./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 13:37:17,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 13:37:17,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 13:37:17,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 13:37:17,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 13:37:17,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 13:37:17,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 13:37:17,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 13:37:17,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 13:37:17,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 13:37:17,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 13:37:17,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 13:37:17,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 13:37:17,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 13:37:17,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 13:37:17,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 13:37:17,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 13:37:17,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 13:37:17,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 13:37:17,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 13:37:17,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 13:37:17,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 13:37:17,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 13:37:17,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 13:37:17,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 13:37:17,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 13:37:17,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 13:37:17,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 13:37:17,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 13:37:17,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 13:37:17,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 13:37:17,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 13:37:17,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 13:37:17,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 13:37:17,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 13:37:17,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 13:37:17,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 13:37:17,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 13:37:17,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 13:37:17,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 13:37:17,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 13:37:17,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 13:37:17,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 13:37:17,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 13:37:17,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 13:37:17,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 13:37:17,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 13:37:17,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 13:37:17,414 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 13:37:17,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 13:37:17,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 13:37:17,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 13:37:17,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 13:37:17,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 13:37:17,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 13:37:17,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 13:37:17,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 13:37:17,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 13:37:17,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 13:37:17,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 13:37:17,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 13:37:17,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:37:17,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 13:37:17,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 13:37:17,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 13:37:17,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 13:37:17,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 13:37:17,418 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 13:37:17,418 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 13:37:17,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 13:37:17,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 13:37:17,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2021-11-02 13:37:17,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 13:37:17,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 13:37:17,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 13:37:17,642 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 13:37:17,643 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 13:37:17,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-02 13:37:17,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed456773e/0735fb4e96c543de8e28ea83591f2450/FLAG53368feb8 [2021-11-02 13:37:18,281 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 13:37:18,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-02 13:37:18,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed456773e/0735fb4e96c543de8e28ea83591f2450/FLAG53368feb8 [2021-11-02 13:37:18,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed456773e/0735fb4e96c543de8e28ea83591f2450 [2021-11-02 13:37:18,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 13:37:18,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 13:37:18,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 13:37:18,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 13:37:18,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 13:37:18,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:37:18" (1/1) ... [2021-11-02 13:37:18,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d0c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:18, skipping insertion in model container [2021-11-02 13:37:18,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:37:18" (1/1) ... [2021-11-02 13:37:18,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 13:37:18,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 13:37:18,997 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-11-02 13:37:19,002 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-11-02 13:37:19,022 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:37:19,027 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:37:19,457 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,457 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,458 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,459 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,460 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,474 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,477 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,479 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,479 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,482 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,482 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,483 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,483 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,663 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:37:19,664 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:37:19,664 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:37:19,665 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:37:19,666 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:37:19,666 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:37:19,666 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:37:19,667 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:37:19,671 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:37:19,671 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:37:19,748 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:37:19,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:37:19,779 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 13:37:19,795 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2021-11-02 13:37:19,795 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2021-11-02 13:37:19,796 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:37:19,797 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:37:19,825 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,826 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,827 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,827 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,833 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,834 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,834 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,835 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,835 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,836 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,836 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,836 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:37:19,925 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:37:19,925 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:37:19,926 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:37:19,926 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:37:19,926 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:37:19,927 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:37:19,927 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:37:19,927 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:37:19,928 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:37:19,928 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:37:19,976 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:37:19,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:37:20,105 INFO L208 MainTranslator]: Completed translation [2021-11-02 13:37:20,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20 WrapperNode [2021-11-02 13:37:20,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 13:37:20,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 13:37:20,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 13:37:20,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 13:37:20,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 13:37:20,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 13:37:20,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 13:37:20,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 13:37:20,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 13:37:20,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 13:37:20,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 13:37:20,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 13:37:20,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (1/1) ... [2021-11-02 13:37:20,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:37:20,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:37:20,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 13:37:20,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 13:37:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 13:37:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 13:37:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 13:37:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 13:37:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 13:37:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 13:37:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 13:37:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 13:37:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 13:37:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 13:37:20,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 13:37:20,979 INFO L299 CfgBuilder]: Removed 119 assume(true) statements. [2021-11-02 13:37:20,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:37:20 BoogieIcfgContainer [2021-11-02 13:37:20,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 13:37:20,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 13:37:20,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 13:37:20,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 13:37:20,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 01:37:18" (1/3) ... [2021-11-02 13:37:20,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514f2530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:37:20, skipping insertion in model container [2021-11-02 13:37:20,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:37:20" (2/3) ... [2021-11-02 13:37:20,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514f2530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:37:20, skipping insertion in model container [2021-11-02 13:37:20,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:37:20" (3/3) ... [2021-11-02 13:37:20,986 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2021-11-02 13:37:20,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 13:37:20,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-02 13:37:21,023 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 13:37:21,030 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 13:37:21,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-02 13:37:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 13:37:21,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:21,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:21,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash 170416363, now seen corresponding path program 1 times [2021-11-02 13:37:21,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:21,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841644342] [2021-11-02 13:37:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:21,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:21,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:21,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841644342] [2021-11-02 13:37:21,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841644342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:21,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:21,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 13:37:21,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606070526] [2021-11-02 13:37:21,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 13:37:21,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 13:37:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:37:21,329 INFO L87 Difference]: Start difference. First operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:21,649 INFO L93 Difference]: Finished difference Result 430 states and 629 transitions. [2021-11-02 13:37:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 13:37:21,651 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 13:37:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:21,661 INFO L225 Difference]: With dead ends: 430 [2021-11-02 13:37:21,668 INFO L226 Difference]: Without dead ends: 212 [2021-11-02 13:37:21,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:37:21,674 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 230.