./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_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 bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:26:29,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:26:29,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:26:29,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:26:29,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:26:29,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:26:29,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:26:29,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:26:29,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:26:29,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:26:29,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:26:29,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:26:29,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:26:29,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:26:29,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:26:29,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:26:29,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:26:29,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:26:29,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:26:29,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:26:29,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:26:29,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:26:29,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:26:29,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:26:29,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:26:29,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:26:29,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:26:29,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:26:29,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:26:29,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:26:29,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:26:29,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:26:29,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:26:29,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:26:29,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:26:29,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:26:29,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:26:29,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:26:29,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:26:29,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:26:29,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:26:29,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:26:29,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:26:29,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:26:29,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:26:29,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:26:29,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:26:29,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:26:29,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:26:29,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:26:29,454 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:26:29,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:26:29,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:26:29,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:26:29,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:26:29,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:26:29,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:26:29,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:26:29,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:26:29,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:26:29,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:26:29,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:26:29,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:26:29,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:26:29,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:26:29,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:26:29,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:26:29,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:26:29,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:26:29,458 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:26:29,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:26:29,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:26:29,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:26:29,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2021-11-16 21:26:29,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:26:29,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:26:29,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:26:29,669 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:26:29,670 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:26:29,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-16 21:26:29,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf35ffa3/74f7ecbc6ca24944834a984252e8356b/FLAG149b99e64 [2021-11-16 21:26:30,284 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:26:30,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-16 21:26:30,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf35ffa3/74f7ecbc6ca24944834a984252e8356b/FLAG149b99e64 [2021-11-16 21:26:30,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf35ffa3/74f7ecbc6ca24944834a984252e8356b [2021-11-16 21:26:30,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:26:30,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:26:30,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:26:30,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:26:30,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:26:30,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:26:30" (1/1) ... [2021-11-16 21:26:30,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cdc53ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:30, skipping insertion in model container [2021-11-16 21:26:30,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:26:30" (1/1) ... [2021-11-16 21:26:30,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:26:30,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:26:31,005 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-11-16 21:26:31,011 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-11-16 21:26:31,029 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:26:31,035 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:26:31,418 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,419 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,419 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,420 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,421 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,438 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,447 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,449 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,449 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,450 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,451 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,452 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,452 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,630 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:26:31,631 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:26:31,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:26:31,633 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:26:31,636 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:26:31,636 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:26:31,637 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:26:31,637 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:26:31,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:26:31,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:26:31,748 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:26:31,780 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:26:31,797 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:26:31,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-11-16 21:26:31,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-11-16 21:26:31,816 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:26:31,817 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:26:31,910 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,911 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,913 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,913 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,914 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,925 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,926 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,928 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,929 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,930 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,930 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,930 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,931 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:26:31,965 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:26:31,966 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:26:31,966 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:26:31,967 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:26:31,971 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:26:31,971 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:26:31,972 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:26:31,972 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:26:31,972 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:26:31,972 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:26:31,991 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:26:32,004 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:26:32,126 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:26:32,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32 WrapperNode [2021-11-16 21:26:32,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:26:32,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:26:32,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:26:32,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:26:32,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,247 INFO L137 Inliner]: procedures = 681, calls = 1048, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 224 [2021-11-16 21:26:32,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:26:32,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:26:32,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:26:32,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:26:32,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:26:32,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:26:32,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:26:32,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:26:32,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (1/1) ... [2021-11-16 21:26:32,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:26:32,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:26:32,346 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) [2021-11-16 21:26:32,353 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 [2021-11-16 21:26:32,373 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-16 21:26:32,374 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-16 21:26:32,374 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-11-16 21:26:32,375 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-11-16 21:26:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:26:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 21:26:32,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:26:32,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:26:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:26:32,376 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-16 21:26:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:26:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-16 21:26:32,376 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-16 21:26:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:26:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:26:32,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:26:32,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:26:32,377 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-16 21:26:32,377 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-16 21:26:32,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-16 21:26:32,377 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-16 21:26:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:26:32,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:26:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:26:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:26:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:26:32,378 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 21:26:32,379 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 21:26:32,379 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-16 21:26:32,379 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-16 21:26:32,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:26:32,570 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:26:32,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:26:32,759 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:26:32,764 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:26:32,764 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-16 21:26:32,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:26:32 BoogieIcfgContainer [2021-11-16 21:26:32,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:26:32,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:26:32,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:26:32,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:26:32,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:26:30" (1/3) ... [2021-11-16 21:26:32,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eff0e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:26:32, skipping insertion in model container [2021-11-16 21:26:32,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:26:32" (2/3) ... [2021-11-16 21:26:32,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eff0e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:26:32, skipping insertion in model container [2021-11-16 21:26:32,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:26:32" (3/3) ... [2021-11-16 21:26:32,772 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2021-11-16 21:26:32,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:26:32,776 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:26:32,806 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:26:32,811 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 [2021-11-16 21:26:32,811 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:26:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-16 21:26:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:26:32,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:26:32,846 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:26:32,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:26:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:26:32,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2021-11-16 21:26:32,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:26:32,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085916576] [2021-11-16 21:26:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:26:32,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:26:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:26:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:26:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:26:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:26:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:26:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:26:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:26:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:26:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:26:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:26:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:26:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:26:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:26:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-16 21:26:33,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:26:33,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085916576] [2021-11-16 21:26:33,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085916576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:26:33,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094086011] [2021-11-16 21:26:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:26:33,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:26:33,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:26:33,399 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) [2021-11-16 21:26:33,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 21:26:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:33,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:26:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:26:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-16 21:26:33,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:26:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094086011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:26:33,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:26:33,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-16 21:26:33,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119026333] [2021-11-16 21:26:33,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:26:33,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:26:33,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:26:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:26:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:26:33,802 INFO L87 Difference]: Start difference. First operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:26:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:26:33,853 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2021-11-16 21:26:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:26:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-11-16 21:26:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:26:33,862 INFO L225 Difference]: With dead ends: 274 [2021-11-16 21:26:33,862 INFO L226 Difference]: Without dead ends: 140 [2021-11-16 21:26:33,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:26:33,868 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:26:33,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:26:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-16 21:26:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-11-16 21:26:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-16 21:26:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2021-11-16 21:26:33,930 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2021-11-16 21:26:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:26:33,931 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2021-11-16 21:26:33,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:26:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2021-11-16 21:26:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:26:33,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:26:33,934 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:26:33,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 21:26:34,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-16 21:26:34,148 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:26:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:26:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2021-11-16 21:26:34,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:26:34,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598125009] [2021-11-16 21:26:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:26:34,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:26:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:26:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:26:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:26:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:26:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:26:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:26:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:26:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:26:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:26:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:26:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:26:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:26:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:26:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-16 21:26:34,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:26:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598125009] [2021-11-16 21:26:34,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598125009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:26:34,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841769445] [2021-11-16 21:26:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:26:34,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:26:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:26:34,357 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) [2021-11-16 21:26:34,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 21:26:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:26:34,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:26:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-16 21:26:34,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:26:34,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841769445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:26:34,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:26:34,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-16 21:26:34,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408748098] [2021-11-16 21:26:34,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:26:34,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:26:34,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:26:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:26:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 21:26:34,695 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:26:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:26:34,727 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-11-16 21:26:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:26:34,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-11-16 21:26:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:26:34,732 INFO L225 Difference]: With dead ends: 252 [2021-11-16 21:26:34,732 INFO L226 Difference]: Without dead ends: 138 [2021-11-16 21:26:34,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:26:34,739 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 3 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:26:34,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 520 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:26:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-16 21:26:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-16 21:26:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-16 21:26:34,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2021-11-16 21:26:34,754 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2021-11-16 21:26:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:26:34,755 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2021-11-16 21:26:34,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:26:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2021-11-16 21:26:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:26:34,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:26:34,757 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:26:34,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 21:26:34,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-16 21:26:34,968 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:26:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:26:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2021-11-16 21:26:34,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:26:34,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505036731] [2021-11-16 21:26:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:26:34,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:26:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:26:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:26:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:26:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:26:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:26:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:26:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:26:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:26:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:26:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:26:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:26:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:26:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:26:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-16 21:26:35,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:26:35,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505036731] [2021-11-16 21:26:35,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505036731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:26:35,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759766980] [2021-11-16 