./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_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_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 f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 13:34:35,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 13:34:35,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 13:34:36,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 13:34:36,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 13:34:36,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 13:34:36,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 13:34:36,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 13:34:36,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 13:34:36,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 13:34:36,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 13:34:36,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 13:34:36,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 13:34:36,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 13:34:36,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 13:34:36,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 13:34:36,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 13:34:36,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 13:34:36,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 13:34:36,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 13:34:36,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 13:34:36,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 13:34:36,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 13:34:36,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 13:34:36,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 13:34:36,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 13:34:36,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 13:34:36,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 13:34:36,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 13:34:36,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 13:34:36,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 13:34:36,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 13:34:36,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 13:34:36,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 13:34:36,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 13:34:36,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 13:34:36,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 13:34:36,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 13:34:36,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 13:34:36,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 13:34:36,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 13:34:36,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 13:34:36,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 13:34:36,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 13:34:36,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 13:34:36,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 13:34:36,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 13:34:36,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 13:34:36,139 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 13:34:36,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 13:34:36,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 13:34:36,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 13:34:36,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 13:34:36,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 13:34:36,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 13:34:36,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 13:34:36,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 13:34:36,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 13:34:36,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 13:34:36,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 13:34:36,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 13:34:36,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:34:36,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 13:34:36,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 13:34:36,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 13:34:36,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 13:34:36,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 13:34:36,149 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 13:34:36,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 13:34:36,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 13:34:36,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 13:34:36,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f57bc64edf303a057c8eafb48480d4e5b764bd411481261d53eb2a101eb82ae8 [2021-11-02 13:34:36,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 13:34:36,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 13:34:36,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 13:34:36,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 13:34:36,418 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 13:34:36,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-02 13:34:36,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbaef838d/8542028c06ee4bdaa7a0867b7a46f5bf/FLAG68e4b1b49 [2021-11-02 13:34:37,124 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 13:34:37,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_back_harness.i [2021-11-02 13:34:37,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbaef838d/8542028c06ee4bdaa7a0867b7a46f5bf/FLAG68e4b1b49 [2021-11-02 13:34:37,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbaef838d/8542028c06ee4bdaa7a0867b7a46f5bf [2021-11-02 13:34:37,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 13:34:37,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 13:34:37,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 13:34:37,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 13:34:37,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 13:34:37,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:34:37" (1/1) ... [2021-11-02 13:34:37,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388b456c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:37, skipping insertion in model container [2021-11-02 13:34:37,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:34:37" (1/1) ... [2021-11-02 13:34:37,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 13:34:37,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 13:34:37,789 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_back_harness.i[4494,4507] [2021-11-02 13:34:37,794 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_back_harness.i[4554,4567] [2021-11-02 13:34:37,808 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:34:37,813 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:34:38,269 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,271 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,271 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,272 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,273 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,280 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,281 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,284 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,285 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,287 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,288 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,288 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,289 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,490 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:34:38,491 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:34:38,491 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:34:38,492 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:34:38,493 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:34:38,493 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:34:38,494 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:34:38,494 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:34:38,494 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:34:38,495 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:34:38,613 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:34:38,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:34:38,653 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 13:34:38,677 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_back_harness.i[4494,4507] [2021-11-02 13:34:38,677 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_back_harness.i[4554,4567] [2021-11-02 13:34:38,679 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:34:38,680 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:34:38,726 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,726 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,727 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,727 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,728 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,737 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,737 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,738 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,738 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,739 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,739 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,740 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,740 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:34:38,775 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:34:38,779 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:34:38,779 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:34:38,780 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:34:38,780 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:34:38,781 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:34:38,781 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:34:38,781 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:34:38,781 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:34:38,782 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:34:38,800 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:34:38,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:34:38,963 INFO L208 MainTranslator]: Completed translation [2021-11-02 13:34:38,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38 WrapperNode [2021-11-02 13:34:38,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 13:34:38,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 13:34:38,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 13:34:38,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 13:34:38,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 13:34:39,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 13:34:39,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 13:34:39,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 13:34:39,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 13:34:39,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 13:34:39,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 13:34:39,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 13:34:39,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (1/1) ... [2021-11-02 13:34:39,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:34:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:34:39,178 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 13:34:39,203 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 13:34:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 13:34:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 13:34:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 13:34:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 13:34:39,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 13:34:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 13:34:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 13:34:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 13:34:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 13:34:39,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 13:34:39,548 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-02 13:34:39,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:34:39 BoogieIcfgContainer [2021-11-02 13:34:39,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 13:34:39,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 13:34:39,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 13:34:39,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 13:34:39,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 01:34:37" (1/3) ... [2021-11-02 13:34:39,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af343a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:34:39, skipping insertion in model container [2021-11-02 13:34:39,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:34:38" (2/3) ... [2021-11-02 13:34:39,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af343a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:34:39, skipping insertion in model container [2021-11-02 13:34:39,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:34:39" (3/3) ... [2021-11-02 13:34:39,556 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness.i [2021-11-02 13:34:39,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 13:34:39,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-02 13:34:39,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 13:34:39,613 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 13:34:39,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-02 13:34:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 0 states have call successors, (0), 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 13:34:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 13:34:39,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:39,631 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] [2021-11-02 13:34:39,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1861478915, now seen corresponding path program 1 times [2021-11-02 13:34:39,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:39,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900304758] [2021-11-02 13:34:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:39,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:39,894 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 13:34:39,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:39,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900304758] [2021-11-02 13:34:39,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900304758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:39,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:39,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 13:34:39,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216212651] [2021-11-02 13:34:39,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 13:34:39,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 13:34:39,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:34:39,930 INFO L87 Difference]: Start difference. First operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 13:34:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:40,174 INFO L93 Difference]: Finished difference Result 264 states and 379 transitions. [2021-11-02 13:34:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 13:34:40,176 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-02 13:34:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:40,182 INFO L225 Difference]: With dead ends: 264 [2021-11-02 13:34:40,183 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 13:34:40,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:34:40,188 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 200.77ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:40,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 175 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 200.77ms Time] [2021-11-02 13:34:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 13:34:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-02 13:34:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 128 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-11-02 13:34:40,216 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 40 [2021-11-02 13:34:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:40,217 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-11-02 13:34:40,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 13:34:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-11-02 13:34:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 13:34:40,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:40,218 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] [2021-11-02 13:34:40,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 13:34:40,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash -836812353, now seen corresponding path program 1 times [2021-11-02 13:34:40,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:40,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764656434] [2021-11-02 13:34:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:40,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:40,334 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 