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.74ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:21,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 286 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 283.74ms Time] [2021-11-02 13:37:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-02 13:37:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-02 13:37:21,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.391089108910891) internal successors, (281), 211 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 281 transitions. [2021-11-02 13:37:21,703 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 281 transitions. Word has length 56 [2021-11-02 13:37:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:21,704 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 281 transitions. [2021-11-02 13:37:21,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 281 transitions. [2021-11-02 13:37:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 13:37:21,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:21,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:21,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 13:37:21,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash 828944299, now seen corresponding path program 1 times [2021-11-02 13:37:21,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:21,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398647165] [2021-11-02 13:37:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:21,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:21,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:21,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398647165] [2021-11-02 13:37:21,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398647165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:21,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:21,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:37:21,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438635312] [2021-11-02 13:37:21,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:37:21,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:37:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:37:21,819 INFO L87 Difference]: Start difference. First operand 212 states and 281 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:22,297 INFO L93 Difference]: Finished difference Result 462 states and 632 transitions. [2021-11-02 13:37:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:37:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 13:37:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:22,300 INFO L225 Difference]: With dead ends: 462 [2021-11-02 13:37:22,300 INFO L226 Difference]: Without dead ends: 272 [2021-11-02 13:37:22,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.19ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:22,302 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 354.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 449.39ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:22,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 958 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [17 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 449.39ms Time] [2021-11-02 13:37:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-02 13:37:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2021-11-02 13:37:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 212 states have (on average 1.3726415094339623) internal successors, (291), 221 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 291 transitions. [2021-11-02 13:37:22,316 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 291 transitions. Word has length 56 [2021-11-02 13:37:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:22,317 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 291 transitions. [2021-11-02 13:37:22,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 291 transitions. [2021-11-02 13:37:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 13:37:22,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:22,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:22,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 13:37:22,320 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:22,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:22,323 INFO L85 PathProgramCache]: Analyzing trace with hash 434577513, now seen corresponding path program 1 times [2021-11-02 13:37:22,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:22,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490829889] [2021-11-02 13:37:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:22,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:22,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:22,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490829889] [2021-11-02 13:37:22,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490829889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:22,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:22,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:37:22,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196951616] [2021-11-02 13:37:22,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:37:22,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:37:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:37:22,457 INFO L87 Difference]: Start difference. First operand 222 states and 291 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:22,808 INFO L93 Difference]: Finished difference Result 458 states and 617 transitions. [2021-11-02 13:37:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:37:22,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 13:37:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:22,810 INFO L225 Difference]: With dead ends: 458 [2021-11-02 13:37:22,810 INFO L226 Difference]: Without dead ends: 262 [2021-11-02 13:37:22,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.89ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:22,815 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 260.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.44ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:22,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 925 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [17 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 333.44ms Time] [2021-11-02 13:37:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-02 13:37:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 232. [2021-11-02 13:37:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 222 states have (on average 1.3558558558558558) internal successors, (301), 231 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 301 transitions. [2021-11-02 13:37:22,830 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 301 transitions. Word has length 56 [2021-11-02 13:37:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:22,830 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 301 transitions. [2021-11-02 13:37:22,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 301 transitions. [2021-11-02 13:37:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 13:37:22,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:22,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:22,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 13:37:22,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1809405785, now seen corresponding path program 1 times [2021-11-02 13:37:22,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:22,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748762650] [2021-11-02 13:37:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:22,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:22,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:22,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748762650] [2021-11-02 13:37:22,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748762650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:22,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:22,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:37:22,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720657926] [2021-11-02 13:37:22,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:37:22,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:37:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:37:22,881 INFO L87 Difference]: Start difference. First operand 232 states and 301 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:23,264 INFO L93 Difference]: Finished difference Result 454 states and 602 transitions. [2021-11-02 13:37:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:37:23,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 13:37:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:23,266 INFO L225 Difference]: With dead ends: 454 [2021-11-02 13:37:23,266 INFO L226 Difference]: Without dead ends: 252 [2021-11-02 13:37:23,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.54ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:23,269 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 301.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.20ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:23,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 881 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [24 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 362.20ms Time] [2021-11-02 13:37:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-02 13:37:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2021-11-02 13:37:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 237 states have (on average 1.3333333333333333) internal successors, (316), 246 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 316 transitions. [2021-11-02 13:37:23,277 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 316 transitions. Word has length 56 [2021-11-02 13:37:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:23,281 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 316 transitions. [2021-11-02 13:37:23,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 316 transitions. [2021-11-02 13:37:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 13:37:23,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:23,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:23,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 13:37:23,288 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1534646171, now seen corresponding path program 1 times [2021-11-02 13:37:23,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:23,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242454828] [2021-11-02 13:37:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:23,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:23,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:23,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242454828] [2021-11-02 13:37:23,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242454828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:23,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:23,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:37:23,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905000470] [2021-11-02 13:37:23,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:37:23,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:37:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:23,394 INFO L87 Difference]: Start