./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_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 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:57:07,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:57:07,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:57:07,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:57:07,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:57:07,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:57:07,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:57:07,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:57:07,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:57:07,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:57:07,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:57:07,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:57:07,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:57:07,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:57:07,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:57:07,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:57:07,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:57:07,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:57:07,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:57:07,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:57:07,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:57:07,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:57:07,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:57:07,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:57:07,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:57:07,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:57:07,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:57:07,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:57:07,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:57:07,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:57:07,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:57:07,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:57:07,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:57:07,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:57:07,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:57:07,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:57:07,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:57:07,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:57:07,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:57:07,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:57:07,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:57:07,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-17 23:57:07,752 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:57:07,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:57:07,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:57:07,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:57:07,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:57:07,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:57:07,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:57:07,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:57:07,758 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:57:07,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:57:07,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:57:07,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:57:07,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:57:07,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:57:07,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:57:07,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:57:07,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:57:07,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:57:07,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:57:07,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:57:07,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:57:07,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:57:07,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:57:07,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:57:07,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:57:07,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:57:07,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:57:07,761 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:57:07,761 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:57:07,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:57:07,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:57:07,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2021-12-17 23:57:07,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:57:07,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:57:07,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:57:07,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:57:07,960 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:57:07,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-12-17 23:57:08,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8603edb/c8338b95642d4173bdad105335c393cd/FLAG00deb2731 [2021-12-17 23:57:08,583 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:57:08,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-12-17 23:57:08,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8603edb/c8338b95642d4173bdad105335c393cd/FLAG00deb2731 [2021-12-17 23:57:08,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8603edb/c8338b95642d4173bdad105335c393cd [2021-12-17 23:57:08,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:57:08,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:57:08,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:57:08,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:57:08,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:57:08,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:57:08" (1/1) ... [2021-12-17 23:57:08,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172aa7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:08, skipping insertion in model container [2021-12-17 23:57:08,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:57:08" (1/1) ... [2021-12-17 23:57:08,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:57:08,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:57:09,049 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-12-17 23:57:09,055 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-12-17 23:57:09,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,570 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,570 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,571 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,588 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,589 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,590 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,590 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:09,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:57:09,804 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:57:09,805 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:57:09,806 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:57:09,807 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:57:09,809 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:57:09,810 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:57:09,810 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:57:09,812 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:57:09,813 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:57:09,913 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:57:10,020 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,020 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:57:10,120 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:57:10,132 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-12-17 23:57:10,133 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-12-17 23:57:10,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,169 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,169 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,170 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,170 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,188 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:57:10,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:57:10,190 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:57:10,190 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:57:10,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:57:10,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:57:10,191 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:57:10,192 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:57:10,192 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:57:10,192 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:57:10,204 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:57:10,280 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,281 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:57:10,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:57:10,470 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:57:10,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10 WrapperNode [2021-12-17 23:57:10,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:57:10,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:57:10,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:57:10,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:57:10,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,615 INFO L137 Inliner]: procedures = 691, calls = 2661, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 862 [2021-12-17 23:57:10,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:57:10,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:57:10,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:57:10,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:57:10,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:57:10,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:57:10,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:57:10,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:57:10,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (1/1) ... [2021-12-17 23:57:10,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:57:10,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:10,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 23:57:10,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 23:57:10,766 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-17 23:57:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-17 23:57:10,766 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-12-17 23:57:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-12-17 23:57:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:57:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-17 23:57:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-17 23:57:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:57:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 23:57:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 23:57:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:57:10,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:57:10,769 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-17 23:57:10,769 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-17 23:57:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 23:57:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-17 23:57:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-17 23:57:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:57:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:57:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-17 23:57:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-17 23:57:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-17 23:57:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-17 23:57:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 23:57:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 23:57:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:57:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 23:57:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 23:57:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-17 23:57:10,772 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-17 23:57:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-12-17 23:57:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-12-17 23:57:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:57:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-12-17 23:57:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-12-17 23:57:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:57:11,045 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:57:11,047 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:57:11,624 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:57:11,630 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:57:11,631 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 23:57:11,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:57:11 BoogieIcfgContainer [2021-12-17 23:57:11,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:57:11,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:57:11,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:57:11,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:57:11,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:57:08" (1/3) ... [2021-12-17 23:57:11,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0b64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:57:11, skipping insertion in model container [2021-12-17 23:57:11,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:57:10" (2/3) ... [2021-12-17 23:57:11,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0b64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:57:11, skipping insertion in model container [2021-12-17 23:57:11,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:57:11" (3/3) ... [2021-12-17 23:57:11,639 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_ignore_case_harness.i [2021-12-17 23:57:11,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:57:11,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:57:11,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:57:11,690 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 23:57:11,691 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 23:57:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-17 23:57:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 23:57:11,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:11,712 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:11,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:11,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1731481966, now seen corresponding path program 1 times [2021-12-17 23:57:11,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:11,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235423156] [2021-12-17 23:57:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:11,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:57:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:57:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 23:57:12,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235423156] [2021-12-17 23:57:12,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235423156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:12,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:57:12,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:57:12,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603746299] [2021-12-17 23:57:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:12,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:57:12,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:12,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:57:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:57:12,478 INFO L87 Difference]: Start difference. First operand has 143 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 88 states have internal predecessors, (108), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:12,863 INFO L93 Difference]: Finished difference Result 284 states and 410 transitions. [2021-12-17 23:57:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:57:12,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-12-17 23:57:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:12,872 INFO L225 Difference]: With dead ends: 284 [2021-12-17 23:57:12,872 INFO L226 Difference]: Without dead ends: 140 [2021-12-17 23:57:12,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:57:12,878 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 219 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:12,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 209 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 23:57:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-17 23:57:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-12-17 23:57:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-17 23:57:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-12-17 23:57:12,914 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 113 [2021-12-17 23:57:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:12,914 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-12-17 23:57:12,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-12-17 23:57:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 23:57:12,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:12,918 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:12,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:57:12,918 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:12,919 INFO L85 PathProgramCache]: Analyzing trace with hash 57376236, now seen corresponding path program 1 times [2021-12-17 23:57:12,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:12,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678374013] [2021-12-17 23:57:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:12,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 23:57:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:57:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-17 23:57:13,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678374013] [2021-12-17 23:57:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678374013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888888261] [2021-12-17 23:57:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:13,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:13,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:13,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:57:13,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:57:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:57:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 23:57:13,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:13,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888888261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:13,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:13,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-17 23:57:13,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895394842] [2021-12-17 23:57:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:13,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:57:13,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:57:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:57:13,993 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 23:57:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:14,169 INFO L93 Difference]: Finished difference Result 272 states and 367 transitions. [2021-12-17 23:57:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:57:14,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-12-17 23:57:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:14,171 INFO L225 Difference]: With dead ends: 272 [2021-12-17 23:57:14,171 INFO L226 Difference]: Without dead ends: 141 [2021-12-17 23:57:14,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:57:14,173 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 196 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:14,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 415 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:57:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-17 23:57:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-17 23:57:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (47), 41 states have call predecessors, (47), 41 states have call successors, (47) [2021-12-17 23:57:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2021-12-17 23:57:14,184 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 113 [2021-12-17 23:57:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:14,184 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2021-12-17 23:57:14,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 23:57:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2021-12-17 23:57:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 23:57:14,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:14,190 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:14,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 23:57:14,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:14,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash -590863305, now seen corresponding path program 1 times [2021-12-17 23:57:14,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692606341] [2021-12-17 23:57:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:14,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 23:57:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-17 23:57:14,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692606341] [2021-12-17 23:57:14,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692606341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675075480] [2021-12-17 23:57:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:14,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:14,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:57:14,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:57:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:57:15,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 23:57:15,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675075480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:15,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-17 23:57:15,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899361968] [2021-12-17 23:57:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:57:15,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:57:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:57:15,423 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-17 23:57:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:15,619 INFO L93 Difference]: Finished difference Result 227 states and 311 transitions. [2021-12-17 23:57:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:57:15,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2021-12-17 23:57:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:15,621 INFO L225 Difference]: With dead ends: 227 [2021-12-17 23:57:15,621 INFO L226 Difference]: Without dead ends: 141 [2021-12-17 23:57:15,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:57:15,623 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 203 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:15,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 550 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 23:57:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-17 23:57:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-17 23:57:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 87 states have internal predecessors, (103), 42 states have call successors, (42), 12 states have call predecessors, (42), 13 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2021-12-17 23:57:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2021-12-17 23:57:15,634 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 119 [2021-12-17 23:57:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:15,635 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2021-12-17 23:57:15,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-17 23:57:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2021-12-17 23:57:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 23:57:15,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:15,637 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:15,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 23:57:15,851 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,SelfDestructingSolverStorable2 [2021-12-17 23:57:15,852 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1636756019, now seen corresponding path program 2 times [2021-12-17 23:57:15,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:15,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667573320] [2021-12-17 23:57:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:15,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:15,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:15,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:57:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 23:57:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-17 23:57:16,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667573320] [2021-12-17 23:57:16,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667573320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075923689] [2021-12-17 23:57:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:57:16,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:16,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:57:16,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:57:16,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 23:57:16,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:57:16,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 23:57:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 23:57:16,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:16,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075923689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:16,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:16,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-17 23:57:16,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575804960] [2021-12-17 23:57:16,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:16,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:57:16,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:57:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:57:16,760 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:57:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:16,832 INFO L93 Difference]: Finished difference Result 153 states and 209 transitions. [2021-12-17 23:57:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:57:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2021-12-17 23:57:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:16,836 INFO L225 Difference]: With dead ends: 153 [2021-12-17 23:57:16,836 INFO L226 Difference]: Without dead ends: 151 [2021-12-17 23:57:16,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:57:16,839 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:16,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1262 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:57:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-17 23:57:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-12-17 23:57:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 94 states have internal predecessors, (109), 43 states have call successors, (43), 13 states have call predecessors, (43), 15 states have return successors, (54), 42 states have call predecessors, (54), 42 states have call successors, (54) [2021-12-17 23:57:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2021-12-17 23:57:16,865 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 131 [2021-12-17 23:57:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:16,867 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2021-12-17 23:57:16,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:57:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2021-12-17 23:57:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 23:57:16,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:16,869 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:16,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:17,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:17,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:17,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1157375339, now seen corresponding path program 1 times [2021-12-17 23:57:17,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:17,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589316394] [2021-12-17 23:57:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:17,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:57:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 23:57:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-17 23:57:17,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589316394] [2021-12-17 23:57:17,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589316394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061615176] [2021-12-17 23:57:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:17,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:17,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:17,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:57:17,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:57:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:17,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:57:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-17 