13:34:40,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:40,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764656434] [2021-11-02 13:34:40,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764656434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:40,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:40,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:40,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958150173] [2021-11-02 13:34:40,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:40,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:40,338 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 13:34:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:40,543 INFO L93 Difference]: Finished difference Result 243 states and 323 transitions. [2021-11-02 13:34:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:34:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-02 13:34:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:40,545 INFO L225 Difference]: With dead ends: 243 [2021-11-02 13:34:40,545 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 13:34:40,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.45ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:40,547 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.28ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:40,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [4 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 182.28ms Time] [2021-11-02 13:34:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 13:34:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-02 13:34:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3770491803278688) internal successors, (168), 128 states have internal predecessors, (168), 0 states have call successors, (0), 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 13:34:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2021-11-02 13:34:40,555 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 40 [2021-11-02 13:34:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:40,555 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2021-11-02 13:34:40,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 13:34:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2021-11-02 13:34:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 13:34:40,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:40,557 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] [2021-11-02 13:34:40,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 13:34:40,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1534926909, now seen corresponding path program 1 times [2021-11-02 13:34:40,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:40,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529029270] [2021-11-02 13:34:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:40,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:40,630 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 13:34:40,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:40,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529029270] [2021-11-02 13:34:40,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529029270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:40,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:40,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503409355] [2021-11-02 13:34:40,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:40,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:40,633 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 13:34:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:40,931 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2021-11-02 13:34:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:34:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-02 13:34:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:40,932 INFO L225 Difference]: With dead ends: 275 [2021-11-02 13:34:40,932 INFO L226 Difference]: Without dead ends: 179 [2021-11-02 13:34:40,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.51ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:40,933 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 277.50ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:40,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 503 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [2 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 277.50ms Time] [2021-11-02 13:34:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-02 13:34:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2021-11-02 13:34:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3688524590163935) internal successors, (167), 128 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2021-11-02 13:34:40,956 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 40 [2021-11-02 13:34:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:40,957 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2021-11-02 13:34:40,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 13:34:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2021-11-02 13:34:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 13:34:40,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:40,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:34:40,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 13:34:40,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:40,959 INFO L85 PathProgramCache]: Analyzing trace with hash 199131234, now seen corresponding path program 1 times [2021-11-02 13:34:40,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:40,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665495449] [2021-11-02 13:34:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:40,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:41,054 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 13:34:41,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:41,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665495449] [2021-11-02 13:34:41,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665495449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:41,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:41,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:34:41,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284286312] [2021-11-02 13:34:41,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:34:41,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:41,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:34:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:41,057 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 13:34:41,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:41,335 INFO L93 Difference]: Finished difference Result 284 states and 361 transitions. [2021-11-02 13:34:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:34:41,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-02 13:34:41,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:41,337 INFO L225 Difference]: With dead ends: 284 [2021-11-02 13:34:41,337 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 13:34:41,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.24ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 13:34:41,339 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 465 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.46ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.32ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:41,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 0 Invalid, 356 Unknown, 0 Unchecked, 3.46ms Time], IncrementalHoareTripleChecker [7 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 239.32ms Time] [2021-11-02 13:34:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 13:34:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-11-02 13:34:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 128 states have internal predecessors, (165), 0 states have call successors, (0), 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 13:34:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2021-11-02 13:34:41,347 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 42 [2021-11-02 13:34:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:41,347 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2021-11-02 13:34:41,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 13:34:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2021-11-02 13:34:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 13:34:41,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:41,348 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] [2021-11-02 13:34:41,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 13:34:41,349 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash 496706596, now seen corresponding path program 1 times [2021-11-02 13:34:41,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:41,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657849098] [2021-11-02 13:34:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:41,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:41,440 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 13:34:41,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:41,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657849098] [2021-11-02 13:34:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657849098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:41,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:41,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:34:41,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946033850] [2021-11-02 13:34:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:34:41,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:34:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:34:41,443 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 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 13:34:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:41,819 INFO L93 Difference]: Finished difference Result 379 states and 479 transitions. [2021-11-02 13:34:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:34:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-02 13:34:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:41,822 INFO L225 Difference]: With dead ends: 379 [2021-11-02 13:34:41,822 INFO L226 Difference]: Without dead ends: 281 [2021-11-02 13:34:41,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.66ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 13:34:41,837 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 773 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.73ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.01ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:41,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 0 Invalid, 594 Unknown, 0 Unchecked, 6.73ms Time], IncrementalHoareTripleChecker [16 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 316.01ms Time] [2021-11-02 13:34:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-02 13:34:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 131. [2021-11-02 13:34:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.346774193548387) internal successors, (167), 130 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-11-02 13:34:41,865 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 44 [2021-11-02 13:34:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:41,866 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-11-02 13:34:41,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 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 13:34:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-11-02 13:34:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 13:34:41,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:41,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:34:41,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 13:34:41,869 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:41,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1200660794, now seen corresponding path program 1 times [2021-11-02 13:34:41,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:41,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264608990] [2021-11-02 13:34:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:41,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:42,029 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 13:34:42,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:42,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264608990] [2021-11-02 13:34:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264608990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:42,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:42,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:34:42,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158013409] [2021-11-02 13:34:42,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:34:42,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:34:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:34:42,031 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:42,389 INFO L93 Difference]: Finished difference Result 381 states and 479 transitions. [2021-11-02 13:34:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:34:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 13:34:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:42,391 INFO L225 Difference]: With dead ends: 381 [2021-11-02 13:34:42,391 INFO L226 Difference]: Without dead ends: 282 [2021-11-02 13:34:42,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.09ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-02 13:34:42,392 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 874 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.68ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 305.18ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:42,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 0 Invalid, 489 Unknown, 0 Unchecked, 3.68ms Time], IncrementalHoareTripleChecker [21 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 305.18ms Time] [2021-11-02 13:34:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-02 13:34:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 133. [2021-11-02 13:34:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 132 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2021-11-02 13:34:42,399 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 45 [2021-11-02 13:34:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:42,399 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2021-11-02 13:34:42,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:34:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2021-11-02 13:34:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 13:34:42,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:42,400 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] [2021-11-02 13:34:42,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 13:34:42,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1737555954, now seen corresponding path program 1 times [2021-11-02 13:34:42,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:42,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978541391] [2021-11-02 13:34:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:42,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:42,458 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 13:34:42,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:42,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978541391] [2021-11-02 13:34:42,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978541391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:42,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:42,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:42,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691035648] [2021-11-02 13:34:42,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:42,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:42,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:42,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:42,472 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 13:34:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:42,702 INFO L93 Difference]: Finished difference Result 261 states and 334 transitions. [2021-11-02 13:34:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:34:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-02 13:34:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:42,703 INFO L225 Difference]: With dead ends: 261 [2021-11-02 13:34:42,703 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 13:34:42,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.93ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:42,704 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 213.43ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:42,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 531 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [17 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 213.43ms Time] [2021-11-02 13:34:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 13:34:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 143. [2021-11-02 13:34:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 