./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_remove_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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:59:30,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:59:30,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:59:30,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:59:30,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:59:30,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:59:30,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:59:30,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:59:30,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:59:30,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:59:30,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:59:30,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:59:30,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:59:30,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:59:30,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:59:30,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:59:30,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:59:30,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:59:30,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:59:30,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:59:30,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:59:30,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:59:30,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:59:30,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:59:30,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:59:30,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:59:30,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:59:30,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:59:30,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:59:30,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:59:30,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:59:30,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:59:30,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:59:30,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:59:30,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:59:30,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:59:30,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:59:30,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:59:30,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:59:30,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:59:30,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:59:30,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 00:59:30,449 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:59:30,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:59:30,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:59:30,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:59:30,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:59:30,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:59:30,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:59:30,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:59:30,454 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:59:30,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:59:30,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 00:59:30,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:59:30,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:59:30,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:59:30,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:59:30,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:59:30,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:59:30,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:59:30,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:59:30,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:59:30,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:59:30,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:59:30,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:59:30,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:59:30,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:59:30,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 00:59:30,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 00:59:30,458 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:59:30,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:59:30,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:59:30,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:59:30,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2021-12-18 00:59:30,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:59:30,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:59:30,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:59:30,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:59:30,736 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:59:30,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-12-18 00:59:30,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba04d112a/1204fcfbeabd43a6ba3c465d8479ab86/FLAG9bc414245 [2021-12-18 00:59:31,390 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:59:31,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2021-12-18 00:59:31,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba04d112a/1204fcfbeabd43a6ba3c465d8479ab86/FLAG9bc414245 [2021-12-18 00:59:31,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba04d112a/1204fcfbeabd43a6ba3c465d8479ab86 [2021-12-18 00:59:31,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:59:31,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:59:31,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:59:31,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:59:31,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:59:31,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:59:31" (1/1) ... [2021-12-18 00:59:31,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58837852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:31, skipping insertion in model container [2021-12-18 00:59:31,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:59:31" (1/1) ... [2021-12-18 00:59:31,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:59:31,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:59:31,953 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_remove_harness.i[4496,4509] [2021-12-18 00:59:31,958 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_remove_harness.i[4556,4569] [2021-12-18 00:59:32,411 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,411 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,412 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,412 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,413 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,421 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,421 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,422 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,423 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,424 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,424 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,425 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,425 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:59:32,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:59:32,593 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:59:32,594 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:59:32,596 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:59:32,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:59:32,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:59:32,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:59:32,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:59:32,599 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:59:32,703 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:59:32,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:59:32,744 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:59:32,752 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_remove_harness.i[4496,4509] [2021-12-18 00:59:32,753 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_remove_harness.i[4556,4569] [2021-12-18 00:59:32,772 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,773 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,773 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,773 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,802 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,803 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,803 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,804 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,804 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:59:32,822 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:59:32,823 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:59:32,823 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:59:32,824 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:59:32,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:59:32,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:59:32,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:59:32,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:59:32,826 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:59:32,826 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:59:32,838 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:59:32,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:59:32,954 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:59:32,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32 WrapperNode [2021-12-18 00:59:32,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:59:32,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:59:32,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:59:32,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:59:32,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,055 INFO L137 Inliner]: procedures = 679, calls = 1048, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 89 [2021-12-18 00:59:33,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:59:33,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:59:33,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:59:33,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:59:33,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:59:33,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:59:33,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:59:33,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:59:33,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (1/1) ... [2021-12-18 00:59:33,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:59:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:33,142 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) [2021-12-18 00:59:33,148 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 [2021-12-18 00:59:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-18 00:59:33,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-18 00:59:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-12-18 00:59:33,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-12-18 00:59:33,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:59:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 00:59:33,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:59:33,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:59:33,175 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:59:33,175 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:59:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:59:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:59:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:59:33,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:59:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 00:59:33,176 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 00:59:33,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:59:33,177 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:59:33,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:59:33,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:59:33,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:59:33,177 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-18 00:59:33,177 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-18 00:59:33,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 00:59:33,314 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:59:33,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:59:33,482 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:59:33,486 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:59:33,486 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 00:59:33,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:59:33 BoogieIcfgContainer [2021-12-18 00:59:33,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:59:33,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:59:33,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:59:33,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:59:33,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:59:31" (1/3) ... [2021-12-18 00:59:33,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4188f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:59:33, skipping insertion in model container [2021-12-18 00:59:33,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:59:32" (2/3) ... [2021-12-18 00:59:33,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4188f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:59:33, skipping insertion in model container [2021-12-18 00:59:33,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:59:33" (3/3) ... [2021-12-18 00:59:33,493 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2021-12-18 00:59:33,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:59:33,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:59:33,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:59:33,526 