23:57:17,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:17,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061615176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:17,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:17,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-17 23:57:17,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803277888] [2021-12-17 23:57:17,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:17,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:57:17,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:57:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:57:17,982 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-17 23:57:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:18,168 INFO L93 Difference]: Finished difference Result 260 states and 358 transitions. [2021-12-17 23:57:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:57:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 135 [2021-12-17 23:57:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:18,170 INFO L225 Difference]: With dead ends: 260 [2021-12-17 23:57:18,170 INFO L226 Difference]: Without dead ends: 147 [2021-12-17 23:57:18,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:57:18,171 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 202 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:18,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 670 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:57:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-17 23:57:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-12-17 23:57:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 91 states have internal predecessors, (106), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-17 23:57:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2021-12-17 23:57:18,178 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 135 [2021-12-17 23:57:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:18,179 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2021-12-17 23:57:18,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-17 23:57:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2021-12-17 23:57:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 23:57:18,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:18,180 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:18,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:18,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:18,404 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash 707842976, now seen corresponding path program 1 times [2021-12-17 23:57:18,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:18,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128382872] [2021-12-17 23:57:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:18,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:57:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:57:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:57:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-17 23:57:18,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:18,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128382872] [2021-12-17 23:57:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128382872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:18,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:57:18,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 23:57:18,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831498377] [2021-12-17 23:57:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:18,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:57:18,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:57:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:57:18,835 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:57:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:19,248 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2021-12-17 23:57:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:57:19,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 141 [2021-12-17 23:57:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:19,250 INFO L225 Difference]: With dead ends: 314 [2021-12-17 23:57:19,250 INFO L226 Difference]: Without dead ends: 174 [2021-12-17 23:57:19,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:57:19,251 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 242 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:19,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 350 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 23:57:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-17 23:57:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-12-17 23:57:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.202127659574468) internal successors, (113), 96 states have internal predecessors, (113), 43 states have call successors, (43), 13 states have call predecessors, (43), 14 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-17 23:57:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2021-12-17 23:57:19,260 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 206 transitions. Word has length 141 [2021-12-17 23:57:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:19,260 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 206 transitions. [2021-12-17 23:57:19,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-17 23:57:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 206 transitions. [2021-12-17 23:57:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 23:57:19,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:19,262 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:19,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:57:19,262 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:19,262 INFO L85 PathProgramCache]: Analyzing trace with hash 966008414, now seen corresponding path program 1 times [2021-12-17 23:57:19,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:19,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956927957] [2021-12-17 23:57:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:19,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:19,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:57:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:57:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:57:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-17 23:57:20,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:20,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956927957] [2021-12-17 23:57:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956927957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:20,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251382024] [2021-12-17 23:57:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:20,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:20,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:20,174 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) [2021-12-17 23:57:20,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:57:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:20,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 23:57:20,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:20,747 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 13 treesize of output 9 [2021-12-17 23:57:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 23:57:21,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:21,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251382024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:21,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:21,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [21] total 32 [2021-12-17 23:57:21,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470586964] [2021-12-17 23:57:21,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:21,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 23:57:21,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 23:57:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-12-17 23:57:21,207 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-17 23:57:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:21,321 INFO L93 Difference]: Finished difference Result 320 states and 429 transitions. [2021-12-17 23:57:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 23:57:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 141 [2021-12-17 23:57:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:21,322 INFO L225 Difference]: With dead ends: 320 [2021-12-17 23:57:21,322 INFO L226 Difference]: Without dead ends: 171 [2021-12-17 23:57:21,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 23:57:21,324 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 28 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:21,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1188 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-12-17 23:57:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-17 23:57:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-17 23:57:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 114 states have internal predecessors, (136), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (50), 42 states have call predecessors, (50), 42 states have call successors, (50) [2021-12-17 23:57:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 229 transitions. [2021-12-17 23:57:21,332 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 229 transitions. Word has length 141 [2021-12-17 23:57:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:21,332 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 229 transitions. [2021-12-17 23:57:21,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-17 23:57:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 229 transitions. [2021-12-17 23:57:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 23:57:21,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:21,333 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:21,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:21,552 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1067385632, now seen corresponding path program 1 times [2021-12-17 23:57:21,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:21,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520213479] [2021-12-17 23:57:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:21,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:57:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 23:57:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:57:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:57:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 23:57:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-17 23:57:21,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520213479] [2021-12-17 23:57:21,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520213479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006821930] [2021-12-17 23:57:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:21,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:21,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:21,780 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) [2021-12-17 23:57:21,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:57:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:57:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-17 23:57:22,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:22,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006821930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:22,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:22,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-17 23:57:22,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089712932] [2021-12-17 23:57:22,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:22,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:57:22,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:22,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:57:22,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:57:22,336 INFO L87 Difference]: Start difference. First operand 171 states and 229 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:22,359 INFO L93 Difference]: Finished difference Result 329 states and 448 transitions. [2021-12-17 23:57:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:57:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 141 [2021-12-17 23:57:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:22,361 INFO L225 Difference]: With dead ends: 329 [2021-12-17 23:57:22,361 INFO L226 Difference]: Without dead ends: 180 [2021-12-17 23:57:22,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:57:22,363 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:22,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 541 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:57:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-17 23:57:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 163. [2021-12-17 23:57:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 106 states have internal predecessors, (127), 43 states have call successors, (43), 14 states have call predecessors, (43), 14 states have return successors, (49), 42 states have call predecessors, (49), 42 states have call successors, (49) [2021-12-17 23:57:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 219 transitions. [2021-12-17 23:57:22,372 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 219 transitions. Word has length 141 [2021-12-17 23:57:22,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:22,372 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 219 transitions. [2021-12-17 23:57:22,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 219 transitions. [2021-12-17 23:57:22,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 23:57:22,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:22,374 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:22,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:22,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:22,591 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash -707487644, now seen corresponding path program 2 times [2021-12-17 23:57:22,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:22,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726037566] [2021-12-17 23:57:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:22,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 23:57:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 23:57:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 23:57:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 23:57:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 23:57:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 23:57:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 23:57:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 23:57:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 23:57:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:57:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-17 23:57:22,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:22,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726037566] [2021-12-17 23:57:22,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726037566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:22,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264060901] [2021-12-17 23:57:22,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:57:22,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:22,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:22,933 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) [2021-12-17 23:57:22,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:57:23,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:57:23,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:57:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-17 23:57:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:24,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:24,105 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-17 23:57:24,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 47 [2021-12-17 23:57:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 82 proven. 20 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-17 23:57:25,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:57:25,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264060901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:25,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:57:25,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-12-17 23:57:25,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809989975] [2021-12-17 23:57:25,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:57:25,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 23:57:25,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 23:57:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 23:57:25,505 INFO L87 Difference]: Start difference. First operand 163 states and 219 transitions. Second operand has 27 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 10 states have call successors, (37), 7 states have call predecessors, (37), 8 states have return successors, (35), 8 states have call predecessors, (35), 10 states have call successors, (35) [2021-12-17 23:57:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:28,498 INFO L93 Difference]: Finished difference Result 452 states and 666 transitions. [2021-12-17 23:57:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 23:57:28,499 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 10 states have call successors, (37), 7 states have call predecessors, (37), 8 states have return successors, (35), 8 states have call predecessors, (35), 10 states have call successors, (35) Word has length 145 [2021-12-17 23:57:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:28,501 INFO L225 Difference]: With dead ends: 452 [2021-12-17 23:57:28,501 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 23:57:28,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 182 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=633, Invalid=4479, Unknown=0, NotChecked=0, Total=5112 [2021-12-17 23:57:28,503 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 388 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 3705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1058 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:28,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1794 Invalid, 3705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2452 Invalid, 0 Unknown, 1058 Unchecked, 1.6s Time] [2021-12-17 23:57:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 23:57:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 228. [2021-12-17 23:57:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 54 states have call successors, (54), 19 states have call predecessors, (54), 21 states have return successors, (85), 53 states have call predecessors, (85), 53 states have call successors, (85) [2021-12-17 23:57:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 321 transitions. [2021-12-17 23:57:28,521 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 321 transitions. Word has length 145 [2021-12-17 23:57:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:28,521 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 321 transitions. [2021-12-17 23:57:28,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 10 states have call successors, (37), 7 states have call predecessors, (37), 8 states have return successors, (35), 8 states have call predecessors, (35), 10 states have call successors, (35) [2021-12-17 23:57:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 321 transitions. [2021-12-17 23:57:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 23:57:28,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:28,523 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:28,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:28,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:28,736 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash -604392469, now seen corresponding path program 1 times [2021-12-17 23:57:28,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:28,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893076781] [2021-12-17 23:57:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:28,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:57:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:57:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:57:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-17 23:57:28,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:28,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893076781] [2021-12-17 23:57:28,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893076781] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:28,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556771458] [2021-12-17 23:57:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:28,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:28,961 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) [2021-12-17 23:57:28,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:57:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:57:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-17 23:57:29,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:29,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556771458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:29,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:29,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-17 23:57:29,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440271419] [2021-12-17 23:57:29,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:29,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:57:29,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:57:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:57:29,566 INFO L87 Difference]: Start difference. First operand 228 states and 321 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:29,600 INFO L93 Difference]: Finished difference Result 392 states and 558 transitions. [2021-12-17 23:57:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:57:29,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-17 23:57:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:29,602 INFO L225 Difference]: With dead ends: 392 [2021-12-17 23:57:29,602 INFO L226 Difference]: Without dead ends: 176 [2021-12-17 23:57:29,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:57:29,604 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 9 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:29,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 534 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:57:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-17 23:57:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 168. [2021-12-17 23:57:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 109 states have (on average 1.18348623853211) internal successors, (129), 111 states have internal predecessors, (129), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-17 23:57:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 228 transitions. [2021-12-17 23:57:29,613 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 228 transitions. Word has length 147 [2021-12-17 23:57:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:29,613 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 228 transitions. [2021-12-17 23:57:29,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 228 transitions. [2021-12-17 23:57:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 23:57:29,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:29,615 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:29,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:29,831 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,SelfDestructingSolverStorable9 [2021-12-17 23:57:29,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash -589889235, now seen corresponding path program 1 times [2021-12-17 23:57:29,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:29,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159280941] [2021-12-17 23:57:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:29,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:29,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:57:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:57:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:57:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-17 23:57:30,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159280941] [2021-12-17 23:57:30,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159280941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834342011] [2021-12-17 23:57:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:30,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:30,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:30,050 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) [2021-12-17 23:57:30,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 23:57:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:57:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 23:57:30,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:30,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834342011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:30,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:30,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-17 23:57:30,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696784092] [2021-12-17 23:57:30,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:30,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:57:30,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:30,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:57:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:57:30,614 INFO L87 Difference]: Start difference. First operand 168 states and 228 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:30,630 INFO L93 Difference]: Finished difference Result 333 states and 469 transitions. [2021-12-17 23:57:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:57:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-17 23:57:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:30,631 INFO L225 Difference]: With dead ends: 333 [2021-12-17 23:57:30,631 INFO L226 Difference]: Without dead ends: 177 [2021-12-17 23:57:30,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:57:30,632 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 34 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:30,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 532 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:57:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-17 23:57:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-12-17 23:57:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 105 states have (on average 1.161904761904762) internal successors, (122), 107 states have internal predecessors, (122), 43 states have call successors, (43), 14 states have call predecessors, (43), 15 states have return successors, (56), 42 states have call predecessors, (56), 42 states have call successors, (56) [2021-12-17 23:57:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 221 transitions. [2021-12-17 23:57:30,638 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 221 transitions. Word has length 147 [2021-12-17 23:57:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:30,638 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 221 transitions. [2021-12-17 23:57:30,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-17 23:57:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 221 transitions. [2021-12-17 23:57:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 23:57:30,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:30,640 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:30,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:30,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:30,843 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1628473809, now seen corresponding path program 1 times [2021-12-17 23:57:30,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:30,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733458405] [2021-12-17 23:57:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:30,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 23:57:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:57:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 23:57:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 23:57:31,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:31,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733458405] [2021-12-17 23:57:31,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733458405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:31,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682068054] [2021-12-17 23:57:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:31,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:31,491 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) [2021-12-17 23:57:31,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 23:57:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 23:57:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:31,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:57:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:32,301 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 22 treesize of output 23 [2021-12-17 23:57:32,303 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 24 treesize of output 16 [2021-12-17 23:57:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 118 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 