136 states have (on average 1.3161764705882353) internal successors, (179), 142 states have internal predecessors, (179), 0 states have call successors, (0), 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 13:34:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2021-11-02 13:34:42,709 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 50 [2021-11-02 13:34:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:42,709 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2021-11-02 13:34:42,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 13:34:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2021-11-02 13:34:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 13:34:42,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:42,710 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] [2021-11-02 13:34:42,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 13:34:42,710 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:42,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1603542448, now seen corresponding path program 1 times [2021-11-02 13:34:42,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:42,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445039408] [2021-11-02 13:34:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:42,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:42,787 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 13:34:42,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:42,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445039408] [2021-11-02 13:34:42,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445039408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:42,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:42,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:34:42,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037583896] [2021-11-02 13:34:42,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:34:42,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:34:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:34:42,788 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 13:34:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:43,185 INFO L93 Difference]: Finished difference Result 417 states and 518 transitions. [2021-11-02 13:34:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 13:34:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-02 13:34:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:43,186 INFO L225 Difference]: With dead ends: 417 [2021-11-02 13:34:43,186 INFO L226 Difference]: Without dead ends: 299 [2021-11-02 13:34:43,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.83ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-02 13:34:43,187 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 850 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 338.38ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:43,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 0 Invalid, 708 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [29 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 338.38ms Time] [2021-11-02 13:34:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-02 13:34:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 145. [2021-11-02 13:34:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.3115942028985508) internal successors, (181), 144 states have internal predecessors, (181), 0 states have call successors, (0), 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 13:34:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 181 transitions. [2021-11-02 13:34:43,192 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 181 transitions. Word has length 50 [2021-11-02 13:34:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:43,192 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 181 transitions. [2021-11-02 13:34:43,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 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 13:34:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 181 transitions. [2021-11-02 13:34:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 13:34:43,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:43,193 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] [2021-11-02 13:34:43,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 13:34:43,194 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:43,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1675516340, now seen corresponding path program 1 times [2021-11-02 13:34:43,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:43,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554197494] [2021-11-02 13:34:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:43,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:43,272 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 13:34:43,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:43,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554197494] [2021-11-02 13:34:43,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554197494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:43,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:43,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:34:43,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669761792] [2021-11-02 13:34:43,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:34:43,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:34:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:43,273 INFO L87 Difference]: Start difference. First operand 145 states and 181 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 13:34:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:43,636 INFO L93 Difference]: Finished difference Result 371 states and 452 transitions. [2021-11-02 13:34:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:34:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-02 13:34:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:43,638 INFO L225 Difference]: With dead ends: 371 [2021-11-02 13:34:43,638 INFO L226 Difference]: Without dead ends: 263 [2021-11-02 13:34:43,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.00ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:34:43,639 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 264.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.00ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:43,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 812 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [7 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 335.00ms Time] [2021-11-02 13:34:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-02 13:34:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-11-02 13:34:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.3043478260869565) internal successors, (180), 144 states have internal predecessors, (180), 0 states have call successors, (0), 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 13:34:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2021-11-02 13:34:43,643 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 50 [2021-11-02 13:34:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:43,644 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2021-11-02 13:34:43,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 13:34:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2021-11-02 13:34:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 13:34:43,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:43,644 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] [2021-11-02 13:34:43,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 13:34:43,645 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1963585782, now seen corresponding path program 1 times [2021-11-02 13:34:43,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:43,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119576705] [2021-11-02 13:34:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:43,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:43,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:43,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119576705] [2021-11-02 13:34:43,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119576705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:34:43,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315001593] [2021-11-02 13:34:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:43,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:34:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:34:43,783 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 13:34:43,823 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 13:34:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 13:34:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:34:44,059 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:34:44,060 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 13:34:44,092 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-02 13:34:44,092 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 13:34:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:51,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:34:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:51,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315001593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:34:51,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:34:51,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 24 [2021-11-02 13:34:51,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581115625] [2021-11-02 13:34:51,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 13:34:51,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 13:34:51,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=483, Unknown=2, NotChecked=0, Total=552 [2021-11-02 13:34:51,857 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 13:34:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:56,553 INFO L93 Difference]: Finished difference Result 1007 states and 1220 transitions. [2021-11-02 13:34:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 13:34:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 52 [2021-11-02 13:34:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:56,557 INFO L225 Difference]: With dead ends: 1007 [2021-11-02 13:34:56,558 INFO L226 Difference]: Without dead ends: 898 [2021-11-02 13:34:56,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 9617.60ms TimeCoverageRelationStatistics Valid=627, Invalid=4061, Unknown=4, NotChecked=0, Total=4692 [2021-11-02 13:34:56,560 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1598 mSDsluCounter, 3834 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1094.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.66ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2065 IncrementalHoareTripleChecker+Unchecked, 1311.41ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:56,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 0 Invalid, 5785 Unknown, 0 Unchecked, 17.66ms Time], IncrementalHoareTripleChecker [69 Valid, 3651 Invalid, 0 Unknown, 2065 Unchecked, 1311.41ms Time] [2021-11-02 13:34:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-02 13:34:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 194. [2021-11-02 13:34:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 187 states have (on average 1.3101604278074865) internal successors, (245), 193 states have internal predecessors, (245), 0 states have call successors, (0), 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 13:34:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 245 transitions. [2021-11-02 13:34:56,584 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 245 transitions. Word has length 52 [2021-11-02 13:34:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:56,584 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 245 transitions. [2021-11-02 13:34:56,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 13:34:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 245 transitions. [2021-11-02 13:34:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 13:34:56,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:56,585 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] [2021-11-02 13:34:56,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 13:34:56,804 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,SelfDestructingSolverStorable9 [2021-11-02 13:34:56,805 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2025625396, now seen corresponding path program 1 times [2021-11-02 13:34:56,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:56,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054567852] [2021-11-02 13:34:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:56,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:56,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:56,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054567852] [2021-11-02 13:34:56,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054567852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:56,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:56,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 13:34:56,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884789504] [2021-11-02 13:34:56,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 13:34:56,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 13:34:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:34:56,958 INFO L87 Difference]: Start difference. First operand 194 states and 245 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:58,221 INFO L93 Difference]: Finished difference Result 820 states and 1012 transitions. [2021-11-02 13:34:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 13:34:58,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-02 13:34:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:58,224 INFO L225 Difference]: With dead ends: 820 [2021-11-02 13:34:58,224 INFO L226 Difference]: Without dead ends: 667 [2021-11-02 13:34:58,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 290.82ms TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2021-11-02 13:34:58,225 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1438 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 780.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 949.06ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:58,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 0 Invalid, 1965 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [109 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 949.06ms Time] [2021-11-02 13:34:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-02 13:34:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 203. [2021-11-02 13:34:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 196 states have (on average 1.2857142857142858) internal successors, (252), 202 states have internal predecessors, (252), 0 states have call successors, (0), 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 13:34:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 252 transitions. [2021-11-02 13:34:58,234 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 252 transitions. Word has length 52 [2021-11-02 13:34:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:58,234 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 252 transitions. [2021-11-02 13:34:58,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 252 transitions. [2021-11-02 13:34:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 13:34:58,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:58,235 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] [2021-11-02 13:34:58,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 13:34:58,236 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1891199224, now seen corresponding path program 1 times [2021-11-02 13:34:58,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:58,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958530268] [2021-11-02 13:34:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:58,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:58,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:58,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958530268] [2021-11-02 13:34:58,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958530268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:58,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:58,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 13:34:58,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9335494] [2021-11-02 13:34:58,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 13:34:58,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 13:34:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:34:58,282 INFO L87 Difference]: Start difference. First operand 203 states and 252 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:58,451 INFO L93 Difference]: Finished difference Result 372 states and 467 transitions. [2021-11-02 13:34:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 13:34:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-02 13:34:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:58,452 INFO L225 Difference]: With dead ends: 372 [2021-11-02 13:34:58,452 