difference. First operand 247 states and 316 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:23,698 INFO L93 Difference]: Finished difference Result 448 states and 574 transitions. [2021-11-02 13:37:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:37:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 13:37:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:23,699 INFO L225 Difference]: With dead ends: 448 [2021-11-02 13:37:23,699 INFO L226 Difference]: Without dead ends: 239 [2021-11-02 13:37:23,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.31ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:37:23,700 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 515 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.67ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 270.08ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:23,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 0 Invalid, 579 Unknown, 0 Unchecked, 2.67ms Time], IncrementalHoareTripleChecker [14 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 270.08ms Time] [2021-11-02 13:37:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-02 13:37:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-02 13:37:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 229 states have (on average 1.3275109170305677) internal successors, (304), 238 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-11-02 13:37:23,716 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 56 [2021-11-02 13:37:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:23,717 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-11-02 13:37:23,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-11-02 13:37:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 13:37:23,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:23,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:23,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 13:37:23,718 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1858303597, now seen corresponding path program 1 times [2021-11-02 13:37:23,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:23,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707790307] [2021-11-02 13:37:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:23,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:23,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:23,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707790307] [2021-11-02 13:37:23,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707790307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:23,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:23,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:37:23,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65580048] [2021-11-02 13:37:23,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:37:23,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:37:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:37:23,799 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:24,223 INFO L93 Difference]: Finished difference Result 524 states and 656 transitions. [2021-11-02 13:37:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:37:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 13:37:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:24,225 INFO L225 Difference]: With dead ends: 524 [2021-11-02 13:37:24,225 INFO L226 Difference]: Without dead ends: 316 [2021-11-02 13:37:24,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.43ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:24,226 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 400.99ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:24,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 832 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [6 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 400.99ms Time] [2021-11-02 13:37:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-02 13:37:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 229. [2021-11-02 13:37:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 219 states have (on average 1.3059360730593608) internal successors, (286), 228 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 286 transitions. [2021-11-02 13:37:24,230 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 286 transitions. Word has length 56 [2021-11-02 13:37:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:24,231 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 286 transitions. [2021-11-02 13:37:24,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 286 transitions. [2021-11-02 13:37:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 13:37:24,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:24,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:24,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 13:37:24,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1990287981, now seen corresponding path program 1 times [2021-11-02 13:37:24,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:24,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398484430] [2021-11-02 13:37:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:24,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:24,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:24,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398484430] [2021-11-02 13:37:24,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398484430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:24,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:24,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:37:24,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218296177] [2021-11-02 13:37:24,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:37:24,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:37:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:37:24,288 INFO L87 Difference]: Start difference. First operand 229 states and 286 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:24,688 INFO L93 Difference]: Finished difference Result 534 states and 662 transitions. [2021-11-02 13:37:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:37:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 13:37:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:24,690 INFO L225 Difference]: With dead ends: 534 [2021-11-02 13:37:24,691 INFO L226 Difference]: Without dead ends: 342 [2021-11-02 13:37:24,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.53ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:37:24,692 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1114 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.54ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 357.76ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:24,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 0 Invalid, 606 Unknown, 0 Unchecked, 3.54ms Time], IncrementalHoareTripleChecker [30 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 357.76ms Time] [2021-11-02 13:37:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-02 13:37:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 229. [2021-11-02 13:37:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 219 states have (on average 1.2876712328767124) internal successors, (282), 228 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-11-02 13:37:24,696 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 60 [2021-11-02 13:37:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:24,697 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-11-02 13:37:24,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-11-02 13:37:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 13:37:24,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:24,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:24,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 13:37:24,697 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash 49668941, now seen corresponding path program 1 times [2021-11-02 13:37:24,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:24,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382745599] [2021-11-02 13:37:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:24,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:24,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:24,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382745599] [2021-11-02 13:37:24,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382745599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:24,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:24,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:37:24,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134690543] [2021-11-02 13:37:24,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:37:24,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:37:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:37:24,775 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:25,391 INFO L93 Difference]: Finished difference Result 723 states and 890 transitions. [2021-11-02 13:37:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 13:37:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 13:37:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:25,393 INFO L225 Difference]: With dead ends: 723 [2021-11-02 13:37:25,393 INFO L226 Difference]: Without dead ends: 530 [2021-11-02 13:37:25,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.66ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-02 13:37:25,394 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2036 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 427.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 535.50ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:25,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2036 Valid, 0 Invalid, 909 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [73 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 535.50ms Time] [2021-11-02 13:37:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-02 13:37:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 233. [2021-11-02 13:37:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 223 states have (on average 1.2825112107623318) internal successors, (286), 232 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 286 transitions. [2021-11-02 13:37:25,400 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 286 transitions. Word has length 64 [2021-11-02 13:37:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:25,400 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 286 transitions. [2021-11-02 13:37:25,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 286 transitions. [2021-11-02 13:37:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 13:37:25,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:25,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:25,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 13:37:25,401 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1788737394, now seen corresponding path program 1 times [2021-11-02 13:37:25,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:25,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311272968] [2021-11-02 13:37:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:25,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:25,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:25,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311272968] [2021-11-02 13:37:25,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311272968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:25,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:25,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:37:25,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131556926] [2021-11-02 13:37:25,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:37:25,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:37:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:37:25,473 INFO L87 Difference]: Start difference. First operand 233 states and 286 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:26,077 INFO L93 Difference]: Finished difference Result 726 states and 889 transitions. [2021-11-02 13:37:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 13:37:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 13:37:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:26,079 INFO L225 Difference]: With dead ends: 726 [2021-11-02 13:37:26,079 INFO L226 Difference]: Without dead ends: 530 [2021-11-02 13:37:26,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.58ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-02 13:37:26,080 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1811 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 429.