23:57:32,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:57:33,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-17 23:57:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-17 23:57:33,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682068054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:57:33,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:57:33,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 37 [2021-12-17 23:57:33,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947526409] [2021-12-17 23:57:33,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:57:33,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 23:57:33,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:33,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 23:57:33,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 23:57:33,580 INFO L87 Difference]: Start difference. First operand 164 states and 221 transitions. Second operand has 37 states, 34 states have (on average 4.970588235294118) internal successors, (169), 33 states have internal predecessors, (169), 16 states have call successors, (51), 8 states have call predecessors, (51), 10 states have return successors, (49), 13 states have call predecessors, (49), 16 states have call successors, (49) [2021-12-17 23:57:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:42,157 INFO L93 Difference]: Finished difference Result 738 states and 1304 transitions. [2021-12-17 23:57:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-17 23:57:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 4.970588235294118) internal successors, (169), 33 states have internal predecessors, (169), 16 states have call successors, (51), 8 states have call predecessors, (51), 10 states have return successors, (49), 13 states have call predecessors, (49), 16 states have call successors, (49) Word has length 147 [2021-12-17 23:57:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:42,162 INFO L225 Difference]: With dead ends: 738 [2021-12-17 23:57:42,162 INFO L226 Difference]: Without dead ends: 635 [2021-12-17 23:57:42,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 344 SyntacticMatches, 11 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3603 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1171, Invalid=11711, Unknown=0, NotChecked=0, Total=12882 [2021-12-17 23:57:42,166 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 764 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 8547 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 11162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 8547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1538 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:42,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 2411 Invalid, 11162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 8547 Invalid, 0 Unknown, 1538 Unchecked, 5.9s Time] [2021-12-17 23:57:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-12-17 23:57:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 301. [2021-12-17 23:57:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 200 states have (on average 1.14) internal successors, (228), 206 states have internal predecessors, (228), 75 states have call successors, (75), 19 states have call predecessors, (75), 25 states have return successors, (148), 75 states have call predecessors, (148), 74 states have call successors, (148) [2021-12-17 23:57:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 451 transitions. [2021-12-17 23:57:42,190 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 451 transitions. Word has length 147 [2021-12-17 23:57:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:42,190 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 451 transitions. [2021-12-17 23:57:42,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 4.970588235294118) internal successors, (169), 33 states have internal predecessors, (169), 16 states have call successors, (51), 8 states have call predecessors, (51), 10 states have return successors, (49), 13 states have call predecessors, (49), 16 states have call successors, (49) [2021-12-17 23:57:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 451 transitions. [2021-12-17 23:57:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 23:57:42,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:42,192 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:42,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:42,407 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,SelfDestructingSolverStorable11 [2021-12-17 23:57:42,407 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash -230836741, now seen corresponding path program 2 times [2021-12-17 23:57:42,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916968775] [2021-12-17 23:57:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:42,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 23:57:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 23:57:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 23:57:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-17 23:57:42,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:42,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916968775] [2021-12-17 23:57:42,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916968775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:42,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445377403] [2021-12-17 23:57:42,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:57:42,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:42,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:42,694 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) [2021-12-17 23:57:42,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 23:57:43,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:57:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:57:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2864 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 23:57:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-17 23:57:43,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:57:43,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445377403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:57:43,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:57:43,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-17 23:57:43,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6191535] [2021-12-17 23:57:43,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:57:43,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:57:43,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:57:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:57:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 23:57:43,800 INFO L87 Difference]: Start difference. First operand 301 states and 451 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 23:57:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:57:43,894 INFO L93 Difference]: Finished difference Result 492 states and 729 transitions. [2021-12-17 23:57:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:57:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 151 [2021-12-17 23:57:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:57:43,896 INFO L225 Difference]: With dead ends: 492 [2021-12-17 23:57:43,896 INFO L226 Difference]: Without dead ends: 310 [2021-12-17 23:57:43,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:57:43,898 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 12 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:57:43,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1363 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:57:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-17 23:57:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 301. [2021-12-17 23:57:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 200 states have (on average 1.14) internal successors, (228), 206 states have internal predecessors, (228), 75 states have call successors, (75), 19 states have call predecessors, (75), 25 states have return successors, (139), 75 states have call predecessors, (139), 74 states have call successors, (139) [2021-12-17 23:57:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 442 transitions. [2021-12-17 23:57:43,911 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 442 transitions. Word has length 151 [2021-12-17 23:57:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:57:43,911 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 442 transitions. [2021-12-17 23:57:43,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 23:57:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 442 transitions. [2021-12-17 23:57:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-17 23:57:43,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:57:43,913 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:57:43,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 23:57:44,131 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,SelfDestructingSolverStorable12 [2021-12-17 23:57:44,131 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:57:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:57:44,132 INFO L85 PathProgramCache]: Analyzing trace with hash 126231492, now seen corresponding path program 1 times [2021-12-17 23:57:44,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:57:44,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319761973] [2021-12-17 23:57:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:44,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:57:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:57:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:57:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:57:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:57:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:57:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:57:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:57:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:57:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:57:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:57:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:57:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:57:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 23:57:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:57:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:57:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 23:57:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-17 23:57:44,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:57:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319761973] [2021-12-17 23:57:44,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319761973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:57:44,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399426639] [2021-12-17 23:57:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:57:44,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:57:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:57:44,703 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) [2021-12-17 23:57:44,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 23:57:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:57:45,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-17 23:57:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:57:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:45,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:45,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:57:45,647 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-17 23:57:45,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2021-12-17 23:57:45,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:57:45,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:57:45,784 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 18 treesize of output 10 [2021-12-17 23:57:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 102 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:57:47,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:58:00,074 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 7 treesize of output 3 [2021-12-17 23:58:00,077 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-17 23:58:00,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399426639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:00,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:58:00,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 44 [2021-12-17 23:58:00,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465158909] [2021-12-17 23:58:00,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:58:00,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 23:58:00,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 23:58:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3818, Unknown=7, NotChecked=0, Total=4032 [2021-12-17 23:58:00,141 INFO L87 Difference]: Start difference. First operand 301 states and 442 transitions. Second operand has 44 states, 40 states have (on average 4.625) internal successors, (185), 38 states have internal predecessors, (185), 14 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 12 states have call predecessors, (38), 14 states have call successors, (38) [2021-12-17 23:58:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:10,242 INFO L93 Difference]: Finished difference Result 1015 states and 1586 transitions. [2021-12-17 23:58:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-17 23:58:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 4.625) internal successors, (185), 38 states have internal predecessors, (185), 14 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 12 states have call predecessors, (38), 14 states have call successors, (38) Word has length 153 [2021-12-17 23:58:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:10,246 INFO L225 Difference]: With dead ends: 1015 [2021-12-17 23:58:10,246 INFO L226 Difference]: Without dead ends: 789 [2021-12-17 23:58:10,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 246 SyntacticMatches, 14 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1573, Invalid=16780, Unknown=7, NotChecked=0, Total=18360 [2021-12-17 23:58:10,252 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 418 mSDsluCounter, 4668 mSDsCounter, 0 mSdLazyCounter, 10115 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 5017 SdHoareTripleChecker+Invalid, 13723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 10115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3159 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:10,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 5017 Invalid, 13723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 10115 Invalid, 0 Unknown, 3159 Unchecked, 5.7s Time] [2021-12-17 23:58:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-12-17 23:58:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 587. [2021-12-17 23:58:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 405 states have (on average 1.1382716049382715) internal successors, (461), 419 states have internal predecessors, (461), 135 states have call successors, (135), 33 states have call predecessors, (135), 46 states have return successors, (253), 134 states have call predecessors, (253), 133 states have call successors, (253) [2021-12-17 23:58:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 849 transitions. [2021-12-17 23:58:10,282 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 849 transitions. Word has length 153 [2021-12-17 23:58:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:10,282 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 849 transitions. [2021-12-17 23:58:10,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 4.625) internal successors, (185), 38 states have internal predecessors, (185), 14 states have call successors, (39), 10 states have call predecessors, (39), 14 states have return successors, (38), 12 states have call predecessors, (38), 14 states have call successors, (38) [2021-12-17 23:58:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 849 transitions. [2021-12-17 23:58:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 23:58:10,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:10,285 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:10,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 23:58:10,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 23:58:10,499 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:10,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1721479034, now seen corresponding path program 1 times [2021-12-17 23:58:10,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:10,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257083766] [2021-12-17 23:58:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:10,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:58:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:58:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:58:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:58:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:58:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:58:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:58:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:58:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:58:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 23:58:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:58:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:58:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 23:58:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 23:58:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-17 23:58:10,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257083766] [2021-12-17 23:58:10,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257083766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548144409] [2021-12-17 23:58:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:10,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:10,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:58:10,988 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) [2021-12-17 23:58:10,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 23:58:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:11,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 23:58:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:58:11,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:58:11,811 INFO L354 Elim1Store]: treesize reduction 288, result has 17.5 percent of original size [2021-12-17 23:58:11,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 81 [2021-12-17 23:58:11,914 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 23:58:11,915 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 34 [2021-12-17 23:58:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 23:58:12,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:58:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-17 23:58:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548144409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:58:12,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:58:12,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 24 [2021-12-17 23:58:12,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104609239] [2021-12-17 23:58:12,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:58:12,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 23:58:12,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:12,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 23:58:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-12-17 23:58:12,528 INFO L87 Difference]: Start difference. First operand 587 states and 849 transitions. Second operand has 24 states, 23 states have (on average 6.173913043478261) internal successors, (142), 21 states have internal predecessors, (142), 11 states have call successors, (43), 8 states have call predecessors, (43), 7 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-17 23:58:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:13,969 INFO L93 Difference]: Finished difference Result 845 states and 1256 transitions. [2021-12-17 23:58:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 23:58:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.173913043478261) internal successors, (142), 21 states have internal predecessors, (142), 11 states have call successors, (43), 8 states have call predecessors, (43), 7 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) Word has length 160 [2021-12-17 23:58:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:13,973 INFO L225 Difference]: With dead ends: 845 [2021-12-17 23:58:13,973 INFO L226 Difference]: Without dead ends: 641 [2021-12-17 23:58:13,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 336 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 23:58:13,975 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 205 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:13,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1100 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1830 Invalid, 0 Unknown, 311 Unchecked, 1.1s Time] [2021-12-17 23:58:13,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-17 23:58:13,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 591. [2021-12-17 23:58:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 408 states have (on average 1.1372549019607843) internal successors, (464), 422 states have internal predecessors, (464), 135 states have call successors, (135), 34 states have call predecessors, (135), 47 states have return successors, (252), 134 states have call predecessors, (252), 133 states have call successors, (252) [2021-12-17 23:58:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 851 transitions. [2021-12-17 23:58:14,000 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 851 transitions. Word has length 160 [2021-12-17 23:58:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:14,000 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 851 transitions. [2021-12-17 23:58:14,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.173913043478261) internal successors, (142), 21 states have internal predecessors, (142), 11 states have call successors, (43), 8 states have call predecessors, (43), 7 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-17 23:58:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 851 transitions. [2021-12-17 23:58:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-17 23:58:14,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:14,003 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:14,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 23:58:14,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 23:58:14,209 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1902028973, now seen corresponding path program 1 times [2021-12-17 23:58:14,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:14,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950179194] [2021-12-17 23:58:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:14,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:58:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:58:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:58:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:58:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:58:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:58:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:58:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:58:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:58:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 23:58:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-17 23:58:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 23:58:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 23:58:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-17 23:58:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-17 23:58:14,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950179194] [2021-12-17 23:58:14,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950179194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:14,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008227463] [2021-12-17 23:58:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:14,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:14,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:58:14,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:58:14,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 23:58:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 2912 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 23:58:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:58:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 23:58:15,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:58:15,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008227463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:58:15,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:58:15,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-17 23:58:15,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754722087] [2021-12-17 23:58:15,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:58:15,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:58:15,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:58:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-17 23:58:15,159 INFO L87 Difference]: Start difference. First operand 591 states and 851 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-17 23:58:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:15,267 INFO L93 Difference]: Finished difference Result 1041 states and 1490 transitions. [2021-12-17 23:58:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:58:15,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 158 [2021-12-17 23:58:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:15,271 INFO L225 Difference]: With dead ends: 1041 [2021-12-17 23:58:15,271 INFO L226 Difference]: Without dead ends: 575 [2021-12-17 23:58:15,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:58:15,274 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 12 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:15,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1363 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:58:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-12-17 23:58:15,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 565. [2021-12-17 23:58:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 385 states have (on average 1.12987012987013) internal successors, (435), 398 states have internal predecessors, (435), 133 states have call successors, (133), 34 states have call predecessors, (133), 46 states have return successors, (244), 132 states have call predecessors, (244), 131 states have call successors, (244) [2021-12-17 23:58:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 812 transitions. [2021-12-17 23:58:15,304 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 812 transitions. Word has length 158 [2021-12-17 23:58:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:15,304 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 812 transitions. [2021-12-17 23:58:15,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-17 23:58:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 812 transitions. [2021-12-17 23:58:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 23:58:15,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:15,307 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:15,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 23:58:15,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:15,515 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:15,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2097533430, now seen corresponding path program 2 times [2021-12-17 23:58:15,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:15,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316111280] [2021-12-17 23:58:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:15,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:58:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:58:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:58:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:58:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:58:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:58:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:58:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:58:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:58:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:58:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 23:58:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:58:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 23:58:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:15,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 23:58:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-17 23:58:16,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:16,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316111280] [2021-12-17 23:58:16,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316111280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:58:16,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:58:16,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-17 23:58:16,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461561047] [2021-12-17 23:58:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:58:16,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 23:58:16,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 23:58:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-17 23:58:16,090 INFO L87 Difference]: Start difference. First operand 565 states and 