INFO L226 Difference]: Without dead ends: 207 [2021-11-02 13:34:58,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.18ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:34:58,453 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.36ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.77ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:58,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 333 Unknown, 0 Unchecked, 0.36ms Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 156.77ms Time] [2021-11-02 13:34:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-02 13:34:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-11-02 13:34:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 198 states have (on average 1.2676767676767677) internal successors, (251), 204 states have internal predecessors, (251), 0 states have call successors, (0), 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 13:34:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 251 transitions. [2021-11-02 13:34:58,461 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 251 transitions. Word has length 52 [2021-11-02 13:34:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:58,462 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 251 transitions. [2021-11-02 13:34:58,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 251 transitions. [2021-11-02 13:34:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 13:34:58,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:58,463 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] [2021-11-02 13:34:58,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 13:34:58,463 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1119580280, now seen corresponding path program 1 times [2021-11-02 13:34:58,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:58,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139626407] [2021-11-02 13:34:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:58,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:58,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:58,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139626407] [2021-11-02 13:34:58,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139626407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:58,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:58,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:58,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074927834] [2021-11-02 13:34:58,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:58,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:58,516 INFO L87 Difference]: Start difference. First operand 205 states and 251 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:58,811 INFO L93 Difference]: Finished difference Result 377 states and 469 transitions. [2021-11-02 13:34:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:34:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-02 13:34:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:58,815 INFO L225 Difference]: With dead ends: 377 [2021-11-02 13:34:58,815 INFO L226 Difference]: Without dead ends: 206 [2021-11-02 13:34:58,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.46ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:58,816 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.39ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 280.30ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:58,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 509 Unknown, 0 Unchecked, 0.39ms Time], IncrementalHoareTripleChecker [8 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 280.30ms Time] [2021-11-02 13:34:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-02 13:34:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-11-02 13:34:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 193 states have (on average 1.2642487046632125) internal successors, (244), 199 states have internal predecessors, (244), 0 states have call successors, (0), 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 13:34:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2021-11-02 13:34:58,822 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 52 [2021-11-02 13:34:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:58,823 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2021-11-02 13:34:58,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2021-11-02 13:34:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 13:34:58,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:58,824 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] [2021-11-02 13:34:58,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 13:34:58,824 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1671849992, now seen corresponding path program 1 times [2021-11-02 13:34:58,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:58,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980025125] [2021-11-02 13:34:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:58,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:34:58,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:58,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980025125] [2021-11-02 13:34:58,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980025125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:34:58,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:34:58,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:34:58,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194078142] [2021-11-02 13:34:58,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:34:58,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:34:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:34:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:34:58,862 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:34:59,078 INFO L93 Difference]: Finished difference Result 356 states and 437 transitions. [2021-11-02 13:34:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:34:59,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-02 13:34:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:34:59,079 INFO L225 Difference]: With dead ends: 356 [2021-11-02 13:34:59,079 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 13:34:59,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.71ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:34:59,080 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 200.82ms IncrementalHoareTripleChecker+Time [2021-11-02 13:34:59,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 518 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [8 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 200.82ms Time] [2021-11-02 13:34:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 13:34:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2021-11-02 13:34:59,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 173 states have (on average 1.2485549132947977) internal successors, (216), 179 states have internal predecessors, (216), 0 states have call successors, (0), 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 13:34:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2021-11-02 13:34:59,090 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 52 [2021-11-02 13:34:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:34:59,090 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2021-11-02 13:34:59,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:34:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2021-11-02 13:34:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 13:34:59,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:34:59,095 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:34:59,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 13:34:59,095 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:34:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:34:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1322921012, now seen corresponding path program 1 times [2021-11-02 13:34:59,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:34:59,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486067631] [2021-11-02 13:34:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:59,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:34:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:34:59,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:34:59,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486067631] [2021-11-02 13:34:59,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486067631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:34:59,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451772736] [2021-11-02 13:34:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:34:59,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:34:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:34:59,548 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 13:34:59,619 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 13:34:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:34:59,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 13:34:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:34:59,804 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:34:59,805 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 13:34:59,814 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:34:59,814 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 13:35:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:02,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:35:02,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451772736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:02,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:35:02,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2021-11-02 13:35:02,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964047287] [2021-11-02 13:35:02,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 13:35:02,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 13:35:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2021-11-02 13:35:02,305 INFO L87 Difference]: Start difference. First operand 180 states and 216 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:02,469 INFO L93 Difference]: Finished difference Result 295 states and 357 transitions. [2021-11-02 13:35:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 13:35:02,469 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 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 53 [2021-11-02 13:35:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:02,470 INFO L225 Difference]: With dead ends: 295 [2021-11-02 13:35:02,470 INFO L226 Difference]: Without dead ends: 206 [2021-11-02 13:35:02,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1379.70ms TimeCoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-02 13:35:02,471 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 134.05ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:02,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 959 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [0 Valid, 337 Invalid, 0 Unknown, 622 Unchecked, 134.05ms Time] [2021-11-02 13:35:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-02 13:35:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-02 13:35:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.256281407035176) internal successors, (250), 205 states have internal predecessors, (250), 0 states have call successors, (0), 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 13:35:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 250 transitions. [2021-11-02 13:35:02,478 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 250 transitions. Word has length 53 [2021-11-02 13:35:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:02,479 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 250 transitions. [2021-11-02 13:35:02,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 250 transitions. [2021-11-02 13:35:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 13:35:02,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:02,479 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:02,498 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 13:35:02,680 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,SelfDestructingSolverStorable14 [2021-11-02 13:35:02,680 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1324768054, now seen corresponding path program 1 times [2021-11-02 13:35:02,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:02,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271168459] [2021-11-02 13:35:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:02,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:02,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:02,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271168459] [2021-11-02 13:35:02,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271168459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:02,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508864082] [2021-11-02 13:35:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:02,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:02,918 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 13:35:02,919 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 13:35:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:03,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 13:35:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:03,088 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 13:35:03,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-02 13:35:03,453 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 41 treesize of output 29 [2021-11-02 13:35:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:03,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:35:03,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508864082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:03,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:35:03,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2021-11-02 13:35:03,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432886139] [2021-11-02 13:35:03,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 13:35:03,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:03,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 13:35:03,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-11-02 13:35:03,503 INFO L87 Difference]: Start difference. First operand 206 states and 250 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:04,242 INFO L93 Difference]: Finished difference Result 500 states and 605 transitions. [2021-11-02 13:35:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 13:35:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 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 53 [2021-11-02 13:35:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:04,244 INFO L225 Difference]: With dead ends: 500 [2021-11-02 13:35:04,244 INFO L226 Difference]: Without dead ends: 404 [2021-11-02 13:35:04,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 414.96ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-11-02 13:35:04,245 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 752 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 398.