21:26:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:26:35,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:26:35,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:26:35,325 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) [2021-11-16 21:26:35,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 21:26:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-16 21:26:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:26:35,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-16 21:26:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-16 21:26:59,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:26:59,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759766980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:26:59,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:26:59,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-16 21:26:59,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020322522] [2021-11-16 21:26:59,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:26:59,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:26:59,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:26:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:26:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:26:59,267 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 21:26:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:26:59,530 INFO L93 Difference]: Finished difference Result 332 states and 455 transitions. [2021-11-16 21:26:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 21:26:59,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-11-16 21:26:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:26:59,534 INFO L225 Difference]: With dead ends: 332 [2021-11-16 21:26:59,534 INFO L226 Difference]: Without dead ends: 229 [2021-11-16 21:26:59,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 121 SyntacticMatches, 21 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:26:59,538 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 60 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:26:59,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1929 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 0 Unknown, 277 Unchecked, 0.2s Time] [2021-11-16 21:26:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-16 21:26:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 185. [2021-11-16 21:26:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.2066115702479339) internal successors, (146), 124 states have internal predecessors, (146), 49 states have call successors, (49), 13 states have call predecessors, (49), 14 states have return successors, (53), 47 states have call predecessors, (53), 48 states have call successors, (53) [2021-11-16 21:26:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 248 transitions. [2021-11-16 21:26:59,554 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 248 transitions. Word has length 116 [2021-11-16 21:26:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:26:59,554 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 248 transitions. [2021-11-16 21:26:59,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 21:26:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 248 transitions. [2021-11-16 21:26:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:26:59,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:26:59,561 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:26:59,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 21:26:59,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:26:59,762 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:26:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:26:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 401032922, now seen corresponding path program 1 times [2021-11-16 21:26:59,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:26:59,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361415935] [2021-11-16 21:26:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:26:59,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:26:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:26:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:26:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:26:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:26:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:26:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:26:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:26:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:26:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:26:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:26:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:26:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:00,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:27:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:27:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:00,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:00,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:27:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:00,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:27:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-16 21:27:00,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:00,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361415935] [2021-11-16 21:27:00,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361415935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:00,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017751969] [2021-11-16 21:27:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:00,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:00,036 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) [2021-11-16 21:27:00,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 21:27:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:00,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-16 21:27:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:00,221 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-16 21:27:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-16 21:27:00,233 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-16 21:27:00,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-16 21:27:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 127 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-16 21:27:20,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-16 21:27:20,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017751969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:20,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:20,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 11] total 34 [2021-11-16 21:27:20,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489345504] [2021-11-16 21:27:20,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:20,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 21:27:20,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 21:27:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=988, Unknown=1, NotChecked=0, Total=1122 [2021-11-16 21:27:20,842 INFO L87 Difference]: Start difference. First operand 185 states and 248 transitions. Second operand has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (42), 12 states have call predecessors, (42), 13 states have call successors, (42) [2021-11-16 21:27:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:24,172 INFO L93 Difference]: Finished difference Result 578 states and 788 transitions. [2021-11-16 21:27:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-16 21:27:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (42), 12 states have call predecessors, (42), 13 states have call successors, (42) Word has length 116 [2021-11-16 21:27:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:24,175 INFO L225 Difference]: With dead ends: 578 [2021-11-16 21:27:24,175 INFO L226 Difference]: Without dead ends: 402 [2021-11-16 21:27:24,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 234 SyntacticMatches, 19 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=404, Invalid=2564, Unknown=2, NotChecked=0, Total=2970 [2021-11-16 21:27:24,177 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 269 mSDsluCounter, 3615 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 3889 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:24,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 3889 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 893 Invalid, 0 Unknown, 902 Unchecked, 0.6s Time] [2021-11-16 21:27:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-16 21:27:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 380. [2021-11-16 21:27:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 276 states have (on average 1.2065217391304348) internal successors, (333), 286 states have internal predecessors, (333), 69 states have call successors, (69), 26 states have call predecessors, (69), 34 states have return successors, (112), 67 states have call predecessors, (112), 68 states have call successors, (112) [2021-11-16 21:27:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 514 transitions. [2021-11-16 21:27:24,213 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 514 transitions. Word has length 116 [2021-11-16 21:27:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:24,215 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 514 transitions. [2021-11-16 21:27:24,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 13 states have call successors, (43), 4 states have call predecessors, (43), 8 states have return successors, (42), 12 states have call predecessors, (42), 13 states have call successors, (42) [2021-11-16 21:27:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 514 transitions. [2021-11-16 21:27:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:27:24,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:24,219 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:24,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:24,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:24,431 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1369878566, now seen corresponding path program 2 times [2021-11-16 21:27:24,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:24,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438034043] [2021-11-16 21:27:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:24,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:27:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:27:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:27:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:27:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:27:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:27:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-16 21:27:24,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:24,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438034043] [2021-11-16 21:27:24,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438034043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:24,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652637684] [2021-11-16 21:27:24,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:27:24,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:24,732 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) [2021-11-16 21:27:24,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 21:27:24,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:27:24,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:27:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-16 21:27:24,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:24,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:24,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-16 21:27:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-16 21:27:26,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:26,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652637684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:26,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:26,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-11-16 21:27:26,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033311242] [2021-11-16 21:27:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:26,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:27:26,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:27:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:27:26,391 INFO L87 Difference]: Start difference. First operand 380 states and 514 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 21:27:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:26,558 INFO L93 Difference]: Finished difference Result 693 states and 985 transitions. [2021-11-16 21:27:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 21:27:26,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-11-16 21:27:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:26,561 INFO L225 Difference]: With dead ends: 693 [2021-11-16 21:27:26,561 INFO L226 Difference]: Without dead ends: 547 [2021-11-16 21:27:26,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-16 21:27:26,563 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 77 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:26,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1168 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2021-11-16 21:27:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-16 21:27:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 502. [2021-11-16 21:27:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 374 states have (on average 1.2272727272727273) internal successors, (459), 389 states have internal predecessors, (459), 83 states have call successors, (83), 31 states have call predecessors, (83), 44 states have return successors, (149), 81 states have call predecessors, (149), 82 states have call successors, (149) [2021-11-16 21:27:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 691 transitions. [2021-11-16 21:27:26,585 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 691 transitions. Word has length 116 [2021-11-16 21:27:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:26,586 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 691 transitions. [2021-11-16 21:27:26,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 21:27:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 691 transitions. [2021-11-16 21:27:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:27:26,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:26,588 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:26,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:26,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:26,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1913971480, now seen corresponding path program 1 times [2021-11-16 21:27:26,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:26,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788395830] [2021-11-16 21:27:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:26,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:27:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:26,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:27:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:27:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:27:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:27:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:27:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-16 21:27:27,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:27,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788395830] [2021-11-16 21:27:27,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788395830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:27,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127858667] [2021-11-16 21:27:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:27,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:27,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:27,068 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) [2021-11-16 21:27:27,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 21:27:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-16 21:27:27,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-16 21:27:27,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:27,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127858667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:27,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:27,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-16 21:27:27,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605151762] [2021-11-16 21:27:27,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:27,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:27:27,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:27:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:27:27,406 INFO L87 Difference]: Start difference. First operand 502 states and 691 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-16 21:27:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:27,574 INFO L93 Difference]: Finished difference Result 858 states and 1177 transitions. [2021-11-16 21:27:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:27:27,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 116 [2021-11-16 21:27:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:27,577 INFO L225 Difference]: With dead ends: 858 [2021-11-16 21:27:27,577 INFO L226 Difference]: Without dead ends: 256 [2021-11-16 21:27:27,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:27:27,579 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 242 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:27,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 751 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-16 21:27:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2021-11-16 21:27:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 169 states have (on average 1.1952662721893492) internal successors, (202), 173 states have internal predecessors, (202), 60 states have call successors, (60), 20 states have call predecessors, (60), 22 states have return successors, (78), 58 states have call predecessors, (78), 59 states have call successors, (78) [2021-11-16 21:27:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 340 transitions. [2021-11-16 21:27:27,602 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 340 transitions. Word has length 116 [2021-11-16 21:27:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:27,603 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 340 transitions. [2021-11-16 21:27:27,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-16 21:27:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 340 transitions. [2021-11-16 21:27:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:27:27,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:27,604 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:27,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:27,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:27,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:27,822 INFO L85 PathProgramCache]: Analyzing trace with hash -552701722, now seen corresponding path program 1 times [2021-11-16 21:27:27,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:27,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052917024] [2021-11-16 21:27:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:27,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:27:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:27:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:27:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:27:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:27:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:27:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-16 21:27:28,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:28,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052917024] [2021-11-16 21:27:28,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052917024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:28,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534154360] [2021-11-16 21:27:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:28,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:28,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:28,013 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) [2021-11-16 21:27:28,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 21:27:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-16 21:27:28,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:28,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-16 21:27:28,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-16 21:27:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-16 21:27:28,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2021-11-16 21:27:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:27:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-16 21:27:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 21:27:29,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:29,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534154360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:29,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:29,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2021-11-16 21:27:29,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790568355] [2021-11-16 21:27:29,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:29,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 21:27:29,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:29,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 21:27:29,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-16 21:27:29,655 INFO L87 Difference]: Start difference. First operand 252 states and 340 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:27:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:29,847 INFO L93 Difference]: Finished difference Result 491 states and 680 transitions. [2021-11-16 21:27:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:27:29,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 116 [2021-11-16 21:27:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:29,849 INFO L225 Difference]: With dead ends: 491 [2021-11-16 21:27:29,849 INFO L226 Difference]: Without dead ends: 302 [2021-11-16 21:27:29,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:27:29,850 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 44 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:29,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 837 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2021-11-16 21:27:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-16 21:27:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 262. [2021-11-16 21:27:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 178 states have (on average 1.196629213483146) internal successors, (213), 183 states have internal predecessors, (213), 60 states have call successors, (60), 20 states have call predecessors, (60), 23 states have return successors, (79), 58 states have call predecessors, (79), 59 states have call successors, (79) [2021-11-16 21:27:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 352 transitions. [2021-11-16 21:27:29,867 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 352 transitions. Word has length 116 [2021-11-16 21:27:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:29,868 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 352 transitions. [2021-11-16 21:27:29,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:27:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 352 transitions. [2021-11-16 21:27:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:27:29,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:29,870 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:29,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:30,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:30,080 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash -350877788, now seen corresponding path program 1 times [2021-11-16 21:27:30,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:30,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605885804] [2021-11-16 21:27:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:30,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:27:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:27:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:27:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:27:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:27:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:27:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-16 21:27:30,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:30,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605885804] [2021-11-16 21:27:30,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605885804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:30,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803476873] [2021-11-16 21:27:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:30,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:30,196 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) [2021-11-16 21:27:30,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 21:27:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-16 21:27:30,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:30,391 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-16 21:27:30,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-16 21:27:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 