812 transitions. Second operand has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-17 23:58:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:17,183 INFO L93 Difference]: Finished difference Result 996 states and 1457 transitions. [2021-12-17 23:58:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 23:58:17,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 160 [2021-12-17 23:58:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:17,187 INFO L225 Difference]: With dead ends: 996 [2021-12-17 23:58:17,188 INFO L226 Difference]: Without dead ends: 788 [2021-12-17 23:58:17,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-12-17 23:58:17,189 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 338 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:17,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 629 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 23:58:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-12-17 23:58:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 632. [2021-12-17 23:58:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 439 states have (on average 1.1366742596810935) internal successors, (499), 452 states have internal predecessors, (499), 144 states have call successors, (144), 36 states have call predecessors, (144), 48 states have return successors, (276), 143 states have call predecessors, (276), 142 states have call successors, (276) [2021-12-17 23:58:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 919 transitions. [2021-12-17 23:58:17,217 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 919 transitions. Word has length 160 [2021-12-17 23:58:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:17,218 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 919 transitions. [2021-12-17 23:58:17,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 11 states have internal predecessors, (72), 6 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-17 23:58:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 919 transitions. [2021-12-17 23:58:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-17 23:58:17,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:17,220 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:17,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 23:58:17,221 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:17,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1180334784, now seen corresponding path program 3 times [2021-12-17 23:58:17,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:17,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105727431] [2021-12-17 23:58:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:17,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:58:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:58:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:58:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:58:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:58:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:58:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:58:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:58:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:58:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:58:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:58:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 23:58:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 23:58:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-17 23:58:17,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105727431] [2021-12-17 23:58:17,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105727431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014306954] [2021-12-17 23:58:17,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:58:17,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:58:17,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:58:17,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 23:58:18,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 23:58:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:58:18,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2442 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 23:58:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:58:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-17 23:58:23,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:58:24,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014306954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:24,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:58:24,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2021-12-17 23:58:24,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608878131] [2021-12-17 23:58:24,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:58:24,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 23:58:24,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 23:58:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1201, Unknown=2, NotChecked=0, Total=1332 [2021-12-17 23:58:24,422 INFO L87 Difference]: Start difference. First operand 632 states and 919 transitions. Second operand has 30 states, 27 states have (on average 4.148148148148148) internal successors, (112), 26 states have internal predecessors, (112), 12 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (32), 9 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-17 23:58:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:30,399 INFO L93 Difference]: Finished difference Result 1199 states and 1682 transitions. [2021-12-17 23:58:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 23:58:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 4.148148148148148) internal successors, (112), 26 states have internal predecessors, (112), 12 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (32), 9 states have call predecessors, (32), 12 states have call successors, (32) Word has length 153 [2021-12-17 23:58:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:30,404 INFO L225 Difference]: With dead ends: 1199 [2021-12-17 23:58:30,404 INFO L226 Difference]: Without dead ends: 900 [2021-12-17 23:58:30,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=386, Invalid=2916, Unknown=4, NotChecked=0, Total=3306 [2021-12-17 23:58:30,406 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 255 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 888 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:30,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1084 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1485 Invalid, 0 Unknown, 888 Unchecked, 1.1s Time] [2021-12-17 23:58:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-12-17 23:58:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 745. [2021-12-17 23:58:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 515 states have (on average 1.1359223300970873) internal successors, (585), 526 states have internal predecessors, (585), 173 states have call successors, (173), 47 states have call predecessors, (173), 56 states have return successors, (332), 171 states have call predecessors, (332), 171 states have call successors, (332) [2021-12-17 23:58:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1090 transitions. [2021-12-17 23:58:30,440 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1090 transitions. Word has length 153 [2021-12-17 23:58:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:30,440 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1090 transitions. [2021-12-17 23:58:30,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 4.148148148148148) internal successors, (112), 26 states have internal predecessors, (112), 12 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (32), 9 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-17 23:58:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1090 transitions. [2021-12-17 23:58:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 23:58:30,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:30,443 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:30,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 23:58:30,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 23:58:30,663 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash 817669752, now seen corresponding path program 3 times [2021-12-17 23:58:30,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:30,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292941413] [2021-12-17 23:58:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:30,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:30,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:58:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:30,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:58:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:30,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:30,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:58:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:30,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:58:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:58:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:58:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:58:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:58:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:58:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:58:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 23:58:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:58:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 23:58:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 23:58:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 23:58:31,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:31,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292941413] [2021-12-17 23:58:31,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292941413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:31,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118827809] [2021-12-17 23:58:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:58:31,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:58:31,283 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:58:31,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 23:58:32,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 23:58:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:58:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 2822 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 23:58:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:58:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 120 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 23:58:33,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:58:33,935 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 26 treesize of output 14 [2021-12-17 23:58:33,970 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-17 23:58:33,971 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-17 23:58:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 23:58:34,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118827809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:58:34,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:58:34,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 29 [2021-12-17 23:58:34,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119421835] [2021-12-17 23:58:34,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:58:34,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 23:58:34,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 23:58:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-12-17 23:58:34,096 INFO L87 Difference]: Start difference. First operand 745 states and 1090 transitions. Second operand has 29 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 11 states have call successors, (46), 6 states have call predecessors, (46), 6 states have return successors, (42), 8 states have call predecessors, (42), 11 states have call successors, (42) [2021-12-17 23:58:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:37,426 INFO L93 Difference]: Finished difference Result 1493 states and 2207 transitions. [2021-12-17 23:58:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 23:58:37,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 11 states have call successors, (46), 6 states have call predecessors, (46), 6 states have return successors, (42), 8 states have call predecessors, (42), 11 states have call successors, (42) Word has length 160 [2021-12-17 23:58:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:37,433 INFO L225 Difference]: With dead ends: 1493 [2021-12-17 23:58:37,433 INFO L226 Difference]: Without dead ends: 1059 [2021-12-17 23:58:37,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 340 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=467, Invalid=3193, Unknown=0, NotChecked=0, Total=3660 [2021-12-17 23:58:37,435 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 344 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 3972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:37,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1414 Invalid, 3972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 2731 Invalid, 0 Unknown, 823 Unchecked, 2.1s Time] [2021-12-17 23:58:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-12-17 23:58:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 857. [2021-12-17 23:58:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 597 states have (on average 1.1323283082077051) internal successors, (676), 612 states have internal predecessors, (676), 185 states have call successors, (185), 61 states have call predecessors, (185), 74 states have return successors, (343), 183 states have call predecessors, (343), 183 states have call successors, (343) [2021-12-17 23:58:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1204 transitions. [2021-12-17 23:58:37,482 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1204 transitions. Word has length 160 [2021-12-17 23:58:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:37,483 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1204 transitions. [2021-12-17 23:58:37,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 5.538461538461538) internal successors, (144), 25 states have internal predecessors, (144), 11 states have call successors, (46), 6 states have call predecessors, (46), 6 states have return successors, (42), 8 states have call predecessors, (42), 11 states have call successors, (42) [2021-12-17 23:58:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1204 transitions. [2021-12-17 23:58:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-17 23:58:37,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:37,486 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:37,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 23:58:37,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:37,703 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash -814095240, now seen corresponding path program 1 times [2021-12-17 23:58:37,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860039838] [2021-12-17 23:58:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:37,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:37,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:58:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:37,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:37,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:58:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:37,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:58:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:58:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:58:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:58:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:58:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:58:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:58:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 23:58:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:58:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 23:58:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:58:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 23:58:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-17 23:58:38,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:38,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860039838] [2021-12-17 23:58:38,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860039838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:38,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969393188] [2021-12-17 23:58:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:38,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:58:38,307 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:58:38,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 23:58:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:38,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-17 23:58:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:58:38,797 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 8 [2021-12-17 23:58:38,949 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 13 treesize of output 9 [2021-12-17 23:58:39,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-17 23:58:39,649 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-12-17 23:58:39,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 48 [2021-12-17 23:58:39,710 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-17 23:58:39,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 11 [2021-12-17 23:58:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 23:58:39,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:58:39,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969393188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:58:39,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:58:39,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [18] total 36 [2021-12-17 23:58:39,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484952830] [2021-12-17 23:58:39,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:58:39,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 23:58:39,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:39,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 23:58:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 23:58:39,995 INFO L87 Difference]: Start difference. First operand 857 states and 1204 transitions. Second operand has 20 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-17 23:58:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:58:41,162 INFO L93 Difference]: Finished difference Result 1672 states and 2365 transitions. [2021-12-17 23:58:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 23:58:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 156 [2021-12-17 23:58:41,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:58:41,182 INFO L225 Difference]: With dead ends: 1672 [2021-12-17 23:58:41,182 INFO L226 Difference]: Without dead ends: 1087 [2021-12-17 23:58:41,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=2056, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 23:58:41,186 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 207 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 988 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:58:41,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 781 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1500 Invalid, 0 Unknown, 988 Unchecked, 0.9s Time] [2021-12-17 23:58:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-12-17 23:58:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 953. [2021-12-17 23:58:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 658 states have (on average 1.1337386018237081) internal successors, (746), 675 states have internal predecessors, (746), 210 states have call successors, (210), 69 states have call predecessors, (210), 84 states have return successors, (378), 208 states have call predecessors, (378), 208 states have call successors, (378) [2021-12-17 23:58:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1334 transitions. [2021-12-17 23:58:41,256 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1334 transitions. Word has length 156 [2021-12-17 23:58:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:58:41,256 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1334 transitions. [2021-12-17 23:58:41,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-17 23:58:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1334 transitions. [2021-12-17 23:58:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 23:58:41,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:58:41,261 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:58:41,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 23:58:41,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:41,471 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:58:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:58:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1970898036, now seen corresponding path program 4 times [2021-12-17 23:58:41,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:58:41,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818431601] [2021-12-17 23:58:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:58:41,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:58:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:58:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:41,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:41,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:58:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:41,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:41,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:58:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:58:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:58:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:58:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:58:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:58:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:58:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:58:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:58:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 23:58:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:58:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 23:58:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:58:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:58:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 23:58:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:58:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-17 23:58:42,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:58:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818431601] [2021-12-17 23:58:42,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818431601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:58:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816106021] [2021-12-17 23:58:42,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:58:42,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:58:42,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:58:42,680 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:58:42,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 23:58:43,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:58:43,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:58:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2914 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 23:58:43,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:58:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 120 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 23:58:54,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:58:54,740 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-17 23:58:54,740 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-17 23:58:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 23:58:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816106021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:58:54,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:58:54,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12, 9] total 43 [2021-12-17 23:58:54,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957394020] [2021-12-17 23:58:54,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:58:54,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 23:58:54,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:58:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 23:58:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1686, Unknown=1, NotChecked=0, Total=1806 [2021-12-17 23:58:54,850 INFO L87 Difference]: Start difference. First operand 953 states and 1334 transitions. Second operand has 43 states, 38 states have (on average 4.631578947368421) internal successors, (176), 37 states have internal predecessors, (176), 17 states have call successors, (57), 6 states have call predecessors, (57), 11 states have return successors, (56), 16 states have call predecessors, (56), 17 states have call successors, (56) [2021-12-17 23:59:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:12,248 INFO L93 Difference]: Finished difference Result 1998 states and 2872 transitions. [2021-12-17 23:59:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 23:59:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 4.631578947368421) internal successors, (176), 37 states have internal predecessors, (176), 17 states have call successors, (57), 6 states have call predecessors, (57), 11 states have return successors, (56), 16 states have call predecessors, (56), 17 states have call successors, (56) Word has length 160 [2021-12-17 23:59:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:12,254 INFO L225 Difference]: With dead ends: 1998 [2021-12-17 23:59:12,254 INFO L226 Difference]: Without dead ends: 1601 [2021-12-17 23:59:12,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 350 SyntacticMatches, 10 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=860, Invalid=9035, Unknown=5, NotChecked=0, Total=9900 [2021-12-17 23:59:12,257 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 606 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 7816 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 9955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 7816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1412 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:12,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 1922 Invalid, 9955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 7816 Invalid, 0 Unknown, 1412 Unchecked, 6.3s Time] [2021-12-17 23:59:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-12-17 23:59:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1395. [2021-12-17 23:59:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 979 states have (on average 1.128702757916241) internal successors, (1105), 1002 states have internal predecessors, (1105), 283 states have call successors, (283), 111 states have call predecessors, (283), 132 states have return successors, (514), 281 states have call predecessors, (514), 281 states have call successors, (514) [2021-12-17 23:59:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1902 transitions. [2021-12-17 23:59:12,332 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1902 transitions. Word has length 160 [2021-12-17 23:59:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:12,333 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 1902 transitions. [2021-12-17 23:59:12,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 4.631578947368421) internal successors, (176), 37 states have internal predecessors, (176), 17 states have call successors, (57), 6 states have call predecessors, (57), 11 states have return successors, (56), 16 states have call predecessors, (56), 17 states have call successors, (56) [2021-12-17 23:59:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1902 transitions. [2021-12-17 23:59:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-17 23:59:12,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:12,337 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:12,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:12,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:12,547 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 706910291, now seen corresponding path program 1 times [2021-12-17 23:59:12,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:12,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599256708] [2021-12-17 23:59:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:12,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:59:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:59:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:59:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:59:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:59:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:59:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:59:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:59:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:59:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 23:59:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:59:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 23:59:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 23:59:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 23:59:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-17 23:59:13,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599256708] [2021-12-17 23:59:13,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599256708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918034942] [2021-12-17 23:59:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:13,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:13,295 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:13,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 23:59:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 23:59:13,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:13,779 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 8 [2021-12-17 23:59:13,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:59:14,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-17 23:59:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 72 proven. 