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 [2021-12-18 00:59:33,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:59:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-18 00:59:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 00:59:33,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:33,540 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:59:33,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1155526354, now seen corresponding path program 1 times [2021-12-18 00:59:33,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:33,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979086078] [2021-12-18 00:59:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:33,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:33,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:33,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:33,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:59:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:33,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:33,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979086078] [2021-12-18 00:59:33,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979086078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:33,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:59:33,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 00:59:33,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584755387] [2021-12-18 00:59:33,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:33,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:59:33,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:59:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:59:33,956 INFO L87 Difference]: Start difference. First operand has 74 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-18 00:59:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:34,005 INFO L93 Difference]: Finished difference Result 147 states and 204 transitions. [2021-12-18 00:59:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:59:34,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-12-18 00:59:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:34,015 INFO L225 Difference]: With dead ends: 147 [2021-12-18 00:59:34,016 INFO L226 Difference]: Without dead ends: 73 [2021-12-18 00:59:34,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:59:34,023 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 3 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:34,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 261 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:59:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-18 00:59:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-18 00:59:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 00:59:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-12-18 00:59:34,054 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 48 [2021-12-18 00:59:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:34,054 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-12-18 00:59:34,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-18 00:59:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-12-18 00:59:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 00:59:34,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:34,056 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:59:34,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 00:59:34,057 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash 209823880, now seen corresponding path program 1 times [2021-12-18 00:59:34,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:34,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395742136] [2021-12-18 00:59:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:34,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 00:59:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:59:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:34,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395742136] [2021-12-18 00:59:34,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395742136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:34,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:59:34,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 00:59:34,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142294426] [2021-12-18 00:59:34,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:34,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:59:34,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:59:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:59:34,299 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:34,579 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2021-12-18 00:59:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:59:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-18 00:59:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:34,584 INFO L225 Difference]: With dead ends: 143 [2021-12-18 00:59:34,584 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 00:59:34,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:59:34,587 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 68 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:34,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 244 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:59:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 00:59:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-12-18 00:59:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-12-18 00:59:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-18 00:59:34,612 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 54 [2021-12-18 00:59:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:34,612 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-18 00:59:34,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-18 00:59:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 00:59:34,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:34,616 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:59:34,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 00:59:34,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash 637356428, now seen corresponding path program 1 times [2021-12-18 00:59:34,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:34,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810265699] [2021-12-18 00:59:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:34,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 00:59:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:59:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:34,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:34,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810265699] [2021-12-18 00:59:34,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810265699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:34,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:59:34,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:59:34,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502787960] [2021-12-18 00:59:34,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:34,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:59:34,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:59:34,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:59:34,818 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-18 00:59:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:35,030 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-12-18 00:59:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:59:35,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-12-18 00:59:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:35,034 INFO L225 Difference]: With dead ends: 87 [2021-12-18 00:59:35,034 INFO L226 Difference]: Without dead ends: 85 [2021-12-18 00:59:35,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:59:35,041 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 46 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:35,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 267 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:59:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-18 00:59:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-12-18 00:59:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-18 00:59:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-12-18 00:59:35,060 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 54 [2021-12-18 00:59:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:35,061 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-12-18 00:59:35,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-18 00:59:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-12-18 00:59:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 00:59:35,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:35,063 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:59:35,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 00:59:35,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2089548669, now seen corresponding path program 1 times [2021-12-18 00:59:35,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:35,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231779655] [2021-12-18 00:59:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:35,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 00:59:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:59:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:35,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231779655] [2021-12-18 00:59:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231779655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:35,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:59:35,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:59:35,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332356617] [2021-12-18 00:59:35,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:35,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:59:35,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:59:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:59:35,326 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:35,484 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2021-12-18 00:59:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:59:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-12-18 00:59:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:35,485 INFO L225 Difference]: With dead ends: 145 [2021-12-18 00:59:35,485 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 00:59:35,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:59:35,487 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:35,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 177 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:59:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 00:59:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-18 00:59:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.169811320754717) internal successors, (62), 56 states have internal predecessors, (62), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-18 00:59:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-12-18 00:59:35,493 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 54 [2021-12-18 00:59:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:35,494 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-12-18 00:59:35,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-18 00:59:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-12-18 00:59:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 00:59:35,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:35,495 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:59:35,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 00:59:35,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:35,496 INFO L85 PathProgramCache]: Analyzing trace with hash -247571742, now seen corresponding path program 1 times [2021-12-18 00:59:35,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:35,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572183462] [2021-12-18 00:59:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:35,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 00:59:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-18 00:59:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:35,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:35,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572183462] [2021-12-18 00:59:35,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572183462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:35,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59087507] [2021-12-18 00:59:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:35,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:35,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:35,708 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) [2021-12-18 00:59:35,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 00:59:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 00:59:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:36,036 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:59:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:36,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:36,706 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 14 treesize of output 12 [2021-12-18 00:59:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 24 [2021-12-18 00:59:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:36,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59087507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:36,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:36,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2021-12-18 