21:27:30,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:30,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803476873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:30,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:30,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2021-11-16 21:27:30,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960197333] [2021-11-16 21:27:30,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:27:30,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:27:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:27:30,985 INFO L87 Difference]: Start difference. First operand 262 states and 352 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:27:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:31,084 INFO L93 Difference]: Finished difference Result 492 states and 680 transitions. [2021-11-16 21:27:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:27:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 116 [2021-11-16 21:27:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:31,086 INFO L225 Difference]: With dead ends: 492 [2021-11-16 21:27:31,086 INFO L226 Difference]: Without dead ends: 302 [2021-11-16 21:27:31,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:27:31,087 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 51 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:31,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 861 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-11-16 21:27:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-16 21:27:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 262. [2021-11-16 21:27:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 178 states have (on average 1.1910112359550562) internal successors, (212), 183 states have internal predecessors, (212), 60 states have call successors, (60), 20 states have call predecessors, (60), 23 states have return successors, (79), 58 states have call predecessors, (79), 59 states have call successors, (79) [2021-11-16 21:27:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 351 transitions. [2021-11-16 21:27:31,102 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 351 transitions. Word has length 116 [2021-11-16 21:27:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:31,103 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 351 transitions. [2021-11-16 21:27:31,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:27:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 351 transitions. [2021-11-16 21:27:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-16 21:27:31,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:31,105 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:31,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:31,315 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,SelfDestructingSolverStorable7 [2021-11-16 21:27:31,315 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash 328394466, now seen corresponding path program 1 times [2021-11-16 21:27:31,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:31,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61842278] [2021-11-16 21:27:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:31,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:27:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 21:27:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:27:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:27:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:27:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:27:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-16 21:27:31,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61842278] [2021-11-16 21:27:31,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61842278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430170272] [2021-11-16 21:27:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:31,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:31,463 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) [2021-11-16 21:27:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 21:27:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-16 21:27:31,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:31,633 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-16 21:27:31,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-16 21:27:31,650 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-16 21:27:31,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-16 21:27:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 146 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-16 21:27:38,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-16 21:27:38,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430170272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:38,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:38,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 12] total 31 [2021-11-16 21:27:38,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729018408] [2021-11-16 21:27:38,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:38,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 21:27:38,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 21:27:38,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-11-16 21:27:38,897 INFO L87 Difference]: Start difference. First operand 262 states and 351 transitions. Second operand has 31 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 11 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-16 21:27:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:40,019 INFO L93 Difference]: Finished difference Result 520 states and 723 transitions. [2021-11-16 21:27:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-16 21:27:40,020 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 11 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) Word has length 116 [2021-11-16 21:27:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:40,021 INFO L225 Difference]: With dead ends: 520 [2021-11-16 21:27:40,021 INFO L226 Difference]: Without dead ends: 305 [2021-11-16 21:27:40,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 229 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-11-16 21:27:40,023 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 88 mSDsluCounter, 2555 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:40,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 2735 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 951 Invalid, 0 Unknown, 527 Unchecked, 0.5s Time] [2021-11-16 21:27:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-16 21:27:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 281. [2021-11-16 21:27:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 186 states have (on average 1.1774193548387097) internal successors, (219), 194 states have internal predecessors, (219), 68 states have call successors, (68), 20 states have call predecessors, (68), 26 states have return successors, (99), 66 states have call predecessors, (99), 67 states have call successors, (99) [2021-11-16 21:27:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 386 transitions. [2021-11-16 21:27:40,036 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 386 transitions. Word has length 116 [2021-11-16 21:27:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:40,036 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 386 transitions. [2021-11-16 21:27:40,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 11 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-16 21:27:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 386 transitions. [2021-11-16 21:27:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-16 21:27:40,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:40,038 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:40,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:40,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:40,251 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -699722662, now seen corresponding path program 1 times [2021-11-16 21:27:40,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:40,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562895495] [2021-11-16 21:27:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:40,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 21:27:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 21:27:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 21:27:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 21:27:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 21:27:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 21:27:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-16 21:27:40,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:40,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562895495] [2021-11-16 21:27:40,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562895495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:40,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446301308] [2021-11-16 21:27:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:40,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:40,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:40,365 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) [2021-11-16 21:27:40,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 21:27:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-16 21:27:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 21:27:40,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:40,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446301308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:40,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:40,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-11-16 21:27:40,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615306279] [2021-11-16 21:27:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:40,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:27:40,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:27:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:27:40,665 INFO L87 Difference]: Start difference. First operand 281 states and 386 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:27:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:40,858 INFO L93 Difference]: Finished difference Result 505 states and 707 transitions. [2021-11-16 21:27:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:27:40,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 118 [2021-11-16 21:27:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:40,860 INFO L225 Difference]: With dead ends: 505 [2021-11-16 21:27:40,860 INFO L226 Difference]: Without dead ends: 287 [2021-11-16 21:27:40,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:27:40,862 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 217 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:40,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 746 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:27:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-16 21:27:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2021-11-16 21:27:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 189 states have (on average 1.1746031746031746) internal successors, (222), 198 states have internal predecessors, (222), 68 states have call successors, (68), 20 states have call predecessors, (68), 27 states have return successors, (101), 66 states have call predecessors, (101), 67 states have call successors, (101) [2021-11-16 21:27:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 391 transitions. [2021-11-16 21:27:40,873 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 391 transitions. Word has length 118 [2021-11-16 21:27:40,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:40,874 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 391 transitions. [2021-11-16 21:27:40,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:27:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 391 transitions. [2021-11-16 21:27:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-16 21:27:40,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:40,875 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:40,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:41,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-16 21:27:41,091 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash -267467697, now seen corresponding path program 1 times [2021-11-16 21:27:41,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:41,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695793919] [2021-11-16 21:27:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:41,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-16 21:27:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-16 21:27:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:27:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 21:27:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 21:27:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 21:27:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-16 21:27:41,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:41,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695793919] [2021-11-16 21:27:41,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695793919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:41,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290354909] [2021-11-16 21:27:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:41,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:41,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:41,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:27:41,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 21:27:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:41,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-16 21:27:41,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 21:27:41,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290354909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:41,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:41,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-16 21:27:41,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679837532] [2021-11-16 21:27:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:41,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:27:41,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:27:41,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:27:41,570 INFO L87 Difference]: Start difference. First operand 285 states and 391 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:27:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:41,838 INFO L93 Difference]: Finished difference Result 523 states and 739 transitions. [2021-11-16 21:27:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:27:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2021-11-16 21:27:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:41,840 INFO L225 Difference]: With dead ends: 523 [2021-11-16 21:27:41,840 INFO L226 Difference]: Without dead ends: 301 [2021-11-16 21:27:41,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:27:41,842 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 256 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:41,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 869 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:27:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-16 21:27:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 287. [2021-11-16 21:27:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 191 states have (on average 1.1727748691099475) internal successors, (224), 200 states have internal predecessors, (224), 68 states have call successors, (68), 20 states have call predecessors, (68), 27 states have return successors, (101), 66 states have call predecessors, (101), 67 states have call successors, (101) [2021-11-16 21:27:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 393 transitions. [2021-11-16 21:27:41,856 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 393 transitions. Word has length 120 [2021-11-16 21:27:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:41,856 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 393 transitions. [2021-11-16 21:27:41,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-16 21:27:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 393 transitions. [2021-11-16 21:27:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-16 21:27:41,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:41,858 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:41,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:42,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-16 21:27:42,067 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1089611311, now seen corresponding path program 1 times [2021-11-16 21:27:42,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:42,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940515433] [2021-11-16 21:27:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:42,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-16 21:27:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 21:27:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 21:27:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:27:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 21:27:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-16 21:27:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-16 21:27:42,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:42,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940515433] [2021-11-16 21:27:42,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940515433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:42,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852008168] [2021-11-16 21:27:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:42,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:42,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:42,212 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:27:42,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 21:27:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-16 21:27:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-16 21:27:42,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:42,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852008168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:42,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:42,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-16 21:27:42,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053641784] [2021-11-16 21:27:42,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:42,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 21:27:42,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 21:27:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:27:42,457 INFO L87 Difference]: Start difference. First operand 287 states and 393 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:27:42,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:42,474 INFO L93 Difference]: Finished difference Result 514 states and 723 transitions. [2021-11-16 21:27:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 21:27:42,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 121 [2021-11-16 21:27:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:42,476 INFO L225 Difference]: With dead ends: 514 [2021-11-16 21:27:42,476 INFO L226 Difference]: Without dead ends: 290 [2021-11-16 21:27:42,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:27:42,478 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 6 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:42,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 353 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:27:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-16 21:27:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 284. [2021-11-16 21:27:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 188 states have (on average 1.1702127659574468) internal successors, (220), 196 states have internal predecessors, (220), 69 states have call successors, (69), 20 states have call predecessors, (69), 26 states have return successors, (100), 67 states have call predecessors, (100), 68 states have call successors, (100) [2021-11-16 21:27:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 389 transitions. [2021-11-16 21:27:42,493 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 389 transitions. Word has length 121 [2021-11-16 21:27:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:42,493 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 389 transitions. [2021-11-16 21:27:42,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 21:27:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 389 transitions. [2021-11-16 21:27:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-16 21:27:42,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:42,496 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:42,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:42,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-16 21:27:42,715 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1363735611, now seen corresponding path program 1 times [2021-11-16 21:27:42,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:42,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527269492] [2021-11-16 21:27:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:42,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-16 21:27:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-16 21:27:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:27:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 21:27:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-16 21:27:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-16 21:27:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-16 21:27:42,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:42,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527269492] [2021-11-16 21:27:42,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527269492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:42,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946895950] [2021-11-16 21:27:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:42,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:42,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:42,912 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:27:42,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 21:27:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-16 21:27:43,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-16 21:27:43,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:27:43,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946895950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:27:43,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:27:43,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 14 [2021-11-16 21:27:43,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413191772] [2021-11-16 21:27:43,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:27:43,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:27:43,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:27:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-16 21:27:43,329 INFO L87 Difference]: Start difference. First operand 284 states and 389 transitions. Second operand has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:27:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:43,683 INFO L93 Difference]: Finished difference Result 466 states and 645 transitions. [2021-11-16 21:27:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:27:43,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 129 [2021-11-16 21:27:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:43,685 INFO L225 Difference]: With dead ends: 466 [2021-11-16 21:27:43,685 INFO L226 Difference]: Without dead ends: 231 [2021-11-16 21:27:43,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-16 21:27:43,687 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 179 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:43,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1198 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:27:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-16 21:27:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 223. [2021-11-16 21:27:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 154 states have internal predecessors, (173), 53 states have call successors, (53), 17 states have call predecessors, (53), 20 states have return successors, (74), 51 states have call predecessors, (74), 52 states have call successors, (74) [2021-11-16 21:27:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 300 transitions. [2021-11-16 21:27:43,702 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 300 transitions. Word has length 129 [2021-11-16 21:27:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:43,702 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 300 transitions. [2021-11-16 21:27:43,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:27:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 300 transitions. [2021-11-16 21:27:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-16 21:27:43,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:43,704 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:43,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:43,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-16 21:27:43,916 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash -265417058, now seen corresponding path program 1 times [2021-11-16 21:27:43,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:43,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840620087] [2021-11-16 