38 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-17 23:59:14,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:59:15,328 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3262 (Array Int Int))) (not (= 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#rhs~0#1.base| v_ArrVal_3262) |c_ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.offset| 16)) 18446744073709551616)))) is different from false [2021-12-17 23:59:15,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918034942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:15,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:59:15,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2021-12-17 23:59:15,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465706191] [2021-12-17 23:59:15,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:59:15,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 23:59:15,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:15,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 23:59:15,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1154, Unknown=1, NotChecked=68, Total=1332 [2021-12-17 23:59:15,334 INFO L87 Difference]: Start difference. First operand 1395 states and 1902 transitions. Second operand has 30 states, 29 states have (on average 5.0) internal successors, (145), 26 states have internal predecessors, (145), 12 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (35), 12 states have call predecessors, (35), 12 states have call successors, (35) [2021-12-17 23:59:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:17,922 INFO L93 Difference]: Finished difference Result 1746 states and 2379 transitions. [2021-12-17 23:59:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 23:59:17,924 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.0) internal successors, (145), 26 states have internal predecessors, (145), 12 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (35), 12 states have call predecessors, (35), 12 states have call successors, (35) Word has length 155 [2021-12-17 23:59:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:17,944 INFO L225 Difference]: With dead ends: 1746 [2021-12-17 23:59:17,944 INFO L226 Difference]: Without dead ends: 1492 [2021-12-17 23:59:17,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 260 SyntacticMatches, 16 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=501, Invalid=3792, Unknown=1, NotChecked=128, Total=4422 [2021-12-17 23:59:17,947 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 541 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 3282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 630 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:17,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1531 Invalid, 3282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 2332 Invalid, 0 Unknown, 630 Unchecked, 1.4s Time] [2021-12-17 23:59:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-12-17 23:59:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1445. [2021-12-17 23:59:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1019 states have (on average 1.126594700686948) internal successors, (1148), 1043 states have internal predecessors, (1148), 286 states have call successors, (286), 117 states have call predecessors, (286), 139 states have return successors, (518), 284 states have call predecessors, (518), 284 states have call successors, (518) [2021-12-17 23:59:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 1952 transitions. [2021-12-17 23:59:18,010 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 1952 transitions. Word has length 155 [2021-12-17 23:59:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:18,011 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 1952 transitions. [2021-12-17 23:59:18,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.0) internal successors, (145), 26 states have internal predecessors, (145), 12 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (35), 12 states have call predecessors, (35), 12 states have call successors, (35) [2021-12-17 23:59:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 1952 transitions. [2021-12-17 23:59:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-17 23:59:18,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:18,014 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:18,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:18,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:18,235 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1385796688, now seen corresponding path program 2 times [2021-12-17 23:59:18,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:18,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175444009] [2021-12-17 23:59:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:18,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:59:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:59:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:59:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:59:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:59:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:59:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:59:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:59:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 23:59:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 23:59:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 23:59:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 23:59:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 23:59:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-17 23:59:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-17 23:59:19,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175444009] [2021-12-17 23:59:19,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175444009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233401894] [2021-12-17 23:59:19,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:59:19,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:19,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:19,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 23:59:19,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:59:19,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:59:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 23:59:19,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 118 proven. 14 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-17 23:59:21,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:59:21,532 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-17 23:59:21,532 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-17 23:59:21,539 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-17 23:59:21,540 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-17 23:59:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 23:59:21,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233401894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:59:21,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:59:21,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 11] total 40 [2021-12-17 23:59:21,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655517562] [2021-12-17 23:59:21,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:59:21,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 23:59:21,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 23:59:21,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 23:59:21,655 INFO L87 Difference]: Start difference. First operand 1445 states and 1952 transitions. Second operand has 40 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 13 states have call successors, (55), 6 states have call predecessors, (55), 9 states have return successors, (54), 11 states have call predecessors, (54), 13 states have call successors, (54) [2021-12-17 23:59:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:27,204 INFO L93 Difference]: Finished difference Result 2336 states and 3240 transitions. [2021-12-17 23:59:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 23:59:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 13 states have call successors, (55), 6 states have call predecessors, (55), 9 states have return successors, (54), 11 states have call predecessors, (54), 13 states have call successors, (54) Word has length 156 [2021-12-17 23:59:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:27,210 INFO L225 Difference]: With dead ends: 2336 [2021-12-17 23:59:27,210 INFO L226 Difference]: Without dead ends: 1438 [2021-12-17 23:59:27,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 329 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=706, Invalid=5456, Unknown=0, NotChecked=0, Total=6162 [2021-12-17 23:59:27,216 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 511 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 5831 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 7568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 5831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1095 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:27,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1483 Invalid, 7568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 5831 Invalid, 0 Unknown, 1095 Unchecked, 3.9s Time] [2021-12-17 23:59:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-12-17 23:59:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1229. [2021-12-17 23:59:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 871 states have (on average 1.1205510907003444) internal successors, (976), 892 states have internal predecessors, (976), 231 states have call successors, (231), 107 states have call predecessors, (231), 126 states have return successors, (393), 229 states have call predecessors, (393), 229 states have call successors, (393) [2021-12-17 23:59:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1600 transitions. [2021-12-17 23:59:27,277 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1600 transitions. Word has length 156 [2021-12-17 23:59:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:27,277 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 1600 transitions. [2021-12-17 23:59:27,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 13 states have call successors, (55), 6 states have call predecessors, (55), 9 states have return successors, (54), 11 states have call predecessors, (54), 13 states have call successors, (54) [2021-12-17 23:59:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1600 transitions. [2021-12-17 23:59:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 23:59:27,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:27,280 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:27,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 23:59:27,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 23:59:27,495 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2045633680, now seen corresponding path program 1 times [2021-12-17 23:59:27,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:27,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358540076] [2021-12-17 23:59:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:27,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:59:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:59:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:59:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:59:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:59:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:59:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:27,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:59:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 23:59:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 23:59:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-17 23:59:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 23:59:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 23:59:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 23:59:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 23:59:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-17 23:59:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-17 23:59:28,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:28,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358540076] [2021-12-17 23:59:28,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358540076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:28,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842251079] [2021-12-17 23:59:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:28,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:28,359 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:28,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 23:59:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 23:59:28,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:28,865 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 8 [2021-12-17 23:59:28,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:59:29,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-17 23:59:29,306 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 23:59:29,306 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-12-17 23:59:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 135 proven. 4 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 23:59:29,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:59:29,765 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3694 (Array Int Int))) (= 0 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#rhs~0#1.base| v_ArrVal_3694) |c_ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_ignore_case_harness_~#lhs~0#1.offset|) 18446744073709551616))) is different from false [2021-12-17 23:59:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842251079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:29,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:59:29,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-12-17 23:59:29,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422784380] [2021-12-17 23:59:29,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:59:29,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-17 23:59:29,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:59:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-17 23:59:29,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1429, Unknown=1, NotChecked=76, Total=1640 [2021-12-17 23:59:29,772 INFO L87 Difference]: Start difference. First operand 1229 states and 1600 transitions. Second operand has 38 states, 33 states have (on average 4.151515151515151) internal successors, (137), 32 states have internal predecessors, (137), 17 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 16 states have call predecessors, (42), 17 states have call successors, (42) [2021-12-17 23:59:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:59:34,799 INFO L93 Difference]: Finished difference Result 2195 states and 3251 transitions. [2021-12-17 23:59:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 23:59:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 4.151515151515151) internal successors, (137), 32 states have internal predecessors, (137), 17 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 16 states have call predecessors, (42), 17 states have call successors, (42) Word has length 163 [2021-12-17 23:59:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:59:34,806 INFO L225 Difference]: With dead ends: 2195 [2021-12-17 23:59:34,806 INFO L226 Difference]: Without dead ends: 1702 [2021-12-17 23:59:34,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 290 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=459, Invalid=4514, Unknown=1, NotChecked=138, Total=5112 [2021-12-17 23:59:34,808 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 431 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 6377 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 7415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 6377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 23:59:34,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 1684 Invalid, 7415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 6377 Invalid, 0 Unknown, 422 Unchecked, 3.9s Time] [2021-12-17 23:59:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-12-17 23:59:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1312. [2021-12-17 23:59:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 923 states have (on average 1.1224268689057422) internal successors, (1036), 947 states have internal predecessors, (1036), 260 states have call successors, (260), 106 states have call predecessors, (260), 128 states have return successors, (454), 258 states have call predecessors, (454), 258 states have call successors, (454) [2021-12-17 23:59:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1750 transitions. [2021-12-17 23:59:34,879 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1750 transitions. Word has length 163 [2021-12-17 23:59:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:59:34,880 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1750 transitions. [2021-12-17 23:59:34,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 4.151515151515151) internal successors, (137), 32 states have internal predecessors, (137), 17 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 16 states have call predecessors, (42), 17 states have call successors, (42) [2021-12-17 23:59:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1750 transitions. [2021-12-17 23:59:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-17 23:59:34,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:59:34,883 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:59:34,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-17 23:59:35,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-17 23:59:35,099 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:59:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:59:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1883827350, now seen corresponding path program 1 times [2021-12-17 23:59:35,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:59:35,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281518561] [2021-12-17 23:59:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:35,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:59:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:59:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 23:59:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 23:59:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 23:59:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 23:59:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 23:59:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 23:59:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 23:59:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 23:59:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 23:59:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 23:59:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 23:59:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 23:59:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 23:59:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:59:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 23:59:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-17 23:59:35,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:59:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281518561] [2021-12-17 23:59:35,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281518561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:59:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8251008] [2021-12-17 23:59:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:59:35,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:59:35,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:59:35,478 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:59:35,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 23:59:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:59:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-17 23:59:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:59:36,048 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 8 [2021-12-17 23:59:36,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:59:36,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:36,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:36,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:36,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:36,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:59:36,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 53 [2021-12-17 23:59:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 97 proven. 39 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 23:59:44,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:00:04,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8251008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:00:04,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:00:04,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 31 [2021-12-18 00:00:04,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440070461] [2021-12-18 00:00:04,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:00:04,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 00:00:04,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:00:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 00:00:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1461, Unknown=7, NotChecked=0, Total=1640 [2021-12-18 00:00:04,895 INFO L87 Difference]: Start difference. First operand 1312 states and 1750 transitions. Second operand has 31 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 13 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 10 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-18 00:00:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:06,724 INFO L93 Difference]: Finished difference Result 1812 states and 2513 transitions. [2021-12-18 00:00:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 00:00:06,725 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 13 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 10 states have call predecessors, (37), 12 states have call successors, (37) Word has length 161 [2021-12-18 00:00:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:06,733 INFO L225 Difference]: With dead ends: 1812 [2021-12-18 00:00:06,733 INFO L226 Difference]: Without dead ends: 1466 [2021-12-18 00:00:06,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 264 SyntacticMatches, 15 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=450, Invalid=3325, Unknown=7, NotChecked=0, Total=3782 [2021-12-18 00:00:06,736 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 381 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 889 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:06,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1081 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1137 Invalid, 0 Unknown, 889 Unchecked, 0.9s Time] [2021-12-18 00:00:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-12-18 00:00:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1327. [2021-12-18 00:00:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 934 states have (on average 1.119914346895075) internal successors, (1046), 961 states have internal predecessors, (1046), 261 states have call successors, (261), 106 states have call predecessors, (261), 131 states have return successors, (489), 259 states have call predecessors, (489), 259 states have call successors, (489) [2021-12-18 00:00:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1796 transitions. [2021-12-18 00:00:06,860 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1796 transitions. Word has length 161 [2021-12-18 00:00:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:06,860 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 1796 transitions. [2021-12-18 00:00:06,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 13 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 10 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-18 00:00:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1796 transitions. [2021-12-18 00:00:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-18 00:00:06,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:06,864 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:06,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:07,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:00:07,087 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1625661912, now seen corresponding path program 1 times [2021-12-18 00:00:07,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:00:07,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383447935] [2021-12-18 00:00:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:07,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:00:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:00:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:00:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:00:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:00:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:00:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:00:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:00:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:00:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:00:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:00:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:00:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:00:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:00:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:00:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-18 00:00:07,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:00:07,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383447935] [2021-12-18 00:00:07,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383447935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:07,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:07,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 00:00:07,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063676566] [2021-12-18 00:00:07,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:07,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:00:07,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:00:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:00:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:00:07,420 INFO L87 Difference]: Start difference. First operand 1327 states and 1796 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-18 00:00:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:08,139 INFO L93 Difference]: Finished difference Result 2011 states and 2773 transitions. [2021-12-18 00:00:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:00:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 161 [2021-12-18 00:00:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:08,153 INFO L225 Difference]: With dead ends: 2011 [2021-12-18 00:00:08,153 INFO L226 Difference]: Without dead ends: 1296 [2021-12-18 00:00:08,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:00:08,157 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 255 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:08,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 412 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 00:00:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-12-18 00:00:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1283. [2021-12-18 00:00:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 894 states have (on average 1.1152125279642058) internal successors, (997), 918 states have internal predecessors, (997), 261 states have call successors, (261), 105 states have call predecessors, (261), 127 states have return successors, (449), 259 states have call predecessors, (449), 259 states have call successors, (449) [2021-12-18 00:00:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1707 transitions. [2021-12-18 00:00:08,309 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1707 transitions. Word has length 161 [2021-12-18 00:00:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:08,309 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1707 transitions. [2021-12-18 00:00:08,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-18 00:00:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1707 transitions. [2021-12-18 00:00:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-18 00:00:08,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:08,313 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:08,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-18 00:00:08,314 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash -149722900, now seen corresponding path program 1 times [2021-12-18 00:00:08,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:00:08,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501154712] [2021-12-18 