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 479.72ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:04,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 0 Invalid, 1321 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [29 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 479.72ms Time] [2021-11-02 13:35:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-02 13:35:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 284. [2021-11-02 13:35:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 277 states have (on average 1.2310469314079422) internal successors, (341), 283 states have internal predecessors, (341), 0 states have call successors, (0), 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 13:35:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 341 transitions. [2021-11-02 13:35:04,305 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 341 transitions. Word has length 53 [2021-11-02 13:35:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:04,305 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 341 transitions. [2021-11-02 13:35:04,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 341 transitions. [2021-11-02 13:35:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 13:35:04,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:04,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:04,330 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 13:35:04,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:04,522 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:04,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1195191880, now seen corresponding path program 1 times [2021-11-02 13:35:04,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:04,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149697581] [2021-11-02 13:35:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:04,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:04,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:04,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149697581] [2021-11-02 13:35:04,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149697581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:04,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859633511] [2021-11-02 13:35:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:04,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:04,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:04,788 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 13:35:04,790 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 13:35:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 13:35:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:04,932 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:35:04,933 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 13:35:04,948 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:35:04,948 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 13:35:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:06,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:35:06,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859633511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:06,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:35:06,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 23 [2021-11-02 13:35:06,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878849730] [2021-11-02 13:35:06,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 13:35:06,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 13:35:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-02 13:35:06,392 INFO L87 Difference]: Start difference. First operand 284 states and 341 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:06,620 INFO L93 Difference]: Finished difference Result 377 states and 451 transitions. [2021-11-02 13:35:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 13:35:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 53 [2021-11-02 13:35:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:06,622 INFO L225 Difference]: With dead ends: 377 [2021-11-02 13:35:06,622 INFO L226 Difference]: Without dead ends: 285 [2021-11-02 13:35:06,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 451.07ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-11-02 13:35:06,623 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 178.35ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:06,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 1386 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [1 Valid, 483 Invalid, 0 Unknown, 902 Unchecked, 178.35ms Time] [2021-11-02 13:35:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-02 13:35:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2021-11-02 13:35:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 277 states have (on average 1.2238267148014441) internal successors, (339), 283 states have internal predecessors, (339), 0 states have call successors, (0), 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 13:35:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 339 transitions. [2021-11-02 13:35:06,640 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 339 transitions. Word has length 53 [2021-11-02 13:35:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:06,640 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 339 transitions. [2021-11-02 13:35:06,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 339 transitions. [2021-11-02 13:35:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 13:35:06,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:06,641 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:06,688 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 13:35:06,855 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,SelfDestructingSolverStorable16 [2021-11-02 13:35:06,856 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash -515133510, now seen corresponding path program 1 times [2021-11-02 13:35:06,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:06,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312288036] [2021-11-02 13:35:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:06,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:07,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:07,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312288036] [2021-11-02 13:35:07,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312288036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:07,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860429057] [2021-11-02 13:35:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:07,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:07,036 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 13:35:07,093 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 13:35:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-02 13:35:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:07,233 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:35:07,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-02 13:35:08,385 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 41 treesize of output 29 [2021-11-02 13:35:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:08,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:35:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 333 [2021-11-02 13:35:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:08,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860429057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:35:08,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:35:08,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 28 [2021-11-02 13:35:08,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387353102] [2021-11-02 13:35:08,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 13:35:08,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 13:35:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-11-02 13:35:08,811 INFO L87 Difference]: Start difference. First operand 284 states and 339 transitions. Second operand has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 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 13:35:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:09,637 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2021-11-02 13:35:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 13:35:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 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 53 [2021-11-02 13:35:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:09,639 INFO L225 Difference]: With dead ends: 478 [2021-11-02 13:35:09,639 INFO L226 Difference]: Without dead ends: 384 [2021-11-02 13:35:09,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1045.90ms TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 13:35:09,640 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 561.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.87ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 679.92ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:09,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 2269 Unknown, 0 Unchecked, 3.87ms Time], IncrementalHoareTripleChecker [6 Valid, 1950 Invalid, 0 Unknown, 313 Unchecked, 679.92ms Time] [2021-11-02 13:35:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-02 13:35:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 312. [2021-11-02 13:35:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 305 states have (on average 1.2131147540983607) internal successors, (370), 311 states have internal predecessors, (370), 0 states have call successors, (0), 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 13:35:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 370 transitions. [2021-11-02 13:35:09,654 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 370 transitions. Word has length 53 [2021-11-02 13:35:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:09,654 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 370 transitions. [2021-11-02 13:35:09,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 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 13:35:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 370 transitions. [2021-11-02 13:35:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 13:35:09,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:09,655 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:09,673 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 13:35:09,871 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 13:35:09,872 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1401036871, now seen corresponding path program 1 times [2021-11-02 13:35:09,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:09,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757905519] [2021-11-02 13:35:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:09,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:09,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:09,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757905519] [2021-11-02 13:35:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757905519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:09,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:35:09,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:35:09,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985485922] [2021-11-02 13:35:09,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:35:09,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:35:09,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:35:09,943 INFO L87 Difference]: Start difference. First operand 312 states and 370 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:35:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:10,120 INFO L93 Difference]: Finished difference Result 402 states and 477 transitions. [2021-11-02 13:35:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:35:10,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 55 [2021-11-02 13:35:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:10,122 INFO L225 Difference]: With dead ends: 402 [2021-11-02 13:35:10,122 INFO L226 Difference]: Without dead ends: 312 [2021-11-02 13:35:10,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.36ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-02 13:35:10,124 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 525 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.64ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:10,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 0 Invalid, 227 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [16 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 147.64ms Time] [2021-11-02 13:35:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-02 13:35:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-11-02 13:35:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 305 states have (on average 1.2098360655737705) internal successors, (369), 311 states have internal predecessors, (369), 0 states have call successors, (0), 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 13:35:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 369 transitions. [2021-11-02 13:35:10,142 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 369 transitions. Word has length 55 [2021-11-02 13:35:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:10,143 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 369 transitions. [2021-11-02 13:35:10,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:35:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 369 transitions. [2021-11-02 13:35:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 13:35:10,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:10,144 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:10,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 13:35:10,144 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 619543768, now seen corresponding path program 1 times [2021-11-02 13:35:10,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:10,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326197837] [2021-11-02 13:35:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:10,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:35:10,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:10,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326197837] [2021-11-02 13:35:10,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326197837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:10,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952998245] [2021-11-02 13:35:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:10,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:10,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:10,412 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 13:35:10,413 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 13:35:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:10,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 13:35:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:10,518 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 13:35:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:10,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-02 13:35:10,617 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 13:35:10,618 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 13:35:10,712 INFO L354 Elim1Store]: treesize reduction 124, result has 18.4 percent of original size [2021-11-02 13:35:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 53 [2021-11-02 13:35:13,093 INFO L354 Elim1Store]: treesize reduction 93, result has 11.4 percent of original size [2021-11-02 13:35:13,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 52 [2021-11-02 13:35:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:13,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:35:18,455 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 3321 treesize of output 3289 [2021-11-02 13:35:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:19,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952998245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:35:19,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:35:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2021-11-02 13:35:19,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211899087] [2021-11-02 13:35:19,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 13:35:19,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 13:35:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=720, Unknown=3, NotChecked=0, Total=812 [2021-11-02 13:35:19,150 INFO L87 Difference]: Start difference. First operand 312 states and 369 transitions. Second operand has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 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 13:35:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:23,624 INFO L93 Difference]: Finished difference Result 1760 states and 2069 transitions. [2021-11-02 13:35:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 13:35:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 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 55 [2021-11-02 13:35:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:23,628 INFO L225 Difference]: With dead ends: 1760 [2021-11-02 13:35:23,628 INFO L226 Difference]: Without dead ends: 1596 [2021-11-02 13:35:23,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 7027.21ms TimeCoverageRelationStatistics Valid=761, Invalid=4348, Unknown=3, NotChecked=0, Total=5112 [2021-11-02 13:35:23,630 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3777 mSDsluCounter, 4662 mSDsCounter, 0 mSdLazyCounter, 5709 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2293.