21:27:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:43,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:43,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-16 21:27:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-16 21:27:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-16 21:27:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-16 21:27:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-16 21:27:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-16 21:27:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-16 21:27:44,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:44,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840620087] [2021-11-16 21:27:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840620087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:44,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050433226] [2021-11-16 21:27:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:44,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:44,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:27:44,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 21:27:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-16 21:27:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:44,267 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:27:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:27:44,291 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:27:44,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:27:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 127 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-16 21:27:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:27:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-16 21:27:53,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050433226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:27:53,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:27:53,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 11] total 32 [2021-11-16 21:27:53,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320983486] [2021-11-16 21:27:53,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:27:53,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-16 21:27:53,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:27:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-16 21:27:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-16 21:27:53,342 INFO L87 Difference]: Start difference. First operand 223 states and 300 transitions. Second operand has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 11 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (39), 10 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-16 21:27:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:27:54,459 INFO L93 Difference]: Finished difference Result 459 states and 626 transitions. [2021-11-16 21:27:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-16 21:27:54,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 11 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (39), 10 states have call predecessors, (39), 11 states have call successors, (39) Word has length 131 [2021-11-16 21:27:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:27:54,461 INFO L225 Difference]: With dead ends: 459 [2021-11-16 21:27:54,461 INFO L226 Difference]: Without dead ends: 304 [2021-11-16 21:27:54,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 262 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2021-11-16 21:27:54,463 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 108 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 2991 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:27:54,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 2991 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 404 Invalid, 0 Unknown, 448 Unchecked, 0.3s Time] [2021-11-16 21:27:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-16 21:27:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 277. [2021-11-16 21:27:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 194 states have (on average 1.190721649484536) internal successors, (231), 198 states have internal predecessors, (231), 57 states have call successors, (57), 23 states have call predecessors, (57), 25 states have return successors, (69), 55 states have call predecessors, (69), 56 states have call successors, (69) [2021-11-16 21:27:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 357 transitions. [2021-11-16 21:27:54,475 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 357 transitions. Word has length 131 [2021-11-16 21:27:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:27:54,475 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 357 transitions. [2021-11-16 21:27:54,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 11 states have call successors, (39), 4 states have call predecessors, (39), 8 states have return successors, (39), 10 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-16 21:27:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 357 transitions. [2021-11-16 21:27:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-16 21:27:54,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:27:54,477 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:27:54,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 21:27:54,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:54,694 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:27:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:27:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash 369986644, now seen corresponding path program 1 times [2021-11-16 21:27:54,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:27:54,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635262460] [2021-11-16 21:27:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:54,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:27:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:27:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:27:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:27:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:27:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:27:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:27:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:27:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:27:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:27:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:27:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:27:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:27:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:27:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 21:27:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 21:27:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-16 21:27:54,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:27:54,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635262460] [2021-11-16 21:27:54,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635262460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:27:54,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136001302] [2021-11-16 21:27:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:27:54,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:27:54,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:27:54,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:27:54,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 21:27:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:27:55,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-16 21:27:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:27:55,158 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:27:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:28:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 119 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 21:28:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:28:33,435 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 349 treesize of output 333 [2021-11-16 21:28:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-16 21:28:33,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136001302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:28:33,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:28:33,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 17] total 41 [2021-11-16 21:28:33,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745111294] [2021-11-16 21:28:33,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:28:33,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-16 21:28:33,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:28:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-16 21:28:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1479, Unknown=2, NotChecked=0, Total=1640 [2021-11-16 21:28:33,766 INFO L87 Difference]: Start difference. First operand 277 states and 357 transitions. Second operand has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 39 states have internal predecessors, (162), 18 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) [2021-11-16 21:28:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:28:35,578 INFO L93 Difference]: Finished difference Result 516 states and 679 transitions. [2021-11-16 21:28:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-16 21:28:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 39 states have internal predecessors, (162), 18 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) Word has length 132 [2021-11-16 21:28:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:28:35,580 INFO L225 Difference]: With dead ends: 516 [2021-11-16 21:28:35,580 INFO L226 Difference]: Without dead ends: 379 [2021-11-16 21:28:35,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 254 SyntacticMatches, 18 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=248, Invalid=2300, Unknown=2, NotChecked=0, Total=2550 [2021-11-16 21:28:35,582 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 167 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 3569 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:28:35,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 3569 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 920 Invalid, 0 Unknown, 366 Unchecked, 0.5s Time] [2021-11-16 21:28:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-16 21:28:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 338. [2021-11-16 21:28:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 240 states have (on average 1.1958333333333333) internal successors, (287), 248 states have internal predecessors, (287), 64 states have call successors, (64), 27 states have call predecessors, (64), 33 states have return successors, (87), 62 states have call predecessors, (87), 63 states have call successors, (87) [2021-11-16 21:28:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 438 transitions. [2021-11-16 21:28:35,596 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 438 transitions. Word has length 132 [2021-11-16 21:28:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:28:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 438 transitions. [2021-11-16 21:28:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 39 states have internal predecessors, (162), 18 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) [2021-11-16 21:28:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 438 transitions. [2021-11-16 21:28:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 21:28:35,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:28:35,598 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:28:35,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-16 21:28:35,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-16 21:28:35,811 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:28:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:28:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1229095438, now seen corresponding path program 1 times [2021-11-16 21:28:35,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:28:35,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720608033] [2021-11-16 21:28:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:35,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:28:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:28:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:28:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:28:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:28:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:28:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:28:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:28:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-16 21:28:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-16 21:28:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 21:28:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 21:28:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 21:28:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-16 21:28:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-16 21:28:36,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:28:36,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720608033] [2021-11-16 21:28:36,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720608033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:36,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831766187] [2021-11-16 21:28:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:36,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:28:36,076 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:28:36,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 21:28:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-16 21:28:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:28:36,198 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 [2021-11-16 21:28:36,375 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 21:28:36,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-16 21:28:36,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:28:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:36,466 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-16 21:28:36,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 43 [2021-11-16 21:28:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 112 proven. 19 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 21:28:39,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:28:41,092 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int)) (not (= |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|)))) is different from false [2021-11-16 21:28:41,103 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 1553 treesize of output 1537 [2021-11-16 21:28:41,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831766187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:41,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:28:41,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-11-16 21:28:41,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611067843] [2021-11-16 21:28:41,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:28:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 21:28:41,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:28:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 21:28:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1084, Unknown=1, NotChecked=66, Total=1260 [2021-11-16 21:28:41,424 INFO L87 Difference]: Start difference. First operand 338 states and 438 transitions. Second operand has 27 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 12 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-16 21:28:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:28:42,809 INFO L93 Difference]: Finished difference Result 786 states and 1141 transitions. [2021-11-16 21:28:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-16 21:28:42,810 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 12 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 134 [2021-11-16 21:28:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:28:42,812 INFO L225 Difference]: With dead ends: 786 [2021-11-16 21:28:42,812 INFO L226 Difference]: Without dead ends: 563 [2021-11-16 21:28:42,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 266 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=269, Invalid=2596, Unknown=1, NotChecked=104, Total=2970 [2021-11-16 21:28:42,814 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 280 mSDsluCounter, 3348 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 848 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:28:42,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 3614 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1338 Invalid, 0 Unknown, 848 Unchecked, 0.9s Time] [2021-11-16 21:28:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-16 21:28:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 395. [2021-11-16 21:28:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 282 states have (on average 1.1914893617021276) internal successors, (336), 292 states have internal predecessors, (336), 74 states have call successors, (74), 31 states have call predecessors, (74), 38 states have return successors, (104), 71 states have call predecessors, (104), 73 states have call successors, (104) [2021-11-16 21:28:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 514 transitions. [2021-11-16 21:28:42,836 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 514 transitions. Word has length 134 [2021-11-16 21:28:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:28:42,836 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 514 transitions. [2021-11-16 21:28:42,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 12 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-16 21:28:42,837 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 514 transitions. [2021-11-16 21:28:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-16 21:28:42,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:28:42,838 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:28:42,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 21:28:43,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-16 21:28:43,051 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:28:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:28:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1187163488, now seen corresponding path program 1 times [2021-11-16 21:28:43,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:28:43,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039299952] [2021-11-16 21:28:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:43,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:28:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:28:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:28:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:28:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:28:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:28:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:28:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:28:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:28:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:28:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:28:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:28:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 21:28:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 21:28:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-16 21:28:43,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:28:43,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039299952] [2021-11-16 21:28:43,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039299952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:43,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824668732] [2021-11-16 21:28:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:43,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:28:43,256 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:28:43,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 21:28:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-16 21:28:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:28:43,431 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:28:43,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:28:43,449 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:28:43,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:28:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 126 proven. 12 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-16 21:28:51,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:28:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-16 21:28:52,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824668732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:28:52,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:28:52,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 10] total 28 [2021-11-16 21:28:52,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640177448] [2021-11-16 21:28:52,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:28:52,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 21:28:52,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:28:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 21:28:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-11-16 21:28:52,243 INFO L87 Difference]: Start difference. First operand 395 states and 514 transitions. Second operand has 28 states, 27 states have (on average 5.481481481481482) internal successors, (148), 25 states have internal predecessors, (148), 14 states have call successors, (39), 5 states have call predecessors, (39), 10 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2021-11-16 21:28:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:28:53,473 INFO L93 Difference]: Finished difference Result 660 states and 852 transitions. [2021-11-16 21:28:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-16 21:28:53,473 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.481481481481482) internal successors, (148), 25 states have internal predecessors, (148), 14 states have call successors, (39), 5 states have call predecessors, (39), 10 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) Word has length 132 [2021-11-16 21:28:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:28:53,475 INFO L225 Difference]: With dead ends: 660 [2021-11-16 21:28:53,475 INFO L226 Difference]: Without dead ends: 405 [2021-11-16 21:28:53,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 262 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-11-16 21:28:53,477 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 155 mSDsluCounter, 2657 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 21:28:53,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 2842 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 682 Invalid, 0 Unknown, 737 Unchecked, 0.5s Time] [2021-11-16 21:28:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-16 21:28:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 369. [2021-11-16 21:28:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 269 states have (on average 1.1895910780669146) internal successors, (320), 277 states have internal predecessors, (320), 66 states have call successors, (66), 28 states have call predecessors, (66), 33 states have return successors, (82), 63 states have call predecessors, (82), 65 states have call successors, (82) [2021-11-16 21:28:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 468 transitions. [2021-11-16 21:28:53,506 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 468 transitions. Word has length 132 [2021-11-16 21:28:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:28:53,506 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 468 transitions. [2021-11-16 21:28:53,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.481481481481482) internal successors, (148), 25 states have internal predecessors, (148), 14 states have call successors, (39), 5 states have call predecessors, (39), 10 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2021-11-16 21:28:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 468 transitions. [2021-11-16 21:28:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-16 21:28:53,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:28:53,508 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:28:53,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 21:28:53,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-16 21:28:53,722 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:28:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:28:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash 800652698, now seen corresponding path program 1 times [2021-11-16 21:28:53,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:28:53,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054445383] [2021-11-16 21:28:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:53,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:28:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:28:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:28:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:28:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:28:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:28:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:28:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:28:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:28:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:28:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 21:28:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 