00:00:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:08,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:00:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:00:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:00:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:00:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:00:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:00:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:00:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:00:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:00:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:00:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:00:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:00:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:00:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:00:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:00:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-18 00:00:08,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:00:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501154712] [2021-12-18 00:00:08,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501154712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:00:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155047238] [2021-12-18 00:00:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:08,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:00:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:00:08,902 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:00:08,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 00:00:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:09,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 00:00:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:09,560 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 8 [2021-12-18 00:00:09,979 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-12-18 00:00:09,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 47 [2021-12-18 00:00:10,912 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-18 00:00:10,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 23 [2021-12-18 00:00:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 134 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-18 00:00:10,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:00:28,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155047238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:00:28,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:00:28,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-12-18 00:00:28,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566907219] [2021-12-18 00:00:28,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:00:28,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 00:00:28,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:00:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 00:00:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1001, Unknown=5, NotChecked=0, Total=1122 [2021-12-18 00:00:28,886 INFO L87 Difference]: Start difference. First operand 1283 states and 1707 transitions. Second operand has 28 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 11 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 8 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-18 00:00:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:32,146 INFO L93 Difference]: Finished difference Result 1959 states and 2638 transitions. [2021-12-18 00:00:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 00:00:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 11 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 8 states have call predecessors, (35), 11 states have call successors, (35) Word has length 161 [2021-12-18 00:00:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:32,152 INFO L225 Difference]: With dead ends: 1959 [2021-12-18 00:00:32,152 INFO L226 Difference]: Without dead ends: 1497 [2021-12-18 00:00:32,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 281 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=272, Invalid=2172, Unknown=6, NotChecked=0, Total=2450 [2021-12-18 00:00:32,154 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 216 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:32,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 1370 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2159 Invalid, 0 Unknown, 354 Unchecked, 1.4s Time] [2021-12-18 00:00:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-12-18 00:00:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1316. [2021-12-18 00:00:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 938 states have (on average 1.1140724946695095) internal successors, (1045), 961 states have internal predecessors, (1045), 248 states have call successors, (248), 108 states have call predecessors, (248), 129 states have return successors, (406), 246 states have call predecessors, (406), 246 states have call successors, (406) [2021-12-18 00:00:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1699 transitions. [2021-12-18 00:00:32,219 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1699 transitions. Word has length 161 [2021-12-18 00:00:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:32,219 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 1699 transitions. [2021-12-18 00:00:32,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 11 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (35), 8 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-18 00:00:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1699 transitions. [2021-12-18 00:00:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-18 00:00:32,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:32,222 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:32,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:32,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:00:32,435 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:32,436 INFO L85 PathProgramCache]: Analyzing trace with hash -786036442, now seen corresponding path program 1 times [2021-12-18 00:00:32,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:00:32,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646271869] [2021-12-18 00:00:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:32,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:00:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:00:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:00:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:00:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:00:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:00:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:00:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:00:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:00:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:00:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:00:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:00:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:00:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:00:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:00:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 00:00:32,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:00:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646271869] [2021-12-18 00:00:32,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646271869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:00:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717651311] [2021-12-18 00:00:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:32,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:00:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:00:32,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:00:32,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 00:00:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2895 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 00:00:33,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:33,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:00:33,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:33,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:33,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:33,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:33,686 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 00:00:33,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 53 [2021-12-18 00:00:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 140 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:00:34,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:00:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-18 00:00:35,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717651311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:00:35,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:00:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 12] total 29 [2021-12-18 00:00:35,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151943672] [2021-12-18 00:00:35,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:00:35,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 00:00:35,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:00:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 00:00:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:00:35,037 INFO L87 Difference]: Start difference. First operand 1316 states and 1699 transitions. Second operand has 29 states, 28 states have (on average 6.428571428571429) internal successors, (180), 26 states have internal predecessors, (180), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 10 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-18 00:00:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:38,030 INFO L93 Difference]: Finished difference Result 2005 states and 2614 transitions. [2021-12-18 00:00:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 00:00:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.428571428571429) internal successors, (180), 26 states have internal predecessors, (180), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 10 states have call predecessors, (39), 11 states have call successors, (39) Word has length 161 [2021-12-18 00:00:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:38,036 INFO L225 Difference]: With dead ends: 2005 [2021-12-18 00:00:38,036 INFO L226 Difference]: Without dead ends: 1528 [2021-12-18 00:00:38,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 335 SyntacticMatches, 20 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=344, Invalid=2106, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 00:00:38,038 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 386 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 4647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1337 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:38,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1259 Invalid, 4647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 3081 Invalid, 0 Unknown, 1337 Unchecked, 2.1s Time] [2021-12-18 00:00:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-12-18 00:00:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1361. [2021-12-18 00:00:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 977 states have (on average 1.1095189355168884) internal successors, (1084), 1003 states have internal predecessors, (1084), 250 states have call successors, (250), 109 states have call predecessors, (250), 133 states have return successors, (396), 248 states have call predecessors, (396), 248 states have call successors, (396) [2021-12-18 00:00:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1730 transitions. [2021-12-18 00:00:38,118 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1730 transitions. Word has length 161 [2021-12-18 00:00:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:38,119 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 1730 transitions. [2021-12-18 00:00:38,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.428571428571429) internal successors, (180), 26 states have internal predecessors, (180), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 10 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-18 00:00:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1730 transitions. [2021-12-18 00:00:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 00:00:38,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:38,122 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:38,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 00:00:38,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 00:00:38,346 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1118095855, now seen corresponding path program 1 times [2021-12-18 00:00:38,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:00:38,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80949493] [2021-12-18 00:00:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:38,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:00:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:00:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:00:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:00:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:00:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:00:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:00:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:00:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:00:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:00:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:00:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:00:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:00:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:00:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:00:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-12-18 00:00:38,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:00:38,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80949493] [2021-12-18 00:00:38,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80949493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:00:38,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:00:38,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 00:00:38,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211536980] [2021-12-18 00:00:38,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:00:38,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 00:00:38,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:00:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 00:00:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:00:38,730 INFO L87 Difference]: Start difference. First operand 1361 states and 1730 transitions. Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-18 00:00:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:00:39,553 INFO L93 Difference]: Finished difference Result 1410 states and 1790 transitions. [2021-12-18 00:00:39,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 00:00:39,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 163 [2021-12-18 00:00:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:00:39,567 INFO L225 Difference]: With dead ends: 1410 [2021-12-18 00:00:39,567 INFO L226 Difference]: Without dead ends: 1408 [2021-12-18 00:00:39,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-18 00:00:39,569 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 176 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:00:39,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1006 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 00:00:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-12-18 00:00:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1376. [2021-12-18 00:00:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 985 states have (on average 1.1086294416243654) internal successors, (1092), 1012 states have internal predecessors, (1092), 255 states have call successors, (255), 110 states have call predecessors, (255), 135 states have return successors, (403), 253 states have call predecessors, (403), 253 states have call successors, (403) [2021-12-18 00:00:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1750 transitions. [2021-12-18 00:00:39,655 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1750 transitions. Word has length 163 [2021-12-18 00:00:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:00:39,656 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 1750 transitions. [2021-12-18 00:00:39,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 8 states have internal predecessors, (59), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-18 00:00:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1750 transitions. [2021-12-18 00:00:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 00:00:39,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:00:39,659 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:00:39,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-18 00:00:39,659 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:00:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:00:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1819160433, now seen corresponding path program 1 times [2021-12-18 00:00:39,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:00:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082322765] [2021-12-18 00:00:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:39,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:00:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:00:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:00:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:00:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:00:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:00:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:00:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:00:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:00:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:00:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:00:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:00:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:00:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:00:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:00:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:00:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:00:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 48 proven. 23 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-18 00:00:40,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:00:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082322765] [2021-12-18 00:00:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082322765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:00:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415185833] [2021-12-18 00:00:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:00:40,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:00:40,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:00:40,175 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:00:40,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 00:00:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:00:40,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 2897 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-18 00:00:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:00:40,822 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 8 [2021-12-18 00:00:40,951 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 13 treesize of output 9 [2021-12-18 00:00:41,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-12-18 00:00:41,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:00:41,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-12-18 00:00:43,178 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_72| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_72|) 8))) (and (not (= 0 .cse0)) (= (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base|) 8) .cse0) (not (= |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_72|))))) is different from true [2021-12-18 00:00:44,691 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_73| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_73|) 8))) (and (not (= |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_73|)) (= (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base|) 8) .cse0) (not (= 0 .cse0))))) is different from true [2021-12-18 00:00:45,978 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_74| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_74|) 8))) (and (not (= 0 .cse0)) (= (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base|) 8) .cse0) (not (= |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_74|))))) is different from true [2021-12-18 00:00:47,177 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_75| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_75|) 8))) (and (not (= |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_75|)) (not (= 0 .cse0)) (= (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base|) 8) .cse0)))) is different from true [2021-12-18 00:00:48,219 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_76| Int) (|ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_76|) 8))) (and (= (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base|) 8) .cse0) (not (= |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_76|)) (not (= 0 .cse0))))) is different from true [2021-12-18 00:00:49,366 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_77| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_77|) 8))) (and (not (= 0 .cse0)) (not (= |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_77|)) (= (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base|) 8) .cse0)))) is different from true [2021-12-18 00:01:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 122 not checked. [2021-12-18 00:01:03,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:01:03,968 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-12-18 00:01:03,968 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2021-12-18 00:01:04,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415185833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:01:04,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:01:04,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 37] total 47 [2021-12-18 00:01:04,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347987794] [2021-12-18 00:01:04,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:01:04,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 00:01:04,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:01:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 00:01:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2680, Unknown=24, NotChecked=654, Total=3540 [2021-12-18 00:01:04,086 INFO L87 Difference]: Start difference. First operand 1376 states and 1750 transitions. Second operand has 47 states, 43 states have (on average 4.232558139534884) internal successors, (182), 39 states have internal predecessors, (182), 14 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (37), 13 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-18 00:01:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:01:51,098 INFO L93 Difference]: Finished difference Result 1836 states and 2391 transitions. [2021-12-18 00:01:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 00:01:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 4.232558139534884) internal successors, (182), 39 states have internal predecessors, (182), 14 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (37), 13 states have call predecessors, (37), 12 states have call successors, (37) Word has length 163 [2021-12-18 00:01:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:01:51,103 INFO L225 Difference]: With dead ends: 1836 [2021-12-18 00:01:51,104 INFO L226 Difference]: Without dead ends: 1481 [2021-12-18 00:01:51,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 257 SyntacticMatches, 13 SemanticMatches, 89 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=433, Invalid=6693, Unknown=38, NotChecked=1026, Total=8190 [2021-12-18 00:01:51,105 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 246 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 8510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5272 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:01:51,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 3223 Invalid, 8510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 2977 Invalid, 0 Unknown, 5272 Unchecked, 2.0s Time] [2021-12-18 00:01:51,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-12-18 00:01:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1376. [2021-12-18 00:01:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 986 states have (on average 1.1085192697768762) internal successors, (1093), 1013 states have internal predecessors, (1093), 254 states have call successors, (254), 110 states have call predecessors, (254), 135 states have return successors, (391), 252 states have call predecessors, (391), 252 states have call successors, (391) [2021-12-18 00:01:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1738 transitions. [2021-12-18 00:01:51,178 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1738 transitions. Word has length 163 [2021-12-18 00:01:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:01:51,178 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 1738 transitions. [2021-12-18 00:01:51,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 4.232558139534884) internal successors, (182), 39 states have internal predecessors, (182), 14 states have call successors, (39), 14 states have call predecessors, (39), 15 states have return successors, (37), 13 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-18 00:01:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1738 transitions. [2021-12-18 00:01:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-18 00:01:51,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:01:51,182 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:01:51,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 00:01:51,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:01:51,400 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:01:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:01:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash 741410002, now seen corresponding path program 1 times [2021-12-18 00:01:51,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:01:51,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886891391] [2021-12-18 00:01:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:01:51,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:01:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:01:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:01:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:01:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:01:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:01:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:01:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:01:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:01:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:01:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:01:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:01:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:01:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:01:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:01:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:01:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:01:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:01:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:01:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:01:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:01:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:01:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 38 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-18 00:01:51,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:01:51,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886891391] [2021-12-18 00:01:51,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886891391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:01:51,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164429099] [2021-12-18 00:01:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:01:51,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:01:51,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:01:51,945 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:01:51,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 00:01:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:01:52,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 2966 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-18 00:01:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:01:52,596 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 00:01:52,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 00:01:53,002 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 13 treesize of output 9 [2021-12-18 00:01:53,074 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-12-18 00:01:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 48 [2021-12-18 00:01:57,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-12-18 00:01:57,169 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:01:57,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2021-12-18 00:01:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:01:57,329 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4709 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_4709))) is different from true [2021-12-18 00:01:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-18 00:01:57,384 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4710 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_4710))) is different from true [2021-12-18 00:01:57,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:01:57,397 WARN L860 $PredicateComparison]: unable to prove that (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_4711 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |save_byte_from_array_~storage#1.base| v_ArrVal_4711))) is different from true [2021-12-18 00:01:57,412 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:01:57,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 00:01:57,418 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 8 treesize of output 4 [2021-12-18 00:01:57,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-18 00:01:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 72 proven. 