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.18ms SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 5709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 2752.13ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:23,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3777 Valid, 0 Invalid, 6446 Unknown, 0 Unchecked, 20.18ms Time], IncrementalHoareTripleChecker [132 Valid, 5709 Invalid, 0 Unknown, 605 Unchecked, 2752.13ms Time] [2021-11-02 13:35:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-11-02 13:35:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 286. [2021-11-02 13:35:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 279 states have (on average 1.2150537634408602) internal successors, (339), 285 states have internal predecessors, (339), 0 states have call successors, (0), 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 13:35:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 339 transitions. [2021-11-02 13:35:23,653 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 339 transitions. Word has length 55 [2021-11-02 13:35:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:23,653 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 339 transitions. [2021-11-02 13:35:23,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 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 13:35:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 339 transitions. [2021-11-02 13:35:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 13:35:23,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:23,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:23,672 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 13:35:23,872 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 13:35:23,872 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1939570492, now seen corresponding path program 1 times [2021-11-02 13:35:23,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:23,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972588410] [2021-11-02 13:35:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:23,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:35:23,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:23,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972588410] [2021-11-02 13:35:23,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972588410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:23,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:35:23,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:35:23,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459853372] [2021-11-02 13:35:23,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:35:23,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:35:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:35:23,934 INFO L87 Difference]: Start difference. First operand 286 states and 339 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 13:35:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:24,242 INFO L93 Difference]: Finished difference Result 564 states and 674 transitions. [2021-11-02 13:35:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:35:24,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 13:35:24,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:24,244 INFO L225 Difference]: With dead ends: 564 [2021-11-02 13:35:24,244 INFO L226 Difference]: Without dead ends: 389 [2021-11-02 13:35:24,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.60ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:35:24,245 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 226.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 280.25ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:24,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 634 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [12 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 280.25ms Time] [2021-11-02 13:35:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-02 13:35:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 276. [2021-11-02 13:35:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 269 states have (on average 1.1970260223048328) internal successors, (322), 275 states have internal predecessors, (322), 0 states have call successors, (0), 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 13:35:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 322 transitions. [2021-11-02 13:35:24,261 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 322 transitions. Word has length 60 [2021-11-02 13:35:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:24,261 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 322 transitions. [2021-11-02 13:35:24,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 13:35:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 322 transitions. [2021-11-02 13:35:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 13:35:24,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:24,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:24,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 13:35:24,265 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1492137016, now seen corresponding path program 2 times [2021-11-02 13:35:24,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:24,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895040631] [2021-11-02 13:35:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:24,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 13:35:24,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:24,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895040631] [2021-11-02 13:35:24,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895040631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:24,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:35:24,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:35:24,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547841025] [2021-11-02 13:35:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:35:24,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:35:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:35:24,319 INFO L87 Difference]: Start difference. First operand 276 states and 322 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:24,750 INFO L93 Difference]: Finished difference Result 550 states and 642 transitions. [2021-11-02 13:35:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:35:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:24,754 INFO L225 Difference]: With dead ends: 550 [2021-11-02 13:35:24,754 INFO L226 Difference]: Without dead ends: 401 [2021-11-02 13:35:24,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.13ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:35:24,755 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 227 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 312.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 385.31ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:24,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 0 Invalid, 914 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [10 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 385.31ms Time] [2021-11-02 13:35:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-02 13:35:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 276. [2021-11-02 13:35:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 269 states have (on average 1.1821561338289963) internal successors, (318), 275 states have internal predecessors, (318), 0 states have call successors, (0), 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 13:35:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 318 transitions. [2021-11-02 13:35:24,769 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 318 transitions. Word has length 60 [2021-11-02 13:35:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:24,769 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 318 transitions. [2021-11-02 13:35:24,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 318 transitions. [2021-11-02 13:35:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 13:35:24,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:24,770 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] [2021-11-02 13:35:24,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 13:35:24,771 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash -268357848, now seen corresponding path program 2 times [2021-11-02 13:35:24,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:24,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599795327] [2021-11-02 13:35:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:24,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:35:24,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599795327] [2021-11-02 13:35:24,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599795327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456083436] [2021-11-02 13:35:24,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 13:35:24,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:24,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:24,881 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 13:35:24,886 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 13:35:24,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 13:35:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 13:35:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 13:35:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:25,018 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 13:35:25,019 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 13:35:25,034 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-02 13:35:25,035 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 13:35:26,476 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset Int)) (let ((.cse1 (+ ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset 24))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base|) .cse1)) (.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base|) .cse1))) (and (or (and (= |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base| .cse0) (= .cse1 .cse2)) (= (+ 16 ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset) (select (select |c_#memory_$Pointer$.offset| .cse0) .cse2))) (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse2) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base|))))) is different from true [2021-11-02 13:35:27,758 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-02 13:35:27,758 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 13:35:27,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:35:27,775 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 13:35:27,921 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 13:35:27,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:35:27,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456083436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:27,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:35:27,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 17 [2021-11-02 13:35:27,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883814083] [2021-11-02 13:35:27,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 13:35:27,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 13:35:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=209, Unknown=1, NotChecked=28, Total=272 [2021-11-02 13:35:27,922 INFO L87 Difference]: Start difference. First operand 276 states and 318 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:28,164 INFO L93 Difference]: Finished difference Result 369 states and 427 transitions. [2021-11-02 13:35:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 13:35:28,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 13:35:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:28,165 INFO L225 Difference]: With dead ends: 369 [2021-11-02 13:35:28,165 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 13:35:28,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1668.06ms TimeCoverageRelationStatistics Valid=41, Invalid=268, Unknown=1, NotChecked=32, Total=342 [2021-11-02 13:35:28,166 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 197.57ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:28,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 1244 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [1 Valid, 475 Invalid, 0 Unknown, 768 Unchecked, 197.57ms Time] [2021-11-02 13:35:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 13:35:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2021-11-02 13:35:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 269 states have (on average 1.174721189591078) internal successors, (316), 275 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 13:35:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2021-11-02 13:35:28,179 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 61 [2021-11-02 13:35:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:28,179 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2021-11-02 13:35:28,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 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 13:35:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2021-11-02 13:35:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 13:35:28,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:28,180 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:28,200 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 13:35:28,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:28,398 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash -802042588, now seen corresponding path program 1 times [2021-11-02 13:35:28,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:28,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617951287] [2021-11-02 13:35:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:28,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:28,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:28,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617951287] [2021-11-02 13:35:28,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617951287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:28,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547306497] [2021-11-02 13:35:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:28,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:28,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:28,553 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 13:35:28,554 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 13:35:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:28,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 13:35:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:28,712 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 13:35:28,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:35:28,878 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 13:35:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:28,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:35:29,013 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 35 treesize of output 27 [2021-11-02 13:35:29,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:35:29,019 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 27 treesize of output 26 [2021-11-02 13:35:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547306497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:35:29,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:35:29,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2021-11-02 13:35:29,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359449529] [2021-11-02 13:35:29,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 13:35:29,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 13:35:29,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-11-02 13:35:29,096 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 13:35:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:30,020 INFO L93 Difference]: Finished difference Result 504 states and 585 transitions. [2021-11-02 13:35:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 13:35:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 13:35:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:30,022 INFO L225 Difference]: With dead ends: 504 [2021-11-02 13:35:30,022 INFO L226 Difference]: Without dead ends: 355 [2021-11-02 13:35:30,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 282.86ms TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-11-02 13:35:30,023 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 156 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 647.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.66ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 799.98ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:30,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 0 Invalid, 2324 Unknown, 0 Unchecked, 4.66ms Time], IncrementalHoareTripleChecker [17 Valid, 2286 Invalid, 0 Unknown, 21 Unchecked, 799.98ms Time] [2021-11-02 13:35:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-02 13:35:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 286. [2021-11-02 13:35:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 279 states have (on average 1.168458781362007) internal successors, (326), 285 states have internal predecessors, (326), 0 states have call successors, (0), 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 13:35:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 326 transitions. [2021-11-02 13:35:30,038 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 326 transitions. Word has length 61 [2021-11-02 13:35:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:30,038 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 326 transitions. [2021-11-02 13:35:30,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 13:35:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 326 transitions. [2021-11-02 13:35:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 13:35:30,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:30,039 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] [2021-11-02 13:35:30,057 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 13:35:30,255 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 13:35:30,255 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -230671802, now seen corresponding path program 2 times [2021-11-02 13:35:30,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:30,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245930912] [2021-11-02 13:35:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:30,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 13:35:30,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:30,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245930912] [2021-11-02 13:35:30,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245930912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:30,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:35:30,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 13:35:30,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969964052] [2021-11-02 13:35:30,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 13:35:30,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 13:35:30,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:35:30,405 INFO L87 Difference]: Start difference. First operand 286 states and 326 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:35:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:31,042 INFO L93 Difference]: Finished difference Result 488 states and 566 transitions. [2021-11-02 13:35:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:35:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 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 63 [2021-11-02 13:35:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:31,044 INFO L225 Difference]: With dead ends: 488 [2021-11-02 13:35:31,044 INFO L226 Difference]: Without dead ends: 400 [2021-11-02 13:35:31,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.33ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-02 13:35:31,045 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 676 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 457.