00:59:36,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978918469] [2021-12-18 00:59:36,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:36,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 00:59:36,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 00:59:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-18 00:59:36,799 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 00:59:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:37,190 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2021-12-18 00:59:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:59:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2021-12-18 00:59:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:37,191 INFO L225 Difference]: With dead ends: 150 [2021-12-18 00:59:37,191 INFO L226 Difference]: Without dead ends: 87 [2021-12-18 00:59:37,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-12-18 00:59:37,192 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 39 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:37,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 389 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 328 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2021-12-18 00:59:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-18 00:59:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-12-18 00:59:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-18 00:59:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-12-18 00:59:37,197 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 55 [2021-12-18 00:59:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:37,197 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-12-18 00:59:37,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-18 00:59:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-12-18 00:59:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 00:59:37,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:37,198 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:59:37,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 00:59:37,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:37,406 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:37,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138147, now seen corresponding path program 2 times [2021-12-18 00:59:37,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:37,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667393885] [2021-12-18 00:59:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:37,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 00:59:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:59:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:37,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667393885] [2021-12-18 00:59:37,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667393885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339578635] [2021-12-18 00:59:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:59:37,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:37,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:37,602 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) [2021-12-18 00:59:37,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 00:59:37,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:59:37,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:59:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 00:59:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:37,971 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 00:59:37,996 INFO L354 Elim1Store]: treesize reduction 30, result has 25.0 percent of original size [2021-12-18 00:59:37,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-18 00:59:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:38,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:38,622 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 17 treesize of output 15 [2021-12-18 00:59:38,715 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 20 treesize of output 18 [2021-12-18 00:59:38,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 148 treesize of output 144 [2021-12-18 00:59:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:38,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339578635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:38,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:38,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 9] total 25 [2021-12-18 00:59:38,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20493009] [2021-12-18 00:59:38,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:38,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 00:59:38,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:38,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 00:59:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-12-18 00:59:38,841 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 25 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-18 00:59:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:39,434 INFO L93 Difference]: Finished difference Result 152 states and 184 transitions. [2021-12-18 00:59:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 00:59:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56 [2021-12-18 00:59:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:39,436 INFO L225 Difference]: With dead ends: 152 [2021-12-18 00:59:39,436 INFO L226 Difference]: Without dead ends: 89 [2021-12-18 00:59:39,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 00:59:39,437 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 73 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:39,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 479 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 545 Invalid, 0 Unknown, 281 Unchecked, 0.3s Time] [2021-12-18 00:59:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-18 00:59:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-12-18 00:59:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-18 00:59:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-12-18 00:59:39,463 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 56 [2021-12-18 00:59:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:39,463 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-12-18 00:59:39,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-18 00:59:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-12-18 00:59:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 00:59:39,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:39,464 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:59:39,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:39,664 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,SelfDestructingSolverStorable5 [2021-12-18 00:59:39,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:39,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1632439042, now seen corresponding path program 3 times [2021-12-18 00:59:39,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:39,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649604369] [2021-12-18 00:59:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:39,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 00:59:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-18 00:59:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:39,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649604369] [2021-12-18 00:59:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649604369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584474697] [2021-12-18 00:59:39,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 00:59:39,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:39,877 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) [2021-12-18 00:59:39,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 00:59:40,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 00:59:40,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:59:40,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 00:59:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:40,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584474697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:40,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:40,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 7] total 21 [2021-12-18 00:59:40,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434568922] [2021-12-18 00:59:40,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:40,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 00:59:40,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 00:59:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-12-18 00:59:40,930 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 21 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 5 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-18 00:59:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:41,583 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2021-12-18 00:59:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 00:59:41,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 5 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 57 [2021-12-18 00:59:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:41,585 INFO L225 Difference]: With dead ends: 154 [2021-12-18 00:59:41,585 INFO L226 Difference]: Without dead ends: 89 [2021-12-18 00:59:41,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2021-12-18 00:59:41,586 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 89 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:41,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 438 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 00:59:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-18 00:59:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-18 00:59:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-18 00:59:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2021-12-18 00:59:41,591 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 57 [2021-12-18 00:59:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:41,591 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2021-12-18 00:59:41,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 5 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-18 00:59:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2021-12-18 00:59:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 00:59:41,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:41,592 INFO L514 BasicCegarLoop]: trace histogram [8, 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] [2021-12-18 00:59:41,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:41,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:41,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash 156675, now seen corresponding path program 4 times [2021-12-18 00:59:41,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:41,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105680650] [2021-12-18 00:59:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:41,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:41,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-18 00:59:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:41,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:41,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:41,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:41,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-18 00:59:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:59:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:42,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105680650] [2021-12-18 00:59:42,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105680650] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228300136] [2021-12-18 00:59:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 00:59:42,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:42,143 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) [2021-12-18 00:59:42,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 00:59:42,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 00:59:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:59:42,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 00:59:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:42,518 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 00:59:42,607 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-12-18 00:59:42,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 00:59:42,689 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-12-18 00:59:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 00:59:42,783 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-12-18 00:59:42,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 00:59:42,858 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-12-18 00:59:42,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 00:59:42,959 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-12-18 00:59:42,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 00:59:43,046 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-12-18 00:59:43,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 00:59:43,134 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-12-18 00:59:43,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-18 00:59:43,679 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr680_37_66| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-18 00:59:43,680 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr680_37_66| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-18 00:59:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:59:43,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 01:00:59,034 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 49 treesize of output 47 [2021-12-18 01:00:59,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1275592690 treesize of output 1275068402 Killed by 15