120 refuted. 0 times theorem prover too weak. 38 trivial. 4 not checked. [2021-12-18 00:01:58,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:01:59,209 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-18 00:01:59,210 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-18 00:01:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-18 00:01:59,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164429099] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:01:59,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:01:59,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 33, 12] total 54 [2021-12-18 00:01:59,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210396585] [2021-12-18 00:01:59,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:01:59,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 00:01:59,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:01:59,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 00:01:59,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2371, Unknown=4, NotChecked=300, Total=2862 [2021-12-18 00:01:59,472 INFO L87 Difference]: Start difference. First operand 1376 states and 1738 transitions. Second operand has 54 states, 51 states have (on average 4.0) internal successors, (204), 49 states have internal predecessors, (204), 16 states have call successors, (51), 10 states have call predecessors, (51), 14 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2021-12-18 00:02:00,707 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4709 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_4709))) (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_4711 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |save_byte_from_array_~storage#1.base| v_ArrVal_4711)))) is different from true [2021-12-18 00:02:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:02:06,817 INFO L93 Difference]: Finished difference Result 1943 states and 2584 transitions. [2021-12-18 00:02:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-18 00:02:06,818 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 4.0) internal successors, (204), 49 states have internal predecessors, (204), 16 states have call successors, (51), 10 states have call predecessors, (51), 14 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) Word has length 167 [2021-12-18 00:02:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:02:06,823 INFO L225 Difference]: With dead ends: 1943 [2021-12-18 00:02:06,824 INFO L226 Difference]: Without dead ends: 1533 [2021-12-18 00:02:06,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 328 SyntacticMatches, 21 SemanticMatches, 109 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1144, Invalid=10207, Unknown=7, NotChecked=852, Total=12210 [2021-12-18 00:02:06,826 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 674 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 4728 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 10281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 4728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4818 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:02:06,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2375 Invalid, 10281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 4728 Invalid, 0 Unknown, 4818 Unchecked, 3.6s Time] [2021-12-18 00:02:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-12-18 00:02:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1362. [2021-12-18 00:02:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 972 states have (on average 1.1018518518518519) internal successors, (1071), 995 states have internal predecessors, (1071), 254 states have call successors, (254), 114 states have call predecessors, (254), 135 states have return successors, (378), 252 states have call predecessors, (378), 252 states have call successors, (378) [2021-12-18 00:02:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1703 transitions. [2021-12-18 00:02:06,929 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1703 transitions. Word has length 167 [2021-12-18 00:02:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:02:06,929 INFO L470 AbstractCegarLoop]: Abstraction has 1362 states and 1703 transitions. [2021-12-18 00:02:06,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 4.0) internal successors, (204), 49 states have internal predecessors, (204), 16 states have call successors, (51), 10 states have call predecessors, (51), 14 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2021-12-18 00:02:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1703 transitions. [2021-12-18 00:02:06,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-18 00:02:06,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:02:06,932 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:02:06,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 00:02:07,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-18 00:02:07,144 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:02:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:02:07,144 INFO L85 PathProgramCache]: Analyzing trace with hash -31255325, now seen corresponding path program 1 times [2021-12-18 00:02:07,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:02:07,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6963870] [2021-12-18 00:02:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:02:07,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:02:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:02:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:02:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:02:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:02:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:02:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:02:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:02:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:02:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:02:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:02:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:02:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:02:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:02:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:02:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:02:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:02:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:02:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:02:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:02:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:02:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-18 00:02:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-18 00:02:08,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:02:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6963870] [2021-12-18 00:02:08,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6963870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:02:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791374134] [2021-12-18 00:02:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:02:08,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:02:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:02:08,101 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:02:08,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 00:02:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:02:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-18 00:02:08,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:02:08,701 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 8 [2021-12-18 00:02:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:13,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 64 [2021-12-18 00:02:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 00:02:19,575 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4978 Int) (|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_4977 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| (store (store (select |c_old(#memory_int)| |save_byte_from_array_~storage#1.base|) |c_save_byte_from_array_#in~storage#1.offset| v_ArrVal_4977) (+ |c_save_byte_from_array_#in~storage#1.offset| 8) v_ArrVal_4978)))) is different from true [2021-12-18 00:02:19,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:19,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:19,612 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-12-18 00:02:19,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 62 [2021-12-18 00:02:20,147 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod |c_save_byte_from_array_#in~size#1| 18446744073709551616)) (exists ((v_ArrVal_4980 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_4980)))) is different from true [2021-12-18 00:02:20,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:02:20,168 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4981 (Array Int Int)) (|save_byte_from_array_~storage#1.base| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_4981))) (< 0 (mod |c_save_byte_from_array_#in~size#1| 18446744073709551616))) is different from true [2021-12-18 00:02:20,218 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-18 00:02:20,218 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 127 [2021-12-18 00:02:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:02:20,253 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 40 treesize of output 28 [2021-12-18 00:02:20,320 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 7 treesize of output 5 [2021-12-18 00:02:20,328 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 45 treesize of output 37 [2021-12-18 00:02:22,435 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_31| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_95| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_31| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_95|)) (or (let ((.cse1 (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~a#1.base_BEFORE_CALL_95|) 16) 18446744073709551616))) (let ((.cse0 (div (+ .cse1 (- 1)) (- 18446744073709551616)))) (< .cse0 (+ (div (+ (* .cse1 (- 1)) 36893488147419103230) 18446744073709551616) (div (* .cse0 (- 1)) 2) 1)))) (< 0 (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_ignore_case_~b#1.base_BEFORE_CALL_31|) 0) 18446744073709551616))))) is different from true [2021-12-18 00:03:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 141 proven. 66 refuted. 0 times theorem prover too weak. 37 trivial. 6 not checked. [2021-12-18 00:03:36,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:03:39,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791374134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:03:39,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:03:39,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 45] total 65 [2021-12-18 00:03:39,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009522912] [2021-12-18 00:03:39,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:03:39,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-18 00:03:39,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:03:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-18 00:03:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=4383, Unknown=27, NotChecked=548, Total=5256 [2021-12-18 00:03:39,761 INFO L87 Difference]: Start difference. First operand 1362 states and 1703 transitions. Second operand has 65 states, 59 states have (on average 2.9491525423728815) internal successors, (174), 55 states have internal predecessors, (174), 21 states have call successors, (42), 11 states have call predecessors, (42), 16 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) [2021-12-18 00:05:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:05:28,073 INFO L93 Difference]: Finished difference Result 2437 states and 3341 transitions. [2021-12-18 00:05:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-18 00:05:28,073 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 59 states have (on average 2.9491525423728815) internal successors, (174), 55 states have internal predecessors, (174), 21 states have call successors, (42), 11 states have call predecessors, (42), 16 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) Word has length 173 [2021-12-18 00:05:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:05:28,079 INFO L225 Difference]: With dead ends: 2437 [2021-12-18 00:05:28,079 INFO L226 Difference]: Without dead ends: 1886 [2021-12-18 00:05:28,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 198 SyntacticMatches, 11 SemanticMatches, 141 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 6480 ImplicationChecksByTransitivity, 187.3s TimeCoverageRelationStatistics Valid=1505, Invalid=17619, Unknown=74, NotChecked=1108, Total=20306 [2021-12-18 00:05:28,082 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 496 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 8402 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 15211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 8402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6039 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:05:28,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 2267 Invalid, 15211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 8402 Invalid, 0 Unknown, 6039 Unchecked, 6.9s Time] [2021-12-18 00:05:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-12-18 00:05:28,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1563. [2021-12-18 00:05:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1110 states have (on average 1.1054054054054054) internal successors, (1227), 1132 states have internal predecessors, (1227), 314 states have call successors, (314), 118 states have call predecessors, (314), 138 states have return successors, (472), 312 states have call predecessors, (472), 312 states have call successors, (472) [2021-12-18 00:05:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2013 transitions. [2021-12-18 00:05:28,171 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2013 transitions. Word has length 173 [2021-12-18 00:05:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:05:28,171 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2013 transitions. [2021-12-18 00:05:28,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 59 states have (on average 2.9491525423728815) internal successors, (174), 55 states have internal predecessors, (174), 21 states have call successors, (42), 11 states have call predecessors, (42), 16 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) [2021-12-18 00:05:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2013 transitions. [2021-12-18 00:05:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-18 00:05:28,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:05:28,174 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:05:28,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 00:05:28,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:05:28,387 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:05:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:05:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash 233953810, now seen corresponding path program 2 times [2021-12-18 00:05:28,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:05:28,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273338648] [2021-12-18 00:05:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:05:28,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:05:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:05:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:05:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:05:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:05:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:05:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:05:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:05:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:05:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:05:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:05:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:05:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:05:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:05:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:05:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:28,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:05:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:29,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:05:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:05:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:29,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:05:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:29,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:05:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:29,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:05:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-18 00:05:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:05:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-18 00:05:29,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:05:29,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273338648] [2021-12-18 00:05:29,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273338648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:05:29,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74446499] [2021-12-18 00:05:29,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:05:29,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:05:29,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:05:29,141 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:05:29,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 00:05:30,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:05:30,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:05:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 2966 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 00:05:30,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:05:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 143 proven. 15 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-18 00:05:50,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:05:50,870 INFO L354 Elim1Store]: treesize reduction 39, result has 46.6 percent of original size [2021-12-18 00:05:50,870 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 35 treesize of output 48 [2021-12-18 00:05:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-18 00:05:51,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74446499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:05:51,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:05:51,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 12] total 43 [2021-12-18 00:05:51,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512838374] [2021-12-18 00:05:51,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:05:51,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 00:05:51,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:05:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 00:05:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1657, Unknown=3, NotChecked=0, Total=1806 [2021-12-18 00:05:51,409 INFO L87 Difference]: Start difference. First operand 1563 states and 2013 transitions. Second operand has 43 states, 38 states have (on average 4.421052631578948) internal successors, (168), 37 states have internal predecessors, (168), 14 states have call successors, (55), 6 states have call predecessors, (55), 9 states have return successors, (54), 13 states have call predecessors, (54), 14 states have call successors, (54) [2021-12-18 00:06:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:06:06,980 INFO L93 Difference]: Finished difference Result 2605 states and 3524 transitions. [2021-12-18 00:06:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 00:06:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 4.421052631578948) internal successors, (168), 37 states have internal predecessors, (168), 14 states have call successors, (55), 6 states have call predecessors, (55), 9 states have return successors, (54), 13 states have call predecessors, (54), 14 states have call successors, (54) Word has length 167 [2021-12-18 00:06:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:06:06,989 INFO L225 Difference]: With dead ends: 2605 [2021-12-18 00:06:06,989 INFO L226 Difference]: Without dead ends: 1948 [2021-12-18 00:06:06,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 352 SyntacticMatches, 13 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=909, Invalid=7274, Unknown=7, NotChecked=0, Total=8190 [2021-12-18 00:06:06,993 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 292 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 5811 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 7166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 5811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1144 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:06:06,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 1831 Invalid, 7166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5811 Invalid, 0 Unknown, 1144 Unchecked, 4.8s Time] [2021-12-18 00:06:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-12-18 00:06:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1607. [2021-12-18 00:06:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1155 states have (on average 1.0952380952380953) internal successors, (1265), 1180 states have internal predecessors, (1265), 308 states have call successors, (308), 120 states have call predecessors, (308), 143 states have return successors, (445), 306 states have call predecessors, (445), 306 states have call successors, (445) [2021-12-18 00:06:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2018 transitions. [2021-12-18 00:06:07,116 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2018 transitions. Word has length 167 [2021-12-18 00:06:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:06:07,116 INFO L470 AbstractCegarLoop]: Abstraction has 1607 states and 2018 transitions. [2021-12-18 00:06:07,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 4.421052631578948) internal successors, (168), 37 states have internal predecessors, (168), 14 states have call successors, (55), 6 states have call predecessors, (55), 9 states have return successors, (54), 13 states have call predecessors, (54), 14 states have call successors, (54) [2021-12-18 00:06:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2018 transitions. [2021-12-18 00:06:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-18 00:06:07,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:06:07,121 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:06:07,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 00:06:07,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:06:07,347 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:06:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:06:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1995829804, now seen corresponding path program 1 times [2021-12-18 00:06:07,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:06:07,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835429181] [2021-12-18 00:06:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:06:07,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:06:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:06:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:06:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:06:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:06:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:06:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:06:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:06:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:06:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:06:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:06:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:06:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:06:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:06:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:06:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:06:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:06:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:06:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:08,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:06:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:09,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:06:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:09,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:06:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-18 00:06:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-12-18 00:06:09,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:06:09,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835429181] [2021-12-18 00:06:09,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835429181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:06:09,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129061100] [2021-12-18 00:06:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:06:09,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:06:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:06:09,076 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:06:09,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 00:06:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:06:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-18 00:06:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:06:09,809 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 8 [2021-12-18 00:06:09,997 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 13 treesize of output 9 [2021-12-18 00:06:10,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:06:10,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:06:10,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:06:10,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2021-12-18 00:06:11,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:06:11,251 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5467 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_5467))) is different from true [2021-12-18 00:06:11,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:06:11,265 WARN L860 $PredicateComparison]: unable to prove that (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_5468 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |save_byte_from_array_~storage#1.base| v_ArrVal_5468))) is different from true [2021-12-18 00:06:11,282 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:06:11,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-18 00:06:11,288 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 7 treesize of output 3 [2021-12-18 00:06:11,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:06:11,505 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 00:06:11,509 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_arrayElimArr_2 (Array Int Int)) (|save_byte_from_array_~storage#1.base| Int)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |save_byte_from_array_~storage#1.base| v_arrayElimArr_2))) is different from true [2021-12-18 00:06:11,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:06:54,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:06:54,365 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-12-18 00:06:54,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:06:54,369 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2021-12-18 00:06:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 110 proven. 100 refuted. 0 times theorem prover too weak. 42 trivial. 4 not checked. [2021-12-18 00:06:54,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:06:56,376 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-18 00:06:56,377 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-18 00:06:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 63 proven. 