21:28:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-16 21:28:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-16 21:28:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-16 21:28:53,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:28:53,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054445383] [2021-11-16 21:28:53,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054445383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:53,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332201710] [2021-11-16 21:28:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:53,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:53,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:28:53,911 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:28:53,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 21:28:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-16 21:28:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:28:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 21:28:54,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:28:54,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332201710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:28:54,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:28:54,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-16 21:28:54,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662471740] [2021-11-16 21:28:54,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:28:54,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:28:54,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:28:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:28:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:28:54,253 INFO L87 Difference]: Start difference. First operand 369 states and 468 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:28:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:28:54,491 INFO L93 Difference]: Finished difference Result 535 states and 689 transitions. [2021-11-16 21:28:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 21:28:54,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 134 [2021-11-16 21:28:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:28:54,493 INFO L225 Difference]: With dead ends: 535 [2021-11-16 21:28:54,493 INFO L226 Difference]: Without dead ends: 373 [2021-11-16 21:28:54,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-16 21:28:54,494 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 227 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:28:54,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 872 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:28:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-16 21:28:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2021-11-16 21:28:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 269 states have (on average 1.174721189591078) internal successors, (316), 277 states have internal predecessors, (316), 66 states have call successors, (66), 28 states have call predecessors, (66), 33 states have return successors, (82), 63 states have call predecessors, (82), 65 states have call successors, (82) [2021-11-16 21:28:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 464 transitions. [2021-11-16 21:28:54,531 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 464 transitions. Word has length 134 [2021-11-16 21:28:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:28:54,532 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 464 transitions. [2021-11-16 21:28:54,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:28:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 464 transitions. [2021-11-16 21:28:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-16 21:28:54,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:28:54,533 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:28:54,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 21:28:54,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-16 21:28:54,765 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:28:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:28:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1237574457, now seen corresponding path program 1 times [2021-11-16 21:28:54,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:28:54,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754100252] [2021-11-16 21:28:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:54,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:28:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:28:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:28:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:28:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:28:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:28:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:28:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:28:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:28:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:28:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-16 21:28:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 21:28:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-16 21:28:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-16 21:28:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-16 21:28:54,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:28:54,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754100252] [2021-11-16 21:28:54,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754100252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:54,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891443947] [2021-11-16 21:28:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:54,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:54,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:28:54,934 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:28:54,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 21:28:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 21:28:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:28:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-16 21:28:55,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:28:55,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891443947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:28:55,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:28:55,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-11-16 21:28:55,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810339184] [2021-11-16 21:28:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:28:55,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 21:28:55,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:28:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 21:28:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:28:55,361 INFO L87 Difference]: Start difference. First operand 369 states and 464 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:28:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:28:55,676 INFO L93 Difference]: Finished difference Result 544 states and 699 transitions. [2021-11-16 21:28:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:28:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 136 [2021-11-16 21:28:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:28:55,678 INFO L225 Difference]: With dead ends: 544 [2021-11-16 21:28:55,678 INFO L226 Difference]: Without dead ends: 380 [2021-11-16 21:28:55,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-11-16 21:28:55,679 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 247 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:28:55,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 998 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:28:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-16 21:28:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 366. [2021-11-16 21:28:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 266 states have (on average 1.1616541353383458) internal successors, (309), 274 states have internal predecessors, (309), 66 states have call successors, (66), 28 states have call predecessors, (66), 33 states have return successors, (82), 63 states have call predecessors, (82), 65 states have call successors, (82) [2021-11-16 21:28:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 457 transitions. [2021-11-16 21:28:55,697 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 457 transitions. Word has length 136 [2021-11-16 21:28:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:28:55,704 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 457 transitions. [2021-11-16 21:28:55,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:28:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 457 transitions. [2021-11-16 21:28:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-16 21:28:55,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:28:55,706 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:28:55,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 21:28:55,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:55,923 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:28:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:28:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 226487455, now seen corresponding path program 1 times [2021-11-16 21:28:55,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:28:55,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895814428] [2021-11-16 21:28:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:55,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:28:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:28:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:28:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:28:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:28:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:28:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:28:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:28:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-16 21:28:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-16 21:28:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:28:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-16 21:28:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-16 21:28:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:28:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-16 21:28:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 21:28:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-16 21:28:56,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:28:56,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895814428] [2021-11-16 21:28:56,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895814428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:28:56,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922356506] [2021-11-16 21:28:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:28:56,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:28:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:28:56,071 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:28:56,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 21:28:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:28:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-16 21:28:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:28:56,298 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:28:56,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-16 21:28:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:56,409 INFO L354 Elim1Store]: treesize reduction 123, result has 25.0 percent of original size [2021-11-16 21:28:56,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 64 [2021-11-16 21:28:56,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:28:56,711 INFO L354 Elim1Store]: treesize reduction 286, result has 23.9 percent of original size [2021-11-16 21:28:56,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 104 treesize of output 131 [2021-11-16 21:29:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 143 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-16 21:29:14,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:29:23,224 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_18| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|) (not (= |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base| (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|)))) (store .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| (store (store (select .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_18| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|))) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|))))) is different from false [2021-11-16 21:29:23,257 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 739236 treesize of output 737188 [2021-11-16 21:29:59,899 WARN L227 SmtUtils]: Spent 36.64s on a formula simplification. DAG size of input: 1341 DAG size of output: 1341 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-16 21:30:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 179 trivial. 3 not checked. [2021-11-16 21:30:20,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922356506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:20,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:20,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 13] total 31 [2021-11-16 21:30:20,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497149305] [2021-11-16 21:30:20,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:20,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-16 21:30:20,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-16 21:30:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=779, Unknown=3, NotChecked=56, Total=930 [2021-11-16 21:30:20,658 INFO L87 Difference]: Start difference. First operand 366 states and 457 transitions. Second operand has 31 states, 30 states have (on average 5.3) internal successors, (159), 30 states have internal predecessors, (159), 12 states have call successors, (44), 3 states have call predecessors, (44), 7 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2021-11-16 21:30:22,205 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset|))) (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) (= |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset| 0) (= |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|) (= |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) (exists ((|ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset|)) (+ 8 |ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset|)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|)) (<= |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| .cse0) (< .cse0 |c_#StackHeapBarrier|) (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_18| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|) (not (= |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base| (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|)))) (store .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| (store (store (select .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_18| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|))) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|))))))) is different from false [2021-11-16 21:30:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:23,266 INFO L93 Difference]: Finished difference Result 698 states and 927 transitions. [2021-11-16 21:30:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-16 21:30:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.3) internal successors, (159), 30 states have internal predecessors, (159), 12 states have call successors, (44), 3 states have call predecessors, (44), 7 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) Word has length 149 [2021-11-16 21:30:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:23,268 INFO L225 Difference]: With dead ends: 698 [2021-11-16 21:30:23,268 INFO L226 Difference]: Without dead ends: 471 [2021-11-16 21:30:23,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 302 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=198, Invalid=1876, Unknown=4, NotChecked=178, Total=2256 [2021-11-16 21:30:23,270 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 142 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 3729 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1078 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:23,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 3729 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1025 Invalid, 0 Unknown, 1078 Unchecked, 0.7s Time] [2021-11-16 21:30:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-16 21:30:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 339. [2021-11-16 21:30:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 244 states have (on average 1.1598360655737705) internal successors, (283), 250 states have internal predecessors, (283), 65 states have call successors, (65), 26 states have call predecessors, (65), 29 states have return successors, (74), 62 states have call predecessors, (74), 64 states have call successors, (74) [2021-11-16 21:30:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 422 transitions. [2021-11-16 21:30:23,292 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 422 transitions. Word has length 149 [2021-11-16 21:30:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:23,292 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 422 transitions. [2021-11-16 21:30:23,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.3) internal successors, (159), 30 states have internal predecessors, (159), 12 states have call successors, (44), 3 states have call predecessors, (44), 7 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2021-11-16 21:30:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 422 transitions. [2021-11-16 21:30:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-16 21:30:23,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:23,295 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:23,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:23,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:23,510 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:23,510 INFO L85 PathProgramCache]: Analyzing trace with hash 900691480, now seen corresponding path program 1 times [2021-11-16 21:30:23,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:23,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555503067] [2021-11-16 21:30:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:23,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:30:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:30:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:30:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:30:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:30:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:30:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 21:30:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 21:30:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-16 21:30:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 21:30:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-16 21:30:24,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:24,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555503067] [2021-11-16 21:30:24,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555503067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:24,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064891829] [2021-11-16 21:30:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:24,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:24,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:24,075 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:30:24,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 21:30:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:24,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-16 21:30:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:24,359 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-16 21:30:24,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-16 21:30:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 49 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-16 21:30:26,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:26,999 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 210 treesize of output 198 [2021-11-16 21:30:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-16 21:30:27,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064891829] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:27,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:30:27,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 16] total 40 [2021-11-16 21:30:27,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124333800] [2021-11-16 21:30:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:30:27,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:30:27,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:30:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2021-11-16 21:30:27,142 INFO L87 Difference]: Start difference. First operand 339 states and 422 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:30:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:27,701 INFO L93 Difference]: Finished difference Result 456 states and 575 transitions. [2021-11-16 21:30:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:30:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 148 [2021-11-16 21:30:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:27,703 INFO L225 Difference]: With dead ends: 456 [2021-11-16 21:30:27,703 INFO L226 Difference]: Without dead ends: 342 [2021-11-16 21:30:27,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 287 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=186, Invalid=2166, Unknown=0, NotChecked=0, Total=2352 [2021-11-16 21:30:27,705 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 231 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:27,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 951 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:30:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-16 21:30:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 339. [2021-11-16 21:30:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 244 states have (on average 1.1557377049180328) internal successors, (282), 250 states have internal predecessors, (282), 65 states have call successors, (65), 26 states have call predecessors, (65), 29 states have return successors, (74), 62 states have call predecessors, (74), 64 states have call successors, (74) [2021-11-16 21:30:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2021-11-16 21:30:27,724 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 148 [2021-11-16 21:30:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:27,724 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2021-11-16 21:30:27,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-16 21:30:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2021-11-16 21:30:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-16 21:30:27,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:27,725 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:27,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:27,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:27,943 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:27,943 INFO L85 PathProgramCache]: Analyzing trace with hash 507664470, now seen corresponding path program 1 times [2021-11-16 21:30:27,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:27,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086287121] [2021-11-16 21:30:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:27,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-16 21:30:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-16 21:30:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 21:30:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 21:30:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-16 21:30:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-16 21:30:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-16 21:30:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 21:30:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 21:30:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-16 21:30:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-16 21:30:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 32 proven. 