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.35ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 532.54ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:26,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1811 Valid, 0 Invalid, 907 Unknown, 0 Unchecked, 4.35ms Time], IncrementalHoareTripleChecker [75 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 532.54ms Time] [2021-11-02 13:37:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-02 13:37:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 237. [2021-11-02 13:37:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 227 states have (on average 1.277533039647577) internal successors, (290), 236 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 290 transitions. [2021-11-02 13:37:26,087 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 290 transitions. Word has length 66 [2021-11-02 13:37:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 290 transitions. [2021-11-02 13:37:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 290 transitions. [2021-11-02 13:37:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 13:37:26,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:26,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:26,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 13:37:26,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1529718097, now seen corresponding path program 1 times [2021-11-02 13:37:26,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:26,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698977872] [2021-11-02 13:37:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:26,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:26,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:26,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698977872] [2021-11-02 13:37:26,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698977872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:26,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:26,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 13:37:26,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772250591] [2021-11-02 13:37:26,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 13:37:26,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 13:37:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 13:37:26,161 INFO L87 Difference]: Start difference. First operand 237 states and 290 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:26,840 INFO L93 Difference]: Finished difference Result 733 states and 897 transitions. [2021-11-02 13:37:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 13:37:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 13:37:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:26,843 INFO L225 Difference]: With dead ends: 733 [2021-11-02 13:37:26,843 INFO L226 Difference]: Without dead ends: 526 [2021-11-02 13:37:26,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.92ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-02 13:37:26,844 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1955 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 469.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1955 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 584.32ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:26,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1955 Valid, 0 Invalid, 1197 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [96 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 584.32ms Time] [2021-11-02 13:37:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-02 13:37:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 241. [2021-11-02 13:37:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 231 states have (on average 1.2727272727272727) internal successors, (294), 240 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 294 transitions. [2021-11-02 13:37:26,852 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 294 transitions. Word has length 76 [2021-11-02 13:37:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:26,852 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 294 transitions. [2021-11-02 13:37:26,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 294 transitions. [2021-11-02 13:37:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 13:37:26,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:26,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:26,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 13:37:26,853 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1176629715, now seen corresponding path program 1 times [2021-11-02 13:37:26,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:26,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470347945] [2021-11-02 13:37:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:26,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:37:26,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:26,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470347945] [2021-11-02 13:37:26,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470347945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:26,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:26,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:37:26,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464318630] [2021-11-02 13:37:26,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:37:26,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:37:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:37:26,913 INFO L87 Difference]: Start difference. First operand 241 states and 294 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:27,546 INFO L93 Difference]: Finished difference Result 648 states and 782 transitions. [2021-11-02 13:37:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:37:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 13:37:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:27,547 INFO L225 Difference]: With dead ends: 648 [2021-11-02 13:37:27,547 INFO L226 Difference]: Without dead ends: 444 [2021-11-02 13:37:27,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.51ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:37:27,548 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 229 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 469.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.34ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 584.02ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:27,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 0 Invalid, 1339 Unknown, 0 Unchecked, 3.34ms Time], IncrementalHoareTripleChecker [14 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 584.02ms Time] [2021-11-02 13:37:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-02 13:37:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 241. [2021-11-02 13:37:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 231 states have (on average 1.2640692640692641) internal successors, (292), 240 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 292 transitions. [2021-11-02 13:37:27,555 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 292 transitions. Word has length 76 [2021-11-02 13:37:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:27,555 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 292 transitions. [2021-11-02 13:37:27,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 292 transitions. [2021-11-02 13:37:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 13:37:27,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:27,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:27,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 13:37:27,556 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash 660004237, now seen corresponding path program 1 times [2021-11-02 13:37:27,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:27,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961669828] [2021-11-02 13:37:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:27,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:37:27,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:27,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961669828] [2021-11-02 13:37:27,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961669828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:37:27,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565785907] [2021-11-02 13:37:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:27,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:37:27,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:37:27,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:37:27,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 13:37:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:27,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-02 13:37:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:37:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:37:27,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-02 13:37:28,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-02 13:37:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:37:28,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:37:29,057 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 82 treesize of output 78 [2021-11-02 13:37:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:37:29,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565785907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:37:29,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:37:29,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2021-11-02 13:37:29,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419695413] [2021-11-02 13:37:29,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 13:37:29,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 13:37:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-02 13:37:29,262 INFO L87 Difference]: Start difference. First operand 241 states and 292 transitions. Second operand has 26 states, 26 states have (on average 7.615384615384615) internal successors, (198), 26 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:34,480 INFO L93 Difference]: Finished difference Result 2109 states and 2484 transitions. [2021-11-02 13:37:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-02 13:37:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.615384615384615) internal successors, (198), 26 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 13:37:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:34,503 INFO L225 Difference]: With dead ends: 2109 [2021-11-02 13:37:34,507 INFO L226 Difference]: Without dead ends: 1907 [2021-11-02 13:37:34,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 2493.40ms TimeCoverageRelationStatistics Valid=2545, Invalid=9445, Unknown=0, NotChecked=0, Total=11990 [2021-11-02 13:37:34,517 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 8166 mSDsluCounter, 3513 mSDsCounter, 0 mSdLazyCounter, 5595 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2346.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8166 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.69ms SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 5595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2812.13ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:34,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8166 Valid, 0 Invalid, 6113 Unknown, 0 Unchecked, 20.69ms Time], IncrementalHoareTripleChecker [518 Valid, 5595 Invalid, 0 Unknown, 0 Unchecked, 2812.13ms Time] [2021-11-02 13:37:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-02 13:37:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 365. [2021-11-02 13:37:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 355 states have (on average 1.2450704225352112) internal successors, (442), 364 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 442 transitions. [2021-11-02 13:37:34,557 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 442 transitions. Word has length 80 [2021-11-02 13:37:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:34,560 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 442 transitions. [2021-11-02 13:37:34,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.615384615384615) internal successors, (198), 26 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 442 transitions. [2021-11-02 13:37:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:37:34,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:34,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:34,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-02 13:37:34,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 13:37:34,776 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2023690006, now seen corresponding path program 1 times [2021-11-02 13:37:34,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:34,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217224044] [2021-11-02 13:37:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:34,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:37:35,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:35,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217224044] [2021-11-02 13:37:35,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217224044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:37:35,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321844917] [2021-11-02 13:37:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:35,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:37:35,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:37:35,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:37:35,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 13:37:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:35,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 13:37:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:37:35,316 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:37:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-02 13:37:35,325 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:37:35,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-02 13:37:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:37:37,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:37:37,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321844917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:37,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:37:37,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2021-11-02 13:37:37,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333141399] [2021-11-02 13:37:37,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 13:37:37,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:37,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 13:37:37,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-02 13:37:37,592 INFO L87 Difference]: Start difference. First operand 365 states and 442 transitions. