFO L93 Difference]: Finished difference Result 495 states and 548 transitions. [2021-11-05 11:52:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-05 11:52:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 [2021-11-05 11:52:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:52:11,429 INFO L225 Difference]: With dead ends: 495 [2021-11-05 11:52:11,429 INFO L226 Difference]: Without dead ends: 393 [2021-11-05 11:52:11,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 7666.92ms TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2021-11-05 11:52:11,430 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 666 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 133 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20276.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.09ms SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21881.58ms IncrementalHoareTripleChecker+Time [2021-11-05 11:52:11,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 1571 Invalid, 1500 Unknown, 0 Unchecked, 19.09ms Time], IncrementalHoareTripleChecker [133 Valid, 1359 Invalid, 8 Unknown, 0 Unchecked, 21881.58ms Time] [2021-11-05 11:52:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-05 11:52:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 242. [2021-11-05 11:52:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 235 states have (on average 1.1914893617021276) internal successors, (280), 241 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:52:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 280 transitions. [2021-11-05 11:52:11,441 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 280 transitions. Word has length 51 [2021-11-05 11:52:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:52:11,447 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 280 transitions. [2021-11-05 11:52:11,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-11-05 11:52:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 280 transitions. [2021-11-05 11:52:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 11:52:11,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:52:11,447 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] [2021-11-05 11:52:11,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-05 11:52:11,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:52:11,650 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:52:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:52:11,650 INFO L85 PathProgramCache]: Analyzing trace with hash 661964948, now seen corresponding path program 1 times [2021-11-05 11:52:11,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:52:11,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072619903] [2021-11-05 11:52:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:52:11,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:52:11,702 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:52:11,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951198450] [2021-11-05 11:52:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:52:11,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:52:11,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:52:11,716 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) [2021-11-05 11:52:11,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-05 11:52:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:52:12,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-05 11:52:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:52:13,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 33 [2021-11-05 11:52:13,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 30 treesize of output 18 [2021-11-05 11:52:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:52:13,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:52:13,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:52:13,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072619903] [2021-11-05 11:52:13,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:52:13,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951198450] [2021-11-05 11:52:13,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951198450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:52:13,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:52:13,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-05 11:52:13,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856259690] [2021-11-05 11:52:13,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:52:13,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 11:52:13,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:52:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 11:52:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-05 11:52:13,626 INFO L87 Difference]: Start difference. First operand 242 states and 280 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 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) [2021-11-05 11:52:15,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:17,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:20,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:22,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:52:25,379 INFO L93 Difference]: Finished difference Result 354 states and 400 transitions. [2021-11-05 11:52:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-05 11:52:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 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 [2021-11-05 11:52:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:52:25,381 INFO L225 Difference]: With dead ends: 354 [2021-11-05 11:52:25,381 INFO L226 Difference]: Without dead ends: 300 [2021-11-05 11:52:25,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1935.38ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-05 11:52:25,382 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 327 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 35 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9383.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10286.78ms IncrementalHoareTripleChecker+Time [2021-11-05 11:52:25,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 804 Invalid, 458 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [35 Valid, 419 Invalid, 4 Unknown, 0 Unchecked, 10286.78ms Time] [2021-11-05 11:52:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-05 11:52:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 240. [2021-11-05 11:52:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 233 states have (on average 1.184549356223176) internal successors, (276), 239 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:52:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 276 transitions. [2021-11-05 11:52:25,395 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 276 transitions. Word has length 51 [2021-11-05 11:52:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:52:25,395 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 276 transitions. [2021-11-05 11:52:25,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 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) [2021-11-05 11:52:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 276 transitions. [2021-11-05 11:52:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 11:52:25,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:52:25,397 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] [2021-11-05 11:52:25,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-05 11:52:25,619 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,SelfDestructingSolverStorable10 [2021-11-05 11:52:25,619 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:52:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:52:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1399281620, now seen corresponding path program 1 times [2021-11-05 11:52:25,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:52:25,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017764627] [2021-11-05 11:52:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:52:25,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:52:25,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:52:25,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168971007] [2021-11-05 11:52:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:52:25,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:52:25,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:52:25,676 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) [2021-11-05 11:52:25,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-05 11:52:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 11:52:26,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-05 11:52:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 11:52:27,512 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-05 11:52:27,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-05 11:52:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 11:52:27,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 11:52:27,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 11:52:27,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017764627] [2021-11-05 11:52:27,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 11:52:27,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168971007] [2021-11-05 11:52:27,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168971007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 11:52:27,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 11:52:27,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 11:52:27,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342448400] [2021-11-05 11:52:27,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 11:52:27,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 11:52:27,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 11:52:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 11:52:27,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-05 11:52:27,928 INFO L87 Difference]: Start difference. First operand 240 states and 276 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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) [2021-11-05 11:52:29,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:32,361 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:34,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:36,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 11:52:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 11:52:38,763 INFO L93 Difference]: Finished difference Result 402 states and 453 transitions. [2021-11-05 11:52:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-05 11:52:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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 [2021-11-05 11:52:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 11:52:38,765 INFO L225 Difference]: With dead ends: 402 [2021-11-05 11:52:38,765 INFO L226 Difference]: Without dead ends: 313 [2021-11-05 11:52:38,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1051.58ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-05 11:52:38,766 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 324 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9240.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10318.18ms IncrementalHoareTripleChecker+Time [2021-11-05 11:52:38,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 698 Invalid, 413 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [34 Valid, 375 Invalid, 4 Unknown, 0 Unchecked, 10318.18ms Time] [2021-11-05 11:52:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-05 11:52:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 248. [2021-11-05 11:52:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 241 states have (on average 1.170124481327801) internal successors, (282), 247 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 11:52:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 282 transitions. [2021-11-05 11:52:38,774 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 282 transitions. Word has length 51 [2021-11-05 11:52:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 11:52:38,774 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 282 transitions. [2021-11-05 11:52:38,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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) [2021-11-05 11:52:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 282 transitions. [2021-11-05 11:52:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 11:52:38,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 11:52:38,775 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] [2021-11-05 11:52:38,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-05 11:52:38,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:52:38,975 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-05 11:52:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 11:52:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 460979762, now seen corresponding path program 1 times [2021-11-05 11:52:38,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 11:52:38,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018558368] [2021-11-05 11:52:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:52:38,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 11:52:39,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 11:52:39,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206044278] [2021-11-05 11:52:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 11:52:39,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 11:52:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 11:52:39,049 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) [2021-11-05 11:52:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-05 11:56:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-05 11:56:00,539 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. Killed by 15