35 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-16 21:30:28,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:28,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086287121] [2021-11-16 21:30:28,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086287121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:28,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929794950] [2021-11-16 21:30:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:28,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:28,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:30:28,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 21:30:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:28,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-16 21:30:28,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:30:28,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-16 21:30:28,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:30:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:30:28,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-16 21:30:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 149 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-16 21:30:33,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-16 21:30:34,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929794950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:30:34,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:30:34,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 11] total 42 [2021-11-16 21:30:34,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086059158] [2021-11-16 21:30:34,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:34,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-16 21:30:34,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-16 21:30:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1571, Unknown=1, NotChecked=0, Total=1722 [2021-11-16 21:30:34,168 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 42 states, 40 states have (on average 4.75) internal successors, (190), 40 states have internal predecessors, (190), 19 states have call successors, (49), 5 states have call predecessors, (49), 11 states have return successors, (48), 18 states have call predecessors, (48), 19 states have call successors, (48) [2021-11-16 21:30:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:36,201 INFO L93 Difference]: Finished difference Result 566 states and 714 transitions. [2021-11-16 21:30:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-16 21:30:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 4.75) internal successors, (190), 40 states have internal predecessors, (190), 19 states have call successors, (49), 5 states have call predecessors, (49), 11 states have return successors, (48), 18 states have call predecessors, (48), 19 states have call successors, (48) Word has length 148 [2021-11-16 21:30:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:36,216 INFO L225 Difference]: With dead ends: 566 [2021-11-16 21:30:36,216 INFO L226 Difference]: Without dead ends: 300 [2021-11-16 21:30:36,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 294 SyntacticMatches, 20 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=463, Invalid=5856, Unknown=1, NotChecked=0, Total=6320 [2021-11-16 21:30:36,218 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 165 mSDsluCounter, 3676 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 3855 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:36,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 3855 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1663 Invalid, 0 Unknown, 616 Unchecked, 0.9s Time] [2021-11-16 21:30:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-16 21:30:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 273. [2021-11-16 21:30:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 199 states have (on average 1.1658291457286432) internal successors, (232), 203 states have internal predecessors, (232), 50 states have call successors, (50), 21 states have call predecessors, (50), 23 states have return successors, (53), 48 states have call predecessors, (53), 49 states have call successors, (53) [2021-11-16 21:30:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 335 transitions. [2021-11-16 21:30:36,237 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 335 transitions. Word has length 148 [2021-11-16 21:30:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:36,237 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 335 transitions. [2021-11-16 21:30:36,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 4.75) internal successors, (190), 40 states have internal predecessors, (190), 19 states have call successors, (49), 5 states have call predecessors, (49), 11 states have return successors, (48), 18 states have call predecessors, (48), 19 states have call successors, (48) [2021-11-16 21:30:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 335 transitions. [2021-11-16 21:30:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-16 21:30:36,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:36,238 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:36,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:36,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:36,451 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1174644095, now seen corresponding path program 1 times [2021-11-16 21:30:36,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:36,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249253681] [2021-11-16 21:30:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:36,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:30:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:30:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:30:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:30:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 21:30:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:30:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-16 21:30:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-16 21:30:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-16 21:30:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 21:30:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-16 21:30:36,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:36,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249253681] [2021-11-16 21:30:36,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249253681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:36,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129184067] [2021-11-16 21:30:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:36,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:36,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:36,642 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:30:36,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-16 21:30:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-16 21:30:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-16 21:30:37,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:30:37,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129184067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:30:37,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:30:37,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2021-11-16 21:30:37,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800035796] [2021-11-16 21:30:37,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:30:37,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 21:30:37,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:37,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 21:30:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:30:37,154 INFO L87 Difference]: Start difference. First operand 273 states and 335 transitions. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-16 21:30:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:37,329 INFO L93 Difference]: Finished difference Result 496 states and 634 transitions. [2021-11-16 21:30:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-16 21:30:37,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 160 [2021-11-16 21:30:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:37,331 INFO L225 Difference]: With dead ends: 496 [2021-11-16 21:30:37,331 INFO L226 Difference]: Without dead ends: 306 [2021-11-16 21:30:37,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:30:37,332 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 22 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:37,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1050 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2021-11-16 21:30:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-16 21:30:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 288. [2021-11-16 21:30:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 212 states have (on average 1.169811320754717) internal successors, (248), 215 states have internal predecessors, (248), 50 states have call successors, (50), 21 states have call predecessors, (50), 25 states have return successors, (61), 51 states have call predecessors, (61), 49 states have call successors, (61) [2021-11-16 21:30:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 359 transitions. [2021-11-16 21:30:37,346 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 359 transitions. Word has length 160 [2021-11-16 21:30:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:37,347 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 359 transitions. [2021-11-16 21:30:37,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-16 21:30:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 359 transitions. [2021-11-16 21:30:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-16 21:30:37,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:37,348 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:37,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:37,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:37,565 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash 392113855, now seen corresponding path program 1 times [2021-11-16 21:30:37,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:37,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311597278] [2021-11-16 21:30:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:37,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:30:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:30:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:30:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:30:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-16 21:30:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 21:30:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-16 21:30:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-16 21:30:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-16 21:30:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 21:30:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-16 21:30:37,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:37,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311597278] [2021-11-16 21:30:37,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311597278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:37,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390894974] [2021-11-16 21:30:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:37,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:37,825 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:30:37,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-16 21:30:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:37,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-16 21:30:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:37,955 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 [2021-11-16 21:30:38,117 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:30:38,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:30:38,126 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 21:30:38,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-16 21:30:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:30:38,207 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-16 21:30:38,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 43 [2021-11-16 21:30:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 137 proven. 23 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-16 21:30:41,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:50,008 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 1605 treesize of output 1589 [2021-11-16 21:30:50,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390894974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:50,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:30:50,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-11-16 21:30:50,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150068065] [2021-11-16 21:30:50,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:30:50,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-16 21:30:50,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:30:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-16 21:30:50,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1286, Unknown=4, NotChecked=0, Total=1406 [2021-11-16 21:30:50,292 INFO L87 Difference]: Start difference. First operand 288 states and 359 transitions. Second operand has 28 states, 26 states have (on average 6.230769230769231) internal successors, (162), 28 states have internal predecessors, (162), 13 states have call successors, (34), 4 states have call predecessors, (34), 7 states have return successors, (33), 11 states have call predecessors, (33), 13 states have call successors, (33) [2021-11-16 21:30:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:30:50,901 INFO L93 Difference]: Finished difference Result 606 states and 794 transitions. [2021-11-16 21:30:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-16 21:30:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 6.230769230769231) internal successors, (162), 28 states have internal predecessors, (162), 13 states have call successors, (34), 4 states have call predecessors, (34), 7 states have return successors, (33), 11 states have call predecessors, (33), 13 states have call successors, (33) Word has length 160 [2021-11-16 21:30:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:30:50,904 INFO L225 Difference]: With dead ends: 606 [2021-11-16 21:30:50,904 INFO L226 Difference]: Without dead ends: 452 [2021-11-16 21:30:50,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 313 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=218, Invalid=2430, Unknown=4, NotChecked=0, Total=2652 [2021-11-16 21:30:50,905 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 69 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:30:50,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 3139 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 423 Invalid, 0 Unknown, 472 Unchecked, 0.3s Time] [2021-11-16 21:30:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-16 21:30:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 392. [2021-11-16 21:30:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 291 states have (on average 1.1546391752577319) internal successors, (336), 295 states have internal predecessors, (336), 66 states have call successors, (66), 28 states have call predecessors, (66), 34 states have return successors, (84), 68 states have call predecessors, (84), 65 states have call successors, (84) [2021-11-16 21:30:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 486 transitions. [2021-11-16 21:30:50,930 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 486 transitions. Word has length 160 [2021-11-16 21:30:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:30:50,930 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 486 transitions. [2021-11-16 21:30:50,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 6.230769230769231) internal successors, (162), 28 states have internal predecessors, (162), 13 states have call successors, (34), 4 states have call predecessors, (34), 7 states have return successors, (33), 11 states have call predecessors, (33), 13 states have call successors, (33) [2021-11-16 21:30:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 486 transitions. [2021-11-16 21:30:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-16 21:30:50,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:30:50,932 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:30:50,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-16 21:30:51,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:51,143 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:30:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:30:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2062694364, now seen corresponding path program 2 times [2021-11-16 21:30:51,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:30:51,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080153558] [2021-11-16 21:30:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:30:51,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:30:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:30:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:30:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:30:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:30:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:30:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:30:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:30:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:30:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:30:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:30:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:30:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:30:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 21:30:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-16 21:30:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:30:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-16 21:30:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-16 21:30:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:30:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-16 21:30:51,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:30:51,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080153558] [2021-11-16 21:30:51,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080153558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:30:51,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538218546] [2021-11-16 21:30:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:30:51,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:30:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:30:51,450 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:30:51,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-16 21:30:51,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:30:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:30:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-16 21:30:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:30:51,596 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 [2021-11-16 21:30:51,777 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:30:51,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:30:51,789 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 21:30:51,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-16 21:30:51,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:30:51,880 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-16 21:30:51,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 47 [2021-11-16 21:30:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-16 21:30:56,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:30:59,812 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 3172 treesize of output 3140 [2021-11-16 21:31:00,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538218546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:00,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:31:00,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-11-16 21:31:00,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881404129] [2021-11-16 21:31:00,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:31:00,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-16 21:31:00,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:31:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-16 21:31:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1595, Unknown=2, NotChecked=0, Total=1722 [2021-11-16 21:31:00,210 INFO L87 Difference]: Start difference. First operand 392 states and 486 transitions. Second operand has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 16 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (34), 15 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-16 21:31:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:31:01,381 INFO L93 Difference]: Finished difference Result 838 states and 1127 transitions. [2021-11-16 21:31:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-16 21:31:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 16 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (34), 15 states have call predecessors, (34), 16 states have call successors, (34) Word has length 171 [2021-11-16 21:31:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:31:01,384 INFO L225 Difference]: With dead ends: 838 [2021-11-16 21:31:01,384 INFO L226 Difference]: Without dead ends: 679 [2021-11-16 21:31:01,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 331 SyntacticMatches, 23 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=226, Invalid=3078, Unknown=2, NotChecked=0, Total=3306 [2021-11-16 21:31:01,385 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 90 mSDsluCounter, 4075 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 4330 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 804 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:31:01,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 4330 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1106 Invalid, 0 Unknown, 804 Unchecked, 0.6s Time] [2021-11-16 21:31:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-16 21:31:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 563. [2021-11-16 21:31:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 417 states have (on average 1.1630695443645085) internal successors, (485), 427 states have internal predecessors, (485), 94 states have call successors, (94), 35 states have call predecessors, (94), 51 states have return successors, (139), 100 states have call predecessors, (139), 93 states have call successors, (139) [2021-11-16 21:31:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 718 transitions. [2021-11-16 21:31:01,425 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 718 transitions. Word has length 171 [2021-11-16 21:31:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:31:01,425 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 718 transitions. [2021-11-16 21:31:01,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 16 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (34), 15 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-16 21:31:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 718 transitions. [2021-11-16 21:31:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-16 21:31:01,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:31:01,427 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:31:01,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-16 21:31:01,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-16 21:31:01,643 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:31:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:31:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash -328790038, now seen corresponding path program 1 times [2021-11-16 21:31:01,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:31:01,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306313684] [2021-11-16 21:31:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:01,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:31:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:31:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:31:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:31:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:31:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:31:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:31:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:31:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:31:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:31:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:31:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-16 21:31:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-16 21:31:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:31:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-16 21:31:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 21:31:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:31:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:31:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:31:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-16 21:31:01,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:31:01,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306313684] [2021-11-16 21:31:01,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306313684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:01,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454658239] [2021-11-16 21:31:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:01,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:31:01,792 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:31:01,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-16 21:31:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:01,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-16 21:31:01,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:31:02,000 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-16 21:31:02,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-16 21:31:02,016 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-16 21:31:02,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-16 21:31:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 179 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-16 21:31:21,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:31:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-16 21:31:22,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454658239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:31:22,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:31:22,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 11] total 33 [2021-11-16 