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:37,873 INFO L93 Difference]: Finished difference Result 640 states and 780 transitions. [2021-11-02 13:37:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 13:37:37,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 13:37:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:37,875 INFO L225 Difference]: With dead ends: 640 [2021-11-02 13:37:37,875 INFO L226 Difference]: Without dead ends: 487 [2021-11-02 13:37:37,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 344.78ms TimeCoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-11-02 13:37:37,877 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1200 IncrementalHoareTripleChecker+Unchecked, 238.96ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:37,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 1747 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [0 Valid, 547 Invalid, 0 Unknown, 1200 Unchecked, 238.96ms Time] [2021-11-02 13:37:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-02 13:37:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 487. [2021-11-02 13:37:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 477 states have (on average 1.2368972746331237) internal successors, (590), 486 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 590 transitions. [2021-11-02 13:37:37,895 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 590 transitions. Word has length 82 [2021-11-02 13:37:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:37,895 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 590 transitions. [2021-11-02 13:37:37,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 590 transitions. [2021-11-02 13:37:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:37:37,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:37,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:37,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 13:37:38,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 13:37:38,114 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2021842964, now seen corresponding path program 1 times [2021-11-02 13:37:38,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:38,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148708162] [2021-11-02 13:37:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:38,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:37:38,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:38,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148708162] [2021-11-02 13:37:38,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148708162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:38,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:37:38,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-02 13:37:38,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954589603] [2021-11-02 13:37:38,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 13:37:38,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:38,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 13:37:38,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-02 13:37:38,338 INFO L87 Difference]: Start difference. First operand 487 states and 590 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:39,942 INFO L93 Difference]: Finished difference Result 856 states and 1045 transitions. [2021-11-02 13:37:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 13:37:39,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 13:37:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:39,944 INFO L225 Difference]: With dead ends: 856 [2021-11-02 13:37:39,944 INFO L226 Difference]: Without dead ends: 702 [2021-11-02 13:37:39,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 366.66ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-11-02 13:37:39,945 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1480 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 2957 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1023.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.45ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1242.99ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:39,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 0 Invalid, 3005 Unknown, 0 Unchecked, 7.45ms Time], IncrementalHoareTripleChecker [48 Valid, 2957 Invalid, 0 Unknown, 0 Unchecked, 1242.99ms Time] [2021-11-02 13:37:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-02 13:37:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 487. [2021-11-02 13:37:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 477 states have (on average 1.2327044025157232) internal successors, (588), 486 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 588 transitions. [2021-11-02 13:37:39,965 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 588 transitions. Word has length 82 [2021-11-02 13:37:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 588 transitions. [2021-11-02 13:37:39,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 588 transitions. [2021-11-02 13:37:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:37:39,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:39,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:39,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 13:37:39,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -246835602, now seen corresponding path program 1 times [2021-11-02 13:37:39,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:39,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624157957] [2021-11-02 13:37:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:39,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:37:40,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:40,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624157957] [2021-11-02 13:37:40,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624157957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:37:40,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289429291] [2021-11-02 13:37:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:40,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:37:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:37:40,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:37:40,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 13:37:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 13:37:40,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:37:40,470 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:37:40,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-02 13:37:40,487 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:37:40,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-02 13:37:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:37:42,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:37:42,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289429291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:37:42,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:37:42,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13] total 25 [2021-11-02 13:37:42,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702147127] [2021-11-02 13:37:42,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 13:37:42,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:37:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 13:37:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-11-02 13:37:42,658 INFO L87 Difference]: Start difference. First operand 487 states and 588 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:37:42,983 INFO L93 Difference]: Finished difference Result 742 states and 895 transitions. [2021-11-02 13:37:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 13:37:42,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 13:37:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:37:42,986 INFO L225 Difference]: With dead ends: 742 [2021-11-02 13:37:42,986 INFO L226 Difference]: Without dead ends: 586 [2021-11-02 13:37:42,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 483.08ms TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-11-02 13:37:42,987 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 214.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 268.39ms IncrementalHoareTripleChecker+Time [2021-11-02 13:37:42,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 1608 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [1 Valid, 763 Invalid, 0 Unknown, 844 Unchecked, 268.39ms Time] [2021-11-02 13:37:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-02 13:37:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 579. [2021-11-02 13:37:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 569 states have (on average 1.2196836555360282) internal successors, (694), 578 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 694 transitions. [2021-11-02 13:37:43,010 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 694 transitions. Word has length 82 [2021-11-02 13:37:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:37:43,010 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 694 transitions. [2021-11-02 13:37:43,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:37:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 694 transitions. [2021-11-02 13:37:43,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:37:43,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:37:43,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:37:43,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 13:37:43,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:37:43,228 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:37:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:37:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 433222768, now seen corresponding path program 1 times [2021-11-02 13:37:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:37:43,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985462866] [2021-11-02 13:37:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:43,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:37:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:37:43,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:37:43,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985462866] [2021-11-02 13:37:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985462866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:37:43,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615228143] [2021-11-02 13:37:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:37:43,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:37:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:37:43,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:37:43,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 13:37:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:37:43,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 13:37:43,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:37:43,592 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:37:43,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-02 13:37:57,655 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 13:38:15,742 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-02 13:38:27,849 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:38:39,993 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-02 13:38:48,631 WARN L210 SmtUtils]: Spent 8.59s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-02 13:38:58,805 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-02 13:39:07,207 WARN L210 SmtUtils]: Spent 8.34s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-02 13:39:17,150 WARN L210 SmtUtils]: Spent 9.85s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:39:27,509 WARN L210 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:39:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:39:27,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:39:27,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 169 [2021-11-02 13:39:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:39:27,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615228143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:39:27,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:39:27,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2021-11-02 13:39:27,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820991809] [2021-11-02 13:39:27,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 13:39:27,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:39:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 13:39:27,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=805, Unknown=8, NotChecked=0, Total=930 [2021-11-02 13:39:27,978 INFO L87 Difference]: Start difference. First operand 579 states and 694 transitions. Second operand has 31 states, 31 states have (on average 6.032258064516129) internal successors, (187), 31 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:39:37,132 WARN L210 SmtUtils]: Spent 9.07s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-02 13:39:57,184 WARN L210 SmtUtils]: Spent 20.03s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-11-02 13:39:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:39:58,542 INFO L93 Difference]: Finished difference Result 952 states and 1139 transitions. [2021-11-02 13:39:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 13:39:58,542 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.032258064516129) internal successors, (187), 31 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 13:39:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:39:58,544 INFO L225 Difference]: With dead ends: 952 [2021-11-02 13:39:58,544 INFO L226 Difference]: Without dead ends: 794 [2021-11-02 13:39:58,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 132510.50ms TimeCoverageRelationStatistics Valid=141, Invalid=973, Unknown=8, NotChecked=0, Total=1122 [2021-11-02 13:39:58,546 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 264 mSDsluCounter, 2708 mSDsCounter, 0 mSdLazyCounter, 3815 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1116.