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 555.42ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:31,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 0 Invalid, 1323 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [38 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 555.42ms Time] [2021-11-02 13:35:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-02 13:35:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 340. [2021-11-02 13:35:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 333 states have (on average 1.1801801801801801) internal successors, (393), 339 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 393 transitions. [2021-11-02 13:35:31,063 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 393 transitions. Word has length 63 [2021-11-02 13:35:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:31,064 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 393 transitions. [2021-11-02 13:35:31,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:35:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 393 transitions. [2021-11-02 13:35:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 13:35:31,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:31,065 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] [2021-11-02 13:35:31,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 13:35:31,065 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1369508788, now seen corresponding path program 1 times [2021-11-02 13:35:31,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:31,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149065319] [2021-11-02 13:35:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:31,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 13:35:31,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:31,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149065319] [2021-11-02 13:35:31,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149065319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:31,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:35:31,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:35:31,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022549470] [2021-11-02 13:35:31,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:35:31,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:35:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:35:31,132 INFO L87 Difference]: Start difference. First operand 340 states and 393 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:35:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:31,317 INFO L93 Difference]: Finished difference Result 432 states and 500 transitions. [2021-11-02 13:35:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:35:31,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 63 [2021-11-02 13:35:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:31,318 INFO L225 Difference]: With dead ends: 432 [2021-11-02 13:35:31,318 INFO L226 Difference]: Without dead ends: 338 [2021-11-02 13:35:31,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.47ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:35:31,319 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 249 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.14ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:31,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 158.14ms Time] [2021-11-02 13:35:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-02 13:35:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2021-11-02 13:35:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 331 states have (on average 1.1752265861027191) internal successors, (389), 337 states have internal predecessors, (389), 0 states have call successors, (0), 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 13:35:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 389 transitions. [2021-11-02 13:35:31,339 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 389 transitions. Word has length 63 [2021-11-02 13:35:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:31,339 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 389 transitions. [2021-11-02 13:35:31,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 13:35:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 389 transitions. [2021-11-02 13:35:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 13:35:31,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:31,340 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:31,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-02 13:35:31,340 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1567579282, now seen corresponding path program 2 times [2021-11-02 13:35:31,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:31,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390103351] [2021-11-02 13:35:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:31,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:31,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:31,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390103351] [2021-11-02 13:35:31,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390103351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:31,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212753183] [2021-11-02 13:35:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 13:35:31,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:31,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:31,430 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 13:35:31,431 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 13:35:31,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 13:35:31,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 13:35:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 13:35:31,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:31,556 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:35:31,556 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 13:35:31,565 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:35:31,565 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 13:35:33,581 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset Int)) (let ((.cse1 (+ ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset 24))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base|) .cse1)) (.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base|) .cse1))) (and (or (and (= |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base| .cse0) (= .cse1 .cse2)) (= (+ 16 ULTIMATE.start_ensure_linked_list_is_allocated_~list.offset) (select (select |c_#memory_$Pointer$.offset| .cse0) .cse2))) (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse2) |c_ULTIMATE.start_aws_linked_list_back_harness_~#list~0.base|))))) is different from true [2021-11-02 13:35:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 13:35:35,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:35:35,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212753183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:35:35,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 13:35:35,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-02 13:35:35,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025799691] [2021-11-02 13:35:35,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 13:35:35,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:35,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 13:35:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=156, Unknown=1, NotChecked=24, Total=210 [2021-11-02 13:35:35,108 INFO L87 Difference]: Start difference. First operand 338 states and 389 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 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 13:35:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:35,251 INFO L93 Difference]: Finished difference Result 452 states and 528 transitions. [2021-11-02 13:35:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 13:35:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 13:35:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:35,252 INFO L225 Difference]: With dead ends: 452 [2021-11-02 13:35:35,253 INFO L226 Difference]: Without dead ends: 338 [2021-11-02 13:35:35,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2158.23ms TimeCoverageRelationStatistics Valid=32, Invalid=181, Unknown=1, NotChecked=26, Total=240 [2021-11-02 13:35:35,253 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 94.87ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:35,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 923 Unknown, 0 Unchecked, 12.88ms Time], IncrementalHoareTripleChecker [0 Valid, 325 Invalid, 0 Unknown, 598 Unchecked, 94.87ms Time] [2021-11-02 13:35:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-02 13:35:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 332. [2021-11-02 13:35:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 325 states have (on average 1.1723076923076923) internal successors, (381), 331 states have internal predecessors, (381), 0 states have call successors, (0), 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 13:35:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 381 transitions. [2021-11-02 13:35:35,301 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 381 transitions. Word has length 69 [2021-11-02 13:35:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:35,301 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 381 transitions. [2021-11-02 13:35:35,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 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 13:35:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 381 transitions. [2021-11-02 13:35:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 13:35:35,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:35,302 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:35:35,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 13:35:35,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 13:35:35,522 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:35,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -950533610, now seen corresponding path program 1 times [2021-11-02 13:35:35,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:35,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700592566] [2021-11-02 13:35:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:35,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:35,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:35,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700592566] [2021-11-02 13:35:35,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700592566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:35,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833752958] [2021-11-02 13:35:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:35,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:35,632 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:35:35,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 13:35:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 13:35:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:36,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:35:36,009 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 61 treesize of output 48 [2021-11-02 13:35:36,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:35:36,016 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 42 treesize of output 37 [2021-11-02 13:35:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 13:35:36,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:35:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 13:35:36,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833752958] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:36,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-02 13:35:36,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 14 [2021-11-02 13:35:36,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371832740] [2021-11-02 13:35:36,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:35:36,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:35:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 13:35:36,180 INFO L87 Difference]: Start difference. First operand 332 states and 381 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 13:35:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:36,860 INFO L93 Difference]: Finished difference Result 750 states and 888 transitions. [2021-11-02 13:35:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:35:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 13:35:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:36,862 INFO L225 Difference]: With dead ends: 750 [2021-11-02 13:35:36,862 INFO L226 Difference]: Without dead ends: 516 [2021-11-02 13:35:36,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 215.11ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-02 13:35:36,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 337 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 466.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 609.40ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:36,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 0 Invalid, 1242 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [20 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 609.40ms Time] [2021-11-02 13:35:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-02 13:35:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 278. [2021-11-02 13:35:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 271 states have (on average 1.1808118081180812) internal successors, (320), 277 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:35:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 320 transitions. [2021-11-02 13:35:36,887 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 320 transitions. Word has length 69 [2021-11-02 13:35:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:36,887 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 320 transitions. [2021-11-02 13:35:36,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 13:35:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 320 transitions. [2021-11-02 13:35:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 13:35:36,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:36,888 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] [2021-11-02 13:35:36,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 13:35:37,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 13:35:37,119 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:37,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash -414228359, now seen corresponding path program 1 times [2021-11-02 13:35:37,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:37,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126068317] [2021-11-02 13:35:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:37,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:37,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:37,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126068317] [2021-11-02 13:35:37,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126068317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:37,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299942222] [2021-11-02 13:35:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:37,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:37,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:35:37,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 13:35:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-02 13:35:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:37,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:37,675 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 