21:31:22,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374912516] [2021-11-16 21:31:22,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:31:22,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-16 21:31:22,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:31:22,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-16 21:31:22,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=933, Unknown=3, NotChecked=0, Total=1056 [2021-11-16 21:31:22,574 INFO L87 Difference]: Start difference. First operand 563 states and 718 transitions. Second operand has 33 states, 31 states have (on average 5.709677419354839) internal successors, (177), 32 states have internal predecessors, (177), 14 states have call successors, (41), 5 states have call predecessors, (41), 10 states have return successors, (41), 13 states have call predecessors, (41), 14 states have call successors, (41) [2021-11-16 21:31:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:31:27,337 INFO L93 Difference]: Finished difference Result 924 states and 1181 transitions. [2021-11-16 21:31:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-16 21:31:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 5.709677419354839) internal successors, (177), 32 states have internal predecessors, (177), 14 states have call successors, (41), 5 states have call predecessors, (41), 10 states have return successors, (41), 13 states have call predecessors, (41), 14 states have call successors, (41) Word has length 172 [2021-11-16 21:31:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:31:27,340 INFO L225 Difference]: With dead ends: 924 [2021-11-16 21:31:27,340 INFO L226 Difference]: Without dead ends: 584 [2021-11-16 21:31:27,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 345 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=235, Invalid=2110, Unknown=7, NotChecked=0, Total=2352 [2021-11-16 21:31:27,342 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 147 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:31:27,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 2744 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 355 Unchecked, 0.2s Time] [2021-11-16 21:31:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-16 21:31:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 509. [2021-11-16 21:31:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 378 states have (on average 1.1746031746031746) internal successors, (444), 389 states have internal predecessors, (444), 83 states have call successors, (83), 35 states have call predecessors, (83), 47 states have return successors, (109), 84 states have call predecessors, (109), 82 states have call successors, (109) [2021-11-16 21:31:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 636 transitions. [2021-11-16 21:31:27,401 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 636 transitions. Word has length 172 [2021-11-16 21:31:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:31:27,402 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 636 transitions. [2021-11-16 21:31:27,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 5.709677419354839) internal successors, (177), 32 states have internal predecessors, (177), 14 states have call successors, (41), 5 states have call predecessors, (41), 10 states have return successors, (41), 13 states have call predecessors, (41), 14 states have call successors, (41) [2021-11-16 21:31:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 636 transitions. [2021-11-16 21:31:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-16 21:31:27,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:31:27,404 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:31:27,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-16 21:31:27,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-16 21:31:27,611 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:31:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:31:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash 918662150, now seen corresponding path program 1 times [2021-11-16 21:31:27,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:31:27,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337500978] [2021-11-16 21:31:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:27,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:31:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:31:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:31:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:31:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:31:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:31:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:31:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:31:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:31:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:31:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:31:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:31:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 21:31:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-16 21:31:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-16 21:31:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:31:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-16 21:31:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-16 21:31:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:31:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 29 proven. 24 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-16 21:31:27,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:31:27,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337500978] [2021-11-16 21:31:27,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337500978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:31:27,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969488271] [2021-11-16 21:31:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:31:27,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:31:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:31:27,993 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:31:27,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-16 21:31:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:31:28,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-16 21:31:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:31:28,217 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-16 21:31:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-16 21:31:28,227 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-16 21:31:28,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-16 21:32:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 167 proven. 66 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-16 21:32:03,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:32:25,253 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:32:35,532 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:33:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-16 21:33:00,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969488271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:33:00,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:33:00,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 32, 26] total 69 [2021-11-16 21:33:00,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870963362] [2021-11-16 21:33:00,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:33:00,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-16 21:33:00,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:33:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-16 21:33:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=4368, Unknown=16, NotChecked=0, Total=4692 [2021-11-16 21:33:00,245 INFO L87 Difference]: Start difference. First operand 509 states and 636 transitions. Second operand has 69 states, 66 states have (on average 3.5757575757575757) internal successors, (236), 60 states have internal predecessors, (236), 23 states have call successors, (52), 5 states have call predecessors, (52), 15 states have return successors, (51), 24 states have call predecessors, (51), 23 states have call successors, (51) [2021-11-16 21:33:13,475 WARN L227 SmtUtils]: Spent 10.29s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:33:23,928 WARN L227 SmtUtils]: Spent 10.29s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:34:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:22,153 INFO L93 Difference]: Finished difference Result 1425 states and 1868 transitions. [2021-11-16 21:34:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-16 21:34:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 66 states have (on average 3.5757575757575757) internal successors, (236), 60 states have internal predecessors, (236), 23 states have call successors, (52), 5 states have call predecessors, (52), 15 states have return successors, (51), 24 states have call predecessors, (51), 23 states have call successors, (51) Word has length 176 [2021-11-16 21:34:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:22,158 INFO L225 Difference]: With dead ends: 1425 [2021-11-16 21:34:22,158 INFO L226 Difference]: Without dead ends: 1146 [2021-11-16 21:34:22,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 338 SyntacticMatches, 18 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3596 ImplicationChecksByTransitivity, 165.1s TimeCoverageRelationStatistics Valid=844, Invalid=12467, Unknown=29, NotChecked=0, Total=13340 [2021-11-16 21:34:22,161 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 103 mSDsluCounter, 6248 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6419 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1207 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:22,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 6419 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 763 Invalid, 0 Unknown, 1207 Unchecked, 0.7s Time] [2021-11-16 21:34:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-16 21:34:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 894. [2021-11-16 21:34:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 678 states have (on average 1.182890855457227) internal successors, (802), 697 states have internal predecessors, (802), 128 states have call successors, (128), 53 states have call predecessors, (128), 87 states have return successors, (208), 143 states have call predecessors, (208), 127 states have call successors, (208) [2021-11-16 21:34:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1138 transitions. [2021-11-16 21:34:22,235 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1138 transitions. Word has length 176 [2021-11-16 21:34:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:22,235 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1138 transitions. [2021-11-16 21:34:22,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 66 states have (on average 3.5757575757575757) internal successors, (236), 60 states have internal predecessors, (236), 23 states have call successors, (52), 5 states have call predecessors, (52), 15 states have return successors, (51), 24 states have call predecessors, (51), 23 states have call successors, (51) [2021-11-16 21:34:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1138 transitions. [2021-11-16 21:34:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-16 21:34:22,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:22,237 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:34:22,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-16 21:34:22,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-16 21:34:22,451 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash -999523585, now seen corresponding path program 1 times [2021-11-16 21:34:22,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:22,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68255488] [2021-11-16 21:34:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:22,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:34:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:34:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:34:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:34:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:34:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:34:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 21:34:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-16 21:34:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-16 21:34:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-16 21:34:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-16 21:34:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 27 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-16 21:34:22,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:22,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68255488] [2021-11-16 21:34:22,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68255488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:22,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119515321] [2021-11-16 21:34:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:22,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:22,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:22,689 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:34:22,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-16 21:34:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-16 21:34:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:22,913 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-16 21:34:22,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-16 21:34:22,925 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-16 21:34:22,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-16 21:34:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 178 proven. 1 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-16 21:34:26,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:34:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 7 proven. 56 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-16 21:34:27,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119515321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:34:27,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:34:27,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 8] total 22 [2021-11-16 21:34:27,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973268583] [2021-11-16 21:34:27,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:34:27,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-16 21:34:27,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-16 21:34:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-16 21:34:27,219 INFO L87 Difference]: Start difference. First operand 894 states and 1138 transitions. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 20 states have internal predecessors, (127), 7 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (34), 8 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-16 21:34:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:27,429 INFO L93 Difference]: Finished difference Result 1795 states and 2383 transitions. [2021-11-16 21:34:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-16 21:34:27,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 20 states have internal predecessors, (127), 7 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (34), 8 states have call predecessors, (34), 7 states have call successors, (34) Word has length 187 [2021-11-16 21:34:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:27,433 INFO L225 Difference]: With dead ends: 1795 [2021-11-16 21:34:27,433 INFO L226 Difference]: Without dead ends: 1009 [2021-11-16 21:34:27,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 401 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-16 21:34:27,435 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 51 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:27,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 2077 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 388 Unchecked, 0.1s Time] [2021-11-16 21:34:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-11-16 21:34:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 966. [2021-11-16 21:34:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 741 states have (on average 1.1767881241565452) internal successors, (872), 751 states have internal predecessors, (872), 128 states have call successors, (128), 53 states have call predecessors, (128), 96 states have return successors, (235), 161 states have call predecessors, (235), 127 states have call successors, (235) [2021-11-16 21:34:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1235 transitions. [2021-11-16 21:34:27,516 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1235 transitions. Word has length 187 [2021-11-16 21:34:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:27,516 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1235 transitions. [2021-11-16 21:34:27,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 20 states have internal predecessors, (127), 7 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (34), 8 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-16 21:34:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1235 transitions. [2021-11-16 21:34:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-16 21:34:27,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:27,519 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:34:27,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-16 21:34:27,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-16 21:34:27,731 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 609279730, now seen corresponding path program 1 times [2021-11-16 21:34:27,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:27,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17569460] [2021-11-16 21:34:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:27,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:34:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:34:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:34:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:34:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:34:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:34:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-16 21:34:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-16 21:34:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-16 21:34:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-16 21:34:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-16 21:34:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-16 21:34:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 8 proven. 101 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-16 21:34:27,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:27,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17569460] [2021-11-16 21:34:27,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17569460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:27,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879667357] [2021-11-16 21:34:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:27,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:27,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:27,979 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:34:27,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-16 21:34:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 21:34:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-16 21:34:28,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:34:28,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879667357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:34:28,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:34:28,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-11-16 21:34:28,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328087275] [2021-11-16 21:34:28,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:34:28,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 21:34:28,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 21:34:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-16 21:34:28,387 INFO L87 Difference]: Start difference. First operand 966 states and 1235 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:34:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:28,462 INFO L93 Difference]: Finished difference Result 1772 states and 2347 transitions. [2021-11-16 21:34:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:34:28,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 197 [2021-11-16 21:34:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:28,465 INFO L225 Difference]: With dead ends: 1772 [2021-11-16 21:34:28,465 INFO L226 Difference]: Without dead ends: 954 [2021-11-16 21:34:28,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:34:28,467 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 3 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:28,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 518 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:34:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-11-16 21:34:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 951. [2021-11-16 21:34:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 731 states have (on average 1.158686730506156) internal successors, (847), 736 states have internal predecessors, (847), 128 states have call successors, (128), 53 states have call predecessors, (128), 91 states have return successors, (215), 161 states have call predecessors, (215), 127 states have call successors, (215) [2021-11-16 21:34:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1190 transitions. [2021-11-16 21:34:28,547 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1190 transitions. Word has length 197 [2021-11-16 21:34:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:28,547 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1190 transitions. [2021-11-16 21:34:28,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:34:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1190 transitions. [2021-11-16 21:34:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-16 21:34:28,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:28,549 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:34:28,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-16 21:34:28,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-16 21:34:28,753 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:28,753 INFO L85 PathProgramCache]: Analyzing trace with hash -358054337, now seen corresponding path program 1 times [2021-11-16 21:34:28,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:28,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279161832] [2021-11-16 21:34:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:28,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-16 21:34:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 21:34:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-16 21:34:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-16 21:34:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-16 21:34:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-16 21:34:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-16 21:34:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-16 21:34:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-16 21:34:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-16 21:34:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-16 21:34:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-16 21:34:28,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:28,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279161832] [2021-11-16 21:34:28,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279161832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:28,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080603052] [2021-11-16 21:34:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:28,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:28,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:28,941 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:34:28,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-16 21:34:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-16 21:34:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 195 proven. 