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.62ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1354.60ms IncrementalHoareTripleChecker+Time [2021-11-02 13:39:58,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 0 Invalid, 3900 Unknown, 0 Unchecked, 10.62ms Time], IncrementalHoareTripleChecker [8 Valid, 3815 Invalid, 0 Unknown, 77 Unchecked, 1354.60ms Time] [2021-11-02 13:39:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-02 13:39:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 669. [2021-11-02 13:39:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 659 states have (on average 1.2109256449165402) internal successors, (798), 668 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:39:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 798 transitions. [2021-11-02 13:39:58,595 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 798 transitions. Word has length 82 [2021-11-02 13:39:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:39:58,595 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 798 transitions. [2021-11-02 13:39:58,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.032258064516129) internal successors, (187), 31 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:39:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 798 transitions. [2021-11-02 13:39:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:39:58,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:39:58,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:39:58,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 13:39:58,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 13:39:58,813 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:39:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:39:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1134287346, now seen corresponding path program 1 times [2021-11-02 13:39:58,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:39:58,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56960849] [2021-11-02 13:39:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:39:58,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:39:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:39:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 13:39:58,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:39:58,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56960849] [2021-11-02 13:39:58,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56960849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:39:58,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:39:58,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 13:39:58,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626956401] [2021-11-02 13:39:58,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 13:39:58,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:39:58,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 13:39:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:39:58,914 INFO L87 Difference]: Start difference. First operand 669 states and 798 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:39:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:39:59,556 INFO L93 Difference]: Finished difference Result 940 states and 1125 transitions. [2021-11-02 13:39:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 13:39:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 13:39:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:39:59,559 INFO L225 Difference]: With dead ends: 940 [2021-11-02 13:39:59,559 INFO L226 Difference]: Without dead ends: 780 [2021-11-02 13:39:59,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 114.71ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-11-02 13:39:59,560 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1645 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 423.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.37ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 504.20ms IncrementalHoareTripleChecker+Time [2021-11-02 13:39:59,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 0 Invalid, 1021 Unknown, 0 Unchecked, 4.37ms Time], IncrementalHoareTripleChecker [57 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 504.20ms Time] [2021-11-02 13:39:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-02 13:39:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 667. [2021-11-02 13:39:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 657 states have (on average 1.1993911719939117) internal successors, (788), 666 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:39:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 788 transitions. [2021-11-02 13:39:59,591 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 788 transitions. Word has length 82 [2021-11-02 13:39:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:39:59,592 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 788 transitions. [2021-11-02 13:39:59,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:39:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 788 transitions. [2021-11-02 13:39:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:39:59,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:39:59,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:39:59,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 13:39:59,594 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:39:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:39:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash -100461972, now seen corresponding path program 1 times [2021-11-02 13:39:59,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:39:59,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877212235] [2021-11-02 13:39:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:39:59,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:39:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:39:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:39:59,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:39:59,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877212235] [2021-11-02 13:39:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877212235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:39:59,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488275360] [2021-11-02 13:39:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:39:59,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:39:59,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:39:59,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:39:59,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 13:39:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:39:59,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-02 13:39:59,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:39:59,932 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:39:59,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-02 13:40:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-02 13:40:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:40:00,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:40:00,923 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 165 treesize of output 157 [2021-11-02 13:40:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:40:00,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488275360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:40:00,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:40:00,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 39 [2021-11-02 13:40:00,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967870541] [2021-11-02 13:40:00,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 13:40:00,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:40:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 13:40:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 13:40:00,996 INFO L87 Difference]: Start difference. First operand 667 states and 788 transitions. Second operand has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:05,115 INFO L93 Difference]: Finished difference Result 1523 states and 1828 transitions. [2021-11-02 13:40:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 13:40:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 13:40:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:05,119 INFO L225 Difference]: With dead ends: 1523 [2021-11-02 13:40:05,119 INFO L226 Difference]: Without dead ends: 1282 [2021-11-02 13:40:05,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 945.36ms TimeCoverageRelationStatistics Valid=493, Invalid=3289, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 13:40:05,120 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1974 mSDsluCounter, 7884 mSDsCounter, 0 mSdLazyCounter, 10271 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2845.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.41ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 10271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1137 IncrementalHoareTripleChecker+Unchecked, 3501.77ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:05,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 0 Invalid, 11549 Unknown, 0 Unchecked, 23.41ms Time], IncrementalHoareTripleChecker [141 Valid, 10271 Invalid, 0 Unknown, 1137 Unchecked, 3501.77ms Time] [2021-11-02 13:40:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-11-02 13:40:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 733. [2021-11-02 13:40:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 723 states have (on average 1.1991701244813278) internal successors, (867), 732 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 867 transitions. [2021-11-02 13:40:05,170 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 867 transitions. Word has length 82 [2021-11-02 13:40:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:05,171 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 867 transitions. [2021-11-02 13:40:05,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 867 transitions. [2021-11-02 13:40:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 13:40:05,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:05,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:40:05,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 13:40:05,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 13:40:05,390 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:40:05,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:05,390 INFO L85 PathProgramCache]: Analyzing trace with hash 242691180, now seen corresponding path program 1 times [2021-11-02 13:40:05,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:05,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422945106] [2021-11-02 13:40:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:05,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:05,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:05,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422945106] [2021-11-02 13:40:05,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422945106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:40:05,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:40:05,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 13:40:05,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723225999] [2021-11-02 13:40:05,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 13:40:05,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:40:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 13:40:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:40:05,495 INFO L87 Difference]: Start difference. First operand 733 states and 867 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:06,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:06,722 INFO L93 Difference]: Finished difference Result 1508 states and 1775 transitions. [2021-11-02 13:40:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 13:40:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 13:40:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:06,725 INFO L225 Difference]: With dead ends: 1508 [2021-11-02 13:40:06,725 INFO L226 Difference]: Without dead ends: 1205 [2021-11-02 13:40:06,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 240.09ms TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-11-02 13:40:06,728 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1157 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 782.