13:35:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:37,680 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 13:35:38,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:38,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:38,042 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 13:35:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:38,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:35:38,146 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 13:35:38,147 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 35 treesize of output 22 [2021-11-02 13:35:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:38,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:35:38,414 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 749 treesize of output 741 [2021-11-02 13:35:38,761 INFO L354 Elim1Store]: treesize reduction 250, result has 49.8 percent of original size [2021-11-02 13:35:38,761 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 6865 treesize of output 6384 [2021-11-02 13:35:38,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:35:38,901 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 6380 treesize of output 6380 [2021-11-02 13:35:39,052 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-11-02 13:35:39,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 23 [2021-11-02 13:35:39,127 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-02 13:35:39,472 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-02 13:35:39,513 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-02 13:35:46,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:46,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-11-02 13:35:46,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:46,522 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-02 13:35:46,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-02 13:35:46,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:46,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-02 13:35:46,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:46,777 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-02 13:35:46,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-02 13:35:47,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 13:35:47,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:35:47,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 252 [2021-11-02 13:35:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:35:54,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299942222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:35:54,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 13:35:54,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2021-11-02 13:35:54,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252106739] [2021-11-02 13:35:54,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 13:35:54,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:35:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 13:35:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-11-02 13:35:54,440 INFO L87 Difference]: Start difference. First operand 278 states and 320 transitions. Second operand has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:35:56,973 INFO L93 Difference]: Finished difference Result 411 states and 470 transitions. [2021-11-02 13:35:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 13:35:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 13:35:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:35:56,974 INFO L225 Difference]: With dead ends: 411 [2021-11-02 13:35:56,974 INFO L226 Difference]: Without dead ends: 244 [2021-11-02 13:35:56,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1333.77ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 13:35:56,976 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1060 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 3324 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1456.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.34ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1697.34ms IncrementalHoareTripleChecker+Time [2021-11-02 13:35:56,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 0 Invalid, 3379 Unknown, 0 Unchecked, 9.34ms Time], IncrementalHoareTripleChecker [55 Valid, 3324 Invalid, 0 Unknown, 0 Unchecked, 1697.34ms Time] [2021-11-02 13:35:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-02 13:35:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-11-02 13:35:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 174 states have internal predecessors, (199), 0 states have call successors, (0), 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 13:35:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 199 transitions. [2021-11-02 13:35:56,987 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 199 transitions. Word has length 71 [2021-11-02 13:35:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:35:56,987 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 199 transitions. [2021-11-02 13:35:56,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:35:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 199 transitions. [2021-11-02 13:35:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 13:35:56,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:35:56,988 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] [2021-11-02 13:35:57,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 13:35:57,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 13:35:57,203 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:35:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:35:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash -370008677, now seen corresponding path program 1 times [2021-11-02 13:35:57,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:35:57,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943777736] [2021-11-02 13:35:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:57,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:35:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 13:35:57,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:35:57,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943777736] [2021-11-02 13:35:57,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943777736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:35:57,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332003064] [2021-11-02 13:35:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:35:57,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:35:57,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:35:57,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:35:57,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 13:35:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:35:57,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-02 13:35:57,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:35:57,876 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-02 13:35:57,877 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 13:35:57,885 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-02 13:35:57,886 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 13:36:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 13:36:10,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:36:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 13:36:11,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332003064] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-02 13:36:11,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-02 13:36:11,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [20, 23] total 51 [2021-11-02 13:36:11,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5704563] [2021-11-02 13:36:11,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 13:36:11,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:36:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 13:36:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2321, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 13:36:11,659 INFO L87 Difference]: Start difference. First operand 175 states and 199 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:36:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:36:13,174 INFO L93 Difference]: Finished difference Result 312 states and 358 transitions. [2021-11-02 13:36:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 13:36:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 13:36:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:36:13,176 INFO L225 Difference]: With dead ends: 312 [2021-11-02 13:36:13,176 INFO L226 Difference]: Without dead ends: 220 [2021-11-02 13:36:13,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 12289.91ms TimeCoverageRelationStatistics Valid=579, Invalid=3711, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 13:36:13,178 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 691 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 675.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.37ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 797.66ms IncrementalHoareTripleChecker+Time [2021-11-02 13:36:13,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 0 Invalid, 1496 Unknown, 0 Unchecked, 4.37ms Time], IncrementalHoareTripleChecker [34 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 797.66ms Time] [2021-11-02 13:36:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-02 13:36:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 175. [2021-11-02 13:36:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.1785714285714286) internal successors, (198), 174 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 13:36:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 198 transitions. [2021-11-02 13:36:13,191 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 198 transitions. Word has length 73 [2021-11-02 13:36:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:36:13,191 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 198 transitions. [2021-11-02 13:36:13,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:36:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 198 transitions. [2021-11-02 13:36:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 13:36:13,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:36:13,192 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] [2021-11-02 13:36:13,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 13:36:13,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:36:13,411 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:36:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:36:13,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2140195802, now seen corresponding path program 1 times [2021-11-02 13:36:13,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:36:13,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684558916] [2021-11-02 13:36:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:36:13,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:36:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:36:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 13:36:13,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:36:13,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684558916] [2021-11-02 13:36:13,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684558916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:36:13,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:36:13,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:36:13,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539603029] [2021-11-02 13:36:13,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:36:13,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:36:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:36:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:36:13,471 INFO L87 Difference]: Start difference. First operand 175 states and 198 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 13:36:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:36:13,858 INFO L93 Difference]: Finished difference Result 274 states and 310 transitions. [2021-11-02 13:36:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:36:13,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 76 [2021-11-02 13:36:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:36:13,859 INFO L225 Difference]: With dead ends: 274 [2021-11-02 13:36:13,859 INFO L226 Difference]: Without dead ends: 270 [2021-11-02 13:36:13,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.35ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:36:13,860 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 246 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 277.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 339.55ms IncrementalHoareTripleChecker+Time [2021-11-02 13:36:13,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 0 Invalid, 760 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [8 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 339.55ms Time] [2021-11-02 13:36:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-02 13:36:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 183. [2021-11-02 13:36:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 182 states have internal predecessors, (206), 0 states have call successors, (0), 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 13:36:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 206 transitions. [2021-11-02 13:36:13,895 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 206 transitions. Word has length 76 [2021-11-02 13:36:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:36:13,895 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 206 transitions. [2021-11-02 13:36:13,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 13:36:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 206 transitions. [2021-11-02 13:36:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 13:36:13,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:36:13,896 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:36:13,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-02 13:36:13,897 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-02 13:36:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:36:13,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1144589933, now seen corresponding path program 1 times [2021-11-02 13:36:13,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:36:13,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401424006] [2021-11-02 13:36:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:36:13,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:36:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:36:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:36:14,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:36:14,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401424006] [2021-11-02 13:36:14,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401424006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 13:36:14,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521222536] [2021-11-02 13:36:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:36:14,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:36:14,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:36:14,471 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:36:14,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 13:36:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:36:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-02 13:36:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:36:14,604 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 13:36:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:36:14,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-02 13:36:14,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 13:36:14,711 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 13:36:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-02 13:36:14,850 INFO L354 Elim1Store]: treesize reduction 182, result has 15.0 percent of original size [2021-11-02 13:36:14,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 160 treesize of output 108 [2021-11-02 13:36:14,873 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-02 13:36:14,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 94 [2021-11-02 13:36:16,864 INFO L354 Elim1Store]: treesize reduction 122, result has 5.4 percent of original size [2021-11-02 13:36:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 227 treesize of output 120 [2021-11-02 13:36:16,880 INFO L354 Elim1Store]: treesize reduction 90, result has 10.9 percent of original size [2021-11-02 13:36:16,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-11-02 13:36:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:36:16,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:36:26,659 WARN L210 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 663 DAG size of output: 323 [2021-11-02 13:36:26,661 INFO L354 Elim1Store]: treesize reduction 23607, result has 25.0 percent of original size [2021-11-02 13:36:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 21 new quantified variables, introduced 108 case distinctions, treesize of input 207751432 treesize of output 195847859 Killed by 15