11 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-16 21:34:29,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:34:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-16 21:34:30,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080603052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:34:30,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 21:34:30,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2021-11-16 21:34:30,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547404731] [2021-11-16 21:34:30,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 21:34:30,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-16 21:34:30,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-16 21:34:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-16 21:34:30,056 INFO L87 Difference]: Start difference. First operand 951 states and 1190 transitions. Second operand has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 13 states have call successors, (43), 2 states have call predecessors, (43), 6 states have return successors, (42), 10 states have call predecessors, (42), 13 states have call successors, (42) [2021-11-16 21:34:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:30,808 INFO L93 Difference]: Finished difference Result 1282 states and 1634 transitions. [2021-11-16 21:34:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:34:30,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 13 states have call successors, (43), 2 states have call predecessors, (43), 6 states have return successors, (42), 10 states have call predecessors, (42), 13 states have call successors, (42) Word has length 187 [2021-11-16 21:34:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:30,811 INFO L225 Difference]: With dead ends: 1282 [2021-11-16 21:34:30,811 INFO L226 Difference]: Without dead ends: 721 [2021-11-16 21:34:30,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 21:34:30,812 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 399 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:30,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1929 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-16 21:34:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-11-16 21:34:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 525. [2021-11-16 21:34:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 398 states have (on average 1.14321608040201) internal successors, (455), 399 states have internal predecessors, (455), 77 states have call successors, (77), 34 states have call predecessors, (77), 49 states have return successors, (108), 91 states have call predecessors, (108), 76 states have call successors, (108) [2021-11-16 21:34:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 640 transitions. [2021-11-16 21:34:30,857 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 640 transitions. Word has length 187 [2021-11-16 21:34:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:30,858 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 640 transitions. [2021-11-16 21:34:30,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 13 states have call successors, (43), 2 states have call predecessors, (43), 6 states have return successors, (42), 10 states have call predecessors, (42), 13 states have call successors, (42) [2021-11-16 21:34:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 640 transitions. [2021-11-16 21:34:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-16 21:34:30,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:30,860 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:34:30,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-16 21:34:31,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:31,075 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 682589078, now seen corresponding path program 1 times [2021-11-16 21:34:31,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:31,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379982717] [2021-11-16 21:34:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:31,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:34:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:34:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:34:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:34:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:34:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:34:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-16 21:34:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-16 21:34:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 21:34:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:34:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-16 21:34:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-16 21:34:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 41 proven. 96 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-16 21:34:31,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:31,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379982717] [2021-11-16 21:34:31,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379982717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:31,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282380823] [2021-11-16 21:34:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:31,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:31,689 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:34:31,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-16 21:34:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:31,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 21:34:31,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-16 21:34:32,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:34:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282380823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:34:32,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:34:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [27] total 30 [2021-11-16 21:34:32,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925445567] [2021-11-16 21:34:32,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:34:32,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:34:32,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:34:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:34:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2021-11-16 21:34:32,192 INFO L87 Difference]: Start difference. First operand 525 states and 640 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:34:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:34:32,237 INFO L93 Difference]: Finished difference Result 931 states and 1158 transitions. [2021-11-16 21:34:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:34:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 195 [2021-11-16 21:34:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:34:32,239 INFO L225 Difference]: With dead ends: 931 [2021-11-16 21:34:32,239 INFO L226 Difference]: Without dead ends: 470 [2021-11-16 21:34:32,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2021-11-16 21:34:32,240 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 0 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:34:32,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 703 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:34:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-16 21:34:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 275. [2021-11-16 21:34:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 204 states have (on average 1.1176470588235294) internal successors, (228), 207 states have internal predecessors, (228), 45 states have call successors, (45), 22 states have call predecessors, (45), 25 states have return successors, (53), 45 states have call predecessors, (53), 44 states have call successors, (53) [2021-11-16 21:34:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 326 transitions. [2021-11-16 21:34:32,262 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 326 transitions. Word has length 195 [2021-11-16 21:34:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:34:32,263 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 326 transitions. [2021-11-16 21:34:32,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-16 21:34:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 326 transitions. [2021-11-16 21:34:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-16 21:34:32,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:34:32,264 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:34:32,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-16 21:34:32,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:32,471 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:34:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:34:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -978512549, now seen corresponding path program 2 times [2021-11-16 21:34:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:34:32,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876245549] [2021-11-16 21:34:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:34:32,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:34:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:34:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:34:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:34:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:34:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:34:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:34:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:34:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:34:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:34:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:34:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-16 21:34:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 21:34:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:34:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:34:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:34:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:34:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:34:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 63 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-16 21:34:32,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:34:32,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876245549] [2021-11-16 21:34:32,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876245549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:34:32,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337177766] [2021-11-16 21:34:32,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:34:32,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:34:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:34:32,879 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:34:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-16 21:34:32,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-16 21:34:32,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:34:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-16 21:34:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:34:35,455 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_18| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_22|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_18|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_18| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_22|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_18|) 0)))) is different from true [2021-11-16 21:34:43,519 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:34:49,698 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:34:55,827 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:35:03,899 WARN L227 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-16 21:35:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-16 21:35:03,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 21:35:03,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337177766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:35:03,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:35:03,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 29 [2021-11-16 21:35:03,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242259348] [2021-11-16 21:35:03,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:35:03,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 21:35:03,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 21:35:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=681, Unknown=3, NotChecked=52, Total=812 [2021-11-16 21:35:03,937 INFO L87 Difference]: Start difference. First operand 275 states and 326 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-16 21:35:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:04,238 INFO L93 Difference]: Finished difference Result 429 states and 525 transitions. [2021-11-16 21:35:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-16 21:35:04,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 185 [2021-11-16 21:35:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:04,240 INFO L225 Difference]: With dead ends: 429 [2021-11-16 21:35:04,240 INFO L226 Difference]: Without dead ends: 303 [2021-11-16 21:35:04,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=112, Invalid=881, Unknown=3, NotChecked=60, Total=1056 [2021-11-16 21:35:04,241 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 65 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:04,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1263 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 189 Invalid, 0 Unknown, 419 Unchecked, 0.2s Time] [2021-11-16 21:35:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-16 21:35:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 280. [2021-11-16 21:35:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 210 states have (on average 1.119047619047619) internal successors, (235), 210 states have internal predecessors, (235), 45 states have call successors, (45), 24 states have call predecessors, (45), 24 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2021-11-16 21:35:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 329 transitions. [2021-11-16 21:35:04,260 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 329 transitions. Word has length 185 [2021-11-16 21:35:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:04,261 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 329 transitions. [2021-11-16 21:35:04,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-16 21:35:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 329 transitions. [2021-11-16 21:35:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-16 21:35:04,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:04,262 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:35:04,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-16 21:35:04,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:35:04,479 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1989629799, now seen corresponding path program 2 times [2021-11-16 21:35:04,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:04,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315882672] [2021-11-16 21:35:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:04,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:35:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:35:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:35:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:35:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:35:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:35:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:35:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-16 21:35:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 21:35:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:35:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:35:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-16 21:35:04,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:04,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315882672] [2021-11-16 21:35:04,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315882672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:35:04,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:35:04,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-16 21:35:04,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805035805] [2021-11-16 21:35:04,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:35:04,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-16 21:35:04,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-16 21:35:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:35:04,687 INFO L87 Difference]: Start difference. First operand 280 states and 329 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:35:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:04,885 INFO L93 Difference]: Finished difference Result 415 states and 502 transitions. [2021-11-16 21:35:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-16 21:35:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 185 [2021-11-16 21:35:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:04,886 INFO L225 Difference]: With dead ends: 415 [2021-11-16 21:35:04,887 INFO L226 Difference]: Without dead ends: 295 [2021-11-16 21:35:04,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:35:04,887 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 94 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:04,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1276 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 21:35:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-16 21:35:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 280. [2021-11-16 21:35:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 210 states have (on average 1.119047619047619) internal successors, (235), 210 states have internal predecessors, (235), 45 states have call successors, (45), 24 states have call predecessors, (45), 24 states have return successors, (48), 45 states have call predecessors, (48), 44 states have call successors, (48) [2021-11-16 21:35:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 328 transitions. [2021-11-16 21:35:04,913 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 328 transitions. Word has length 185 [2021-11-16 21:35:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:04,914 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 328 transitions. [2021-11-16 21:35:04,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-16 21:35:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 328 transitions. [2021-11-16 21:35:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-16 21:35:04,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:04,915 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:35:04,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-16 21:35:04,915 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:04,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1585352774, now seen corresponding path program 1 times [2021-11-16 21:35:04,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:04,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305452678] [2021-11-16 21:35:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:04,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:35:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:35:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:35:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:35:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:35:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:04,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:35:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:35:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-16 21:35:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 21:35:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:35:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:35:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-16 21:35:05,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:05,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305452678] [2021-11-16 21:35:05,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305452678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 21:35:05,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:35:05,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-16 21:35:05,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569635444] [2021-11-16 21:35:05,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:35:05,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:35:05,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 21:35:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:35:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:35:05,072 INFO L87 Difference]: Start difference. First operand 280 states and 328 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 21:35:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:35:05,145 INFO L93 Difference]: Finished difference Result 294 states and 343 transitions. [2021-11-16 21:35:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:35:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 188 [2021-11-16 21:35:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:35:05,146 INFO L225 Difference]: With dead ends: 294 [2021-11-16 21:35:05,147 INFO L226 Difference]: Without dead ends: 292 [2021-11-16 21:35:05,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-16 21:35:05,147 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 10 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:35:05,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1194 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:35:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-16 21:35:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2021-11-16 21:35:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.1162790697674418) internal successors, (240), 216 states have internal predecessors, (240), 46 states have call successors, (46), 25 states have call predecessors, (46), 26 states have return successors, (50), 46 states have call predecessors, (50), 45 states have call successors, (50) [2021-11-16 21:35:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 336 transitions. [2021-11-16 21:35:05,167 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 336 transitions. Word has length 188 [2021-11-16 21:35:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:35:05,167 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 336 transitions. [2021-11-16 21:35:05,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-16 21:35:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 336 transitions. [2021-11-16 21:35:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-16 21:35:05,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:35:05,169 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:35:05,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-16 21:35:05,169 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:35:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:35:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1702747420, now seen corresponding path program 2 times [2021-11-16 21:35:05,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:35:05,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389020172] [2021-11-16 21:35:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:35:05,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:35:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:35:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 21:35:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-16 21:35:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 21:35:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-16 21:35:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 21:35:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-16 21:35:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 21:35:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-16 21:35:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-16 21:35:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-16 21:35:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:35:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-16 21:35:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-16 21:35:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-16 21:35:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-16 21:35:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:35:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 62 proven. 75 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-16 21:35:05,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 21:35:05,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389020172] [2021-11-16 21:35:05,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389020172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 21:35:05,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286310161] [2021-11-16 21:35:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:35:05,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 21:35:05,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:35:05,860 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 21:35:05,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-16 21:35:06,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:35:06,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:35:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 181 conjunts are in the unsatisfiable core [2021-11-16 21:35:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:35:06,061 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 [2021-11-16 21:35:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:35:06,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:35:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-16 21:35:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-16 21:35:06,273 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-16 21:35:06,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-16 21:35:06,384 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-16 21:35:06,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 80 [2021-11-16 21:35:06,394 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-16 21:35:06,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 84 [2021-11-16 21:35:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 53 proven. 112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-16 21:35:12,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:35:25,464 WARN L227 SmtUtils]: Spent 9.76s on a formula simplification. DAG size of input: 663 DAG size of output: 323 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-16 21:35:25,465 INFO L354 Elim1Store]: treesize reduction 23607, result has 25.0 percent of original size [2021-11-16 21:35:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 21 new quantified variables, introduced 108 case distinctions, treesize of input 6587441872 treesize of output 6249480147 Killed by 15