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 946.05ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:06,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 0 Invalid, 2448 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [129 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 946.05ms Time] [2021-11-02 13:40:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-11-02 13:40:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 725. [2021-11-02 13:40:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 715 states have (on average 1.1874125874125874) internal successors, (849), 724 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 849 transitions. [2021-11-02 13:40:06,765 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 849 transitions. Word has length 82 [2021-11-02 13:40:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:06,765 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 849 transitions. [2021-11-02 13:40:06,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 849 transitions. [2021-11-02 13:40:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 13:40:06,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:06,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:40:06,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 13:40:06,768 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:40:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash 407517578, now seen corresponding path program 1 times [2021-11-02 13:40:06,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:06,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846738369] [2021-11-02 13:40:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:06,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:06,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:06,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846738369] [2021-11-02 13:40:06,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846738369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:40:06,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554664592] [2021-11-02 13:40:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:06,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:06,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:40:06,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:40:06,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 13:40:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 13:40:07,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:40:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 13:40:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:40:07,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-02 13:40:07,168 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 13:40:07,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 13:40:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:40:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:40:07,242 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-02 13:40:07,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 47 [2021-11-02 13:40:08,091 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-11-02 13:40:08,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 35 [2021-11-02 13:40:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:08,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:40:13,885 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 1661 treesize of output 1645 [2021-11-02 13:40:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:14,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554664592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:40:14,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:40:14,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2021-11-02 13:40:14,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604774503] [2021-11-02 13:40:14,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 13:40:14,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:40:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 13:40:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=682, Unknown=3, NotChecked=0, Total=756 [2021-11-02 13:40:14,470 INFO L87 Difference]: Start difference. First operand 725 states and 849 transitions. Second operand has 28 states, 28 states have (on average 5.571428571428571) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:17,006 INFO L93 Difference]: Finished difference Result 1369 states and 1624 transitions. [2021-11-02 13:40:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 13:40:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.571428571428571) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 13:40:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:17,018 INFO L225 Difference]: With dead ends: 1369 [2021-11-02 13:40:17,018 INFO L226 Difference]: Without dead ends: 1116 [2021-11-02 13:40:17,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 6320.47ms TimeCoverageRelationStatistics Valid=189, Invalid=1700, Unknown=3, NotChecked=0, Total=1892 [2021-11-02 13:40:17,020 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 964 mSDsluCounter, 5493 mSDsCounter, 0 mSdLazyCounter, 6101 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1694.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.79ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 6101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1474 IncrementalHoareTripleChecker+Unchecked, 2012.15ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:17,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 0 Invalid, 7611 Unknown, 0 Unchecked, 10.79ms Time], IncrementalHoareTripleChecker [36 Valid, 6101 Invalid, 0 Unknown, 1474 Unchecked, 2012.15ms Time] [2021-11-02 13:40:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-11-02 13:40:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 650. [2021-11-02 13:40:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 640 states have (on average 1.1875) internal successors, (760), 649 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 760 transitions. [2021-11-02 13:40:17,054 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 760 transitions. Word has length 84 [2021-11-02 13:40:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:17,054 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 760 transitions. [2021-11-02 13:40:17,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.571428571428571) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 760 transitions. [2021-11-02 13:40:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 13:40:17,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:17,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:40:17,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 13:40:17,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:17,274 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:40:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash 712721433, now seen corresponding path program 1 times [2021-11-02 13:40:17,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:17,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599644391] [2021-11-02 13:40:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:17,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 13:40:17,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:17,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599644391] [2021-11-02 13:40:17,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599644391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:40:17,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:40:17,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:40:17,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830350174] [2021-11-02 13:40:17,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:40:17,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:40:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:40:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:40:17,340 INFO L87 Difference]: Start difference. First operand 650 states and 760 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:17,956 INFO L93 Difference]: Finished difference Result 1285 states and 1511 transitions. [2021-11-02 13:40:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 13:40:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 13:40:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:17,959 INFO L225 Difference]: With dead ends: 1285 [2021-11-02 13:40:17,959 INFO L226 Difference]: Without dead ends: 878 [2021-11-02 13:40:17,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.73ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:40:17,971 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 535 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 418.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 542.81ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:17,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 0 Invalid, 1681 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [22 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 542.81ms Time] [2021-11-02 13:40:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-11-02 13:40:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 538. [2021-11-02 13:40:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 528 states have (on average 1.1856060606060606) internal successors, (626), 537 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 626 transitions. [2021-11-02 13:40:18,000 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 626 transitions. Word has length 89 [2021-11-02 13:40:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:18,000 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 626 transitions. [2021-11-02 13:40:18,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 626 transitions. [2021-11-02 13:40:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 13:40:18,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:18,002 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:40:18,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 13:40:18,002 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:40:18,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1170907302, now seen corresponding path program 1 times [2021-11-02 13:40:18,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:18,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010925276] [2021-11-02 13:40:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:18,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:18,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:18,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010925276] [2021-11-02 13:40:18,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010925276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:40:18,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349089388] [2021-11-02 13:40:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:18,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:18,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:40:18,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:40:18,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 13:40:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 13:40:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:40:18,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 13:40:18,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:40:18,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 13:40:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:18,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:40:18,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:40:18,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2021-11-02 13:40:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-02 13:40:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:18,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349089388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:40:18,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:40:18,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-02 13:40:18,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523258868] [2021-11-02 13:40:18,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 13:40:18,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:40:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 13:40:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 13:40:18,913 INFO L87 Difference]: Start difference. First operand 538 states and 626 transitions. Second operand has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:22,786 INFO L93 Difference]: Finished difference Result 1191 states and 1410 transitions. [2021-11-02 13:40:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 13:40:22,788 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-02 13:40:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:22,791 INFO L225 Difference]: With dead ends: 1191 [2021-11-02 13:40:22,791 INFO L226 Difference]: Without dead ends: 898 [2021-11-02 13:40:22,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1275.95ms TimeCoverageRelationStatistics Valid=685, Invalid=2975, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 13:40:22,793 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 959 mSDsluCounter, 8474 mSDsCounter, 0 mSdLazyCounter, 10237 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2374.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.43ms SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 10237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 624 IncrementalHoareTripleChecker+Unchecked, 2828.20ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:22,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 0 Invalid, 11016 Unknown, 0 Unchecked, 13.43ms Time], IncrementalHoareTripleChecker [155 Valid, 10237 Invalid, 0 Unknown, 624 Unchecked, 2828.20ms Time] [2021-11-02 13:40:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-02 13:40:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 591. [2021-11-02 13:40:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 581 states have (on average 1.1876075731497417) internal successors, (690), 590 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 690 transitions. [2021-11-02 13:40:22,824 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 690 transitions. Word has length 90 [2021-11-02 13:40:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:22,824 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 690 transitions. [2021-11-02 13:40:22,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 690 transitions. [2021-11-02 13:40:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 13:40:22,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:22,825 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:40:22,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 13:40:23,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:23,063 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:40:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1707931942, now seen corresponding path program 1 times [2021-11-02 13:40:23,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:23,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737528820] [2021-11-02 13:40:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:23,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 13:40:23,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:23,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737528820] [2021-11-02 13:40:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737528820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:40:23,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:40:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:40:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201868734] [2021-11-02 13:40:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:40:23,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:40:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:40:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:40:23,113 INFO L87 Difference]: Start difference. First operand 591 states and 690 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:23,549 INFO L93 Difference]: Finished difference Result 1037 states and 1220 transitions. [2021-11-02 13:40:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:40:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-02 13:40:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:23,551 INFO L225 Difference]: With dead ends: 1037 [2021-11-02 13:40:23,551 INFO L226 Difference]: Without dead ends: 680 [2021-11-02 13:40:23,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.44ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:40:23,552 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 203 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 394.19ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:23,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 0 Invalid, 696 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [22 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 394.19ms Time] [2021-11-02 13:40:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-02 13:40:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 521. [2021-11-02 13:40:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 511 states have (on average 1.152641878669276) internal successors, (589), 520 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 589 transitions. [2021-11-02 13:40:23,580 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 589 transitions. Word has length 90 [2021-11-02 13:40:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:23,580 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 589 transitions. [2021-11-02 13:40:23,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 589 transitions. [2021-11-02 13:40:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 13:40:23,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:23,582 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:40:23,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 13:40:23,582 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:40:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1488476706, now seen corresponding path program 2 times [2021-11-02 13:40:23,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:23,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350067969] [2021-11-02 13:40:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:23,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 13:40:23,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:23,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350067969] [2021-11-02 13:40:23,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350067969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:40:23,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188458837] [2021-11-02 13:40:23,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 13:40:23,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:23,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:40:23,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:40:23,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 13:40:23,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 13:40:23,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 13:40:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 13:40:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:40:23,887 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:40:23,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-02 13:40:23,903 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-02 13:40:23,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-02 13:40:27,381 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 13:40:27,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 92 [2021-11-02 13:40:27,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:40:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 95 [2021-11-02 13:40:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 13:40:27,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:40:27,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188458837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:40:27,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:40:27,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 21 [2021-11-02 13:40:27,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982674139] [2021-11-02 13:40:27,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 13:40:27,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:40:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 13:40:27,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-02 13:40:27,493 INFO L87 Difference]: Start difference. First operand 521 states and 589 transitions. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:40:27,790 INFO L93 Difference]: Finished difference Result 680 states and 779 transitions. [2021-11-02 13:40:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 13:40:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-02 13:40:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:40:27,792 INFO L225 Difference]: With dead ends: 680 [2021-11-02 13:40:27,792 INFO L226 Difference]: Without dead ends: 522 [2021-11-02 13:40:27,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1663.21ms TimeCoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-11-02 13:40:27,793 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1394 IncrementalHoareTripleChecker+Unchecked, 230.10ms IncrementalHoareTripleChecker+Time [2021-11-02 13:40:27,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 2147 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [1 Valid, 752 Invalid, 0 Unknown, 1394 Unchecked, 230.10ms Time] [2021-11-02 13:40:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-02 13:40:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 476. [2021-11-02 13:40:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 466 states have (on average 1.1566523605150214) internal successors, (539), 475 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 539 transitions. [2021-11-02 13:40:27,826 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 539 transitions. Word has length 90 [2021-11-02 13:40:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:40:27,827 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 539 transitions. [2021-11-02 13:40:27,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:40:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 539 transitions. [2021-11-02 13:40:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 13:40:27,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:40:27,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:40:27,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-02 13:40:28,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 13:40:28,047 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-02 13:40:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:40:28,047 INFO L85 PathProgramCache]: Analyzing trace with hash -11551711, now seen corresponding path program 1 times [2021-11-02 13:40:28,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:40:28,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824660822] [2021-11-02 13:40:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:28,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:40:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:28,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:40:28,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824660822] [2021-11-02 13:40:28,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824660822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:40:28,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311225908] [2021-11-02 13:40:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:40:28,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:40:28,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:40:28,320 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:40:28,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 13:40:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:40:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-02 13:40:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:40:28,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:40:28,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:40:28,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-02 13:40:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:40:28,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-02 13:40:29,909 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-02 13:40:29,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 68 [2021-11-02 13:40:29,916 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-02 13:40:29,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-11-02 13:40:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:40:29,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:40:31,211 INFO L354 Elim1Store]: treesize reduction 141, result has 15.1 percent of original size [2021-11-02 13:40:31,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1415 treesize of output 1247 [2021-11-02 13:40:31,406 INFO L354 Elim1Store]: treesize reduction 385, result has 24.2 percent of original size [2021-11-02 13:40:31,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 4854 treesize of output 4638 [2021-11-02 13:40:31,600 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-11-02 13:40:31,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3836 treesize of output 3740 Killed by 15