41 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-18 00:06:56,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129061100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:06:56,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:06:56,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 50, 21] total 94 [2021-12-18 00:06:56,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908306769] [2021-12-18 00:06:56,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:06:56,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-18 00:06:56,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:06:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-18 00:06:56,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=7871, Unknown=9, NotChecked=540, Total=8742 [2021-12-18 00:06:56,836 INFO L87 Difference]: Start difference. First operand 1607 states and 2018 transitions. Second operand has 94 states, 82 states have (on average 2.8048780487804876) internal successors, (230), 77 states have internal predecessors, (230), 29 states have call successors, (64), 11 states have call predecessors, (64), 21 states have return successors, (61), 28 states have call predecessors, (61), 27 states have call successors, (61) [2021-12-18 00:07:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:07:25,948 INFO L93 Difference]: Finished difference Result 2500 states and 3542 transitions. [2021-12-18 00:07:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-18 00:07:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 82 states have (on average 2.8048780487804876) internal successors, (230), 77 states have internal predecessors, (230), 29 states have call successors, (64), 11 states have call predecessors, (64), 21 states have return successors, (61), 28 states have call predecessors, (61), 27 states have call successors, (61) Word has length 175 [2021-12-18 00:07:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:07:25,965 INFO L225 Difference]: With dead ends: 2500 [2021-12-18 00:07:25,965 INFO L226 Difference]: Without dead ends: 2310 [2021-12-18 00:07:25,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 330 SyntacticMatches, 9 SemanticMatches, 189 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 9932 ImplicationChecksByTransitivity, 65.5s TimeCoverageRelationStatistics Valid=1612, Invalid=33535, Unknown=21, NotChecked=1122, Total=36290 [2021-12-18 00:07:25,968 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 460 mSDsluCounter, 6190 mSDsCounter, 0 mSdLazyCounter, 13263 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 6452 SdHoareTripleChecker+Invalid, 18582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 13263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4605 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:07:25,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 6452 Invalid, 18582 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [714 Valid, 13263 Invalid, 0 Unknown, 4605 Unchecked, 8.4s Time] [2021-12-18 00:07:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-12-18 00:07:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1845. [2021-12-18 00:07:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1315 states have (on average 1.091254752851711) internal successors, (1435), 1340 states have internal predecessors, (1435), 368 states have call successors, (368), 139 states have call predecessors, (368), 161 states have return successors, (530), 365 states have call predecessors, (530), 366 states have call successors, (530) [2021-12-18 00:07:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2333 transitions. [2021-12-18 00:07:26,112 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2333 transitions. Word has length 175 [2021-12-18 00:07:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:07:26,112 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 2333 transitions. [2021-12-18 00:07:26,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 82 states have (on average 2.8048780487804876) internal successors, (230), 77 states have internal predecessors, (230), 29 states have call successors, (64), 11 states have call predecessors, (64), 21 states have return successors, (61), 28 states have call predecessors, (61), 27 states have call successors, (61) [2021-12-18 00:07:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2333 transitions. [2021-12-18 00:07:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-18 00:07:26,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:07:26,116 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:07:26,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 00:07:26,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:07:26,317 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:07:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:07:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1050364345, now seen corresponding path program 1 times [2021-12-18 00:07:26,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:07:26,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111898630] [2021-12-18 00:07:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:07:26,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:07:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:07:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:07:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:07:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:07:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:07:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:07:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:07:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:07:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:07:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:07:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:07:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:07:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:07:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:07:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:07:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:07:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-18 00:07:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-18 00:07:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 40 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-18 00:07:26,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:07:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111898630] [2021-12-18 00:07:26,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111898630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:07:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091955362] [2021-12-18 00:07:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:07:26,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:07:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:07:26,739 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:07:26,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 00:07:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:27,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2931 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 00:07:27,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:07:27,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:07:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:27,725 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 00:07:27,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 53 [2021-12-18 00:07:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 94 proven. 49 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-18 00:07:29,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:07:39,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091955362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:07:39,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:07:39,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 30 [2021-12-18 00:07:39,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061522022] [2021-12-18 00:07:39,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:07:39,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 00:07:39,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:07:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 00:07:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1407, Unknown=1, NotChecked=0, Total=1560 [2021-12-18 00:07:39,919 INFO L87 Difference]: Start difference. First operand 1845 states and 2333 transitions. Second operand has 30 states, 28 states have (on average 5.285714285714286) internal successors, (148), 27 states have internal predecessors, (148), 13 states have call successors, (42), 7 states have call predecessors, (42), 6 states have return successors, (41), 11 states have call predecessors, (41), 12 states have call successors, (41) [2021-12-18 00:07:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:07:43,021 INFO L93 Difference]: Finished difference Result 2278 states and 2919 transitions. [2021-12-18 00:07:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 00:07:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 5.285714285714286) internal successors, (148), 27 states have internal predecessors, (148), 13 states have call successors, (42), 7 states have call predecessors, (42), 6 states have return successors, (41), 11 states have call predecessors, (41), 12 states have call successors, (41) Word has length 179 [2021-12-18 00:07:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:07:43,048 INFO L225 Difference]: With dead ends: 2278 [2021-12-18 00:07:43,048 INFO L226 Difference]: Without dead ends: 2125 [2021-12-18 00:07:43,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 297 SyntacticMatches, 23 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=502, Invalid=4189, Unknown=1, NotChecked=0, Total=4692 [2021-12-18 00:07:43,050 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 157 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 4950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1918 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:07:43,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 2214 Invalid, 4950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2872 Invalid, 0 Unknown, 1918 Unchecked, 2.0s Time] [2021-12-18 00:07:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-12-18 00:07:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1956. [2021-12-18 00:07:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1402 states have (on average 1.0898716119828815) internal successors, (1528), 1428 states have internal predecessors, (1528), 374 states have call successors, (374), 156 states have call predecessors, (374), 179 states have return successors, (531), 371 states have call predecessors, (531), 372 states have call successors, (531) [2021-12-18 00:07:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2433 transitions. [2021-12-18 00:07:43,161 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2433 transitions. Word has length 179 [2021-12-18 00:07:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:07:43,161 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 2433 transitions. [2021-12-18 00:07:43,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 5.285714285714286) internal successors, (148), 27 states have internal predecessors, (148), 13 states have call successors, (42), 7 states have call predecessors, (42), 6 states have return successors, (41), 11 states have call predecessors, (41), 12 states have call successors, (41) [2021-12-18 00:07:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2433 transitions. [2021-12-18 00:07:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-18 00:07:43,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:07:43,166 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:07:43,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 00:07:43,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-18 00:07:43,379 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:07:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:07:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash -448591476, now seen corresponding path program 1 times [2021-12-18 00:07:43,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:07:43,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287400850] [2021-12-18 00:07:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:07:43,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:07:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:07:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:07:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:07:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:07:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:07:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:07:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:07:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:07:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:07:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:07:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:07:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:07:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:07:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:07:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:07:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:07:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-18 00:07:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-18 00:07:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-12-18 00:07:43,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:07:43,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287400850] [2021-12-18 00:07:43,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287400850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:07:43,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:07:43,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 00:07:43,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059425561] [2021-12-18 00:07:43,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:07:43,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 00:07:43,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:07:43,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 00:07:43,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:07:43,662 INFO L87 Difference]: Start difference. First operand 1956 states and 2433 transitions. Second operand has 13 states, 12 states have (on average 5.5) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:07:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:07:44,383 INFO L93 Difference]: Finished difference Result 2000 states and 2496 transitions. [2021-12-18 00:07:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 00:07:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 181 [2021-12-18 00:07:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:07:44,387 INFO L225 Difference]: With dead ends: 2000 [2021-12-18 00:07:44,388 INFO L226 Difference]: Without dead ends: 1998 [2021-12-18 00:07:44,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-18 00:07:44,389 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 103 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:07:44,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1007 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 00:07:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-12-18 00:07:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1984. [2021-12-18 00:07:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1418 states have (on average 1.0888575458392102) internal successors, (1544), 1447 states have internal predecessors, (1544), 381 states have call successors, (381), 158 states have call predecessors, (381), 184 states have return successors, (552), 378 states have call predecessors, (552), 379 states have call successors, (552) [2021-12-18 00:07:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2477 transitions. [2021-12-18 00:07:44,491 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2477 transitions. Word has length 181 [2021-12-18 00:07:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:07:44,491 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 2477 transitions. [2021-12-18 00:07:44,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-18 00:07:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2477 transitions. [2021-12-18 00:07:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-18 00:07:44,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:07:44,495 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:07:44,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-18 00:07:44,496 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:07:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:07:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash -336126619, now seen corresponding path program 1 times [2021-12-18 00:07:44,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:07:44,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275834793] [2021-12-18 00:07:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:07:44,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:07:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:07:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:07:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:07:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:07:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:07:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:07:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:07:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:07:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:07:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:07:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:07:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:07:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:07:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:07:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-18 00:07:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:07:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:07:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:07:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-18 00:07:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-18 00:07:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-18 00:07:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-12-18 00:07:44,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:07:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275834793] [2021-12-18 00:07:44,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275834793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:07:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536838118] [2021-12-18 00:07:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:07:44,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:07:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:07:44,957 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:07:44,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 00:07:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:07:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 3034 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-18 00:07:45,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:07:45,648 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:07:45,648 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 00:07:46,059 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:07:46,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 00:07:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:07:46,431 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 00:07:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2021-12-18 00:07:46,498 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 00:07:46,498 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 19 treesize of output 19 [2021-12-18 00:07:48,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:07:48,663 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5969 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_5969))) is different from true [2021-12-18 00:07:48,683 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-18 00:07:48,684 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-18 00:07:48,692 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 18 treesize of output 14 [2021-12-18 00:07:48,740 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5970 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_5970))) is different from true [2021-12-18 00:07:48,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:07:48,751 WARN L860 $PredicateComparison]: unable to prove that (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_5971 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_5971))) is different from true [2021-12-18 00:07:48,765 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:07:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 00:07:48,770 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 8 treesize of output 6 [2021-12-18 00:07:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 71 proven. 106 refuted. 0 times theorem prover too weak. 99 trivial. 4 not checked. [2021-12-18 00:07:49,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:07:50,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536838118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:07:50,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:07:50,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 32] total 43 [2021-12-18 00:07:50,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971687814] [2021-12-18 00:07:50,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:07:50,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 00:07:50,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:07:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 00:07:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2102, Unknown=5, NotChecked=282, Total=2550 [2021-12-18 00:07:50,323 INFO L87 Difference]: Start difference. First operand 1984 states and 2477 transitions. Second operand has 43 states, 39 states have (on average 4.076923076923077) internal successors, (159), 38 states have internal predecessors, (159), 17 states have call successors, (46), 9 states have call predecessors, (46), 11 states have return successors, (45), 16 states have call predecessors, (45), 17 states have call successors, (45) [2021-12-18 00:07:57,646 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5969 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_5969))) (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_5971 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_5971)))) is different from true [2021-12-18 00:08:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:08:00,653 INFO L93 Difference]: Finished difference Result 2408 states and 3172 transitions. [2021-12-18 00:08:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 00:08:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 4.076923076923077) internal successors, (159), 38 states have internal predecessors, (159), 17 states have call successors, (46), 9 states have call predecessors, (46), 11 states have return successors, (45), 16 states have call predecessors, (45), 17 states have call successors, (45) Word has length 187 [2021-12-18 00:08:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:08:00,659 INFO L225 Difference]: With dead ends: 2408 [2021-12-18 00:08:00,660 INFO L226 Difference]: Without dead ends: 2122 [2021-12-18 00:08:00,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 232 SyntacticMatches, 17 SemanticMatches, 82 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=592, Invalid=5734, Unknown=10, NotChecked=636, Total=6972 [2021-12-18 00:08:00,662 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 598 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 3569 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 7586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 3569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3466 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:08:00,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 1868 Invalid, 7586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 3569 Invalid, 0 Unknown, 3466 Unchecked, 2.5s Time] [2021-12-18 00:08:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-12-18 00:08:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1937. [2021-12-18 00:08:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1384 states have (on average 1.0874277456647399) internal successors, (1505), 1414 states have internal predecessors, (1505), 370 states have call successors, (370), 155 states have call predecessors, (370), 182 states have return successors, (541), 367 states have call predecessors, (541), 368 states have call successors, (541) [2021-12-18 00:08:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2416 transitions. [2021-12-18 00:08:00,778 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2416 transitions. Word has length 187 [2021-12-18 00:08:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:08:00,778 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 2416 transitions. [2021-12-18 00:08:00,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 4.076923076923077) internal successors, (159), 38 states have internal predecessors, (159), 17 states have call successors, (46), 9 states have call predecessors, (46), 11 states have return successors, (45), 16 states have call predecessors, (45), 17 states have call successors, (45) [2021-12-18 00:08:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2416 transitions. [2021-12-18 00:08:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-18 00:08:00,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:08:00,783 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:08:00,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-18 00:08:00,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 00:08:00,993 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:08:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:08:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash -193680755, now seen corresponding path program 1 times [2021-12-18 00:08:00,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:08:00,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529521801] [2021-12-18 00:08:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:00,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:08:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:08:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:08:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:08:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:08:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:08:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:08:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 00:08:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-18 00:08:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:08:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:08:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:08:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-18 00:08:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-18 00:08:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-18 00:08:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-18 00:08:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-18 00:08:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-18 00:08:01,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:08:01,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529521801] [2021-12-18 00:08:01,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529521801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:08:01,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106355316] [2021-12-18 00:08:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:01,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:08:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:08:01,565 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:08:01,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 00:08:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:02,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2954 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-18 00:08:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:08:02,206 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 8 [2021-12-18 00:08:02,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:08:02,361 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 13 treesize of output 9 [2021-12-18 00:08:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 47 [2021-12-18 00:08:03,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-12-18 00:08:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:08:03,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-12-18 00:08:03,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 8 [2021-12-18 00:08:11,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 15 [2021-12-18 00:08:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-18 00:08:11,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:08:30,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:08:30,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:08:30,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:08:30,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:08:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 84 [2021-12-18 00:08:30,636 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 14 treesize of output 10 [2021-12-18 00:08:30,650 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 14 treesize of output 10 [2021-12-18 00:08:30,684 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 14 treesize of output 10 [2021-12-18 00:08:30,701 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 14 treesize of output 10 [2021-12-18 00:08:32,933 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 14 treesize of output 10 [2021-12-18 00:08:32,946 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 14 treesize of output 10 [2021-12-18 00:08:32,983 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 14 treesize of output 10 [2021-12-18 00:08:33,000 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 14 treesize of output 10 [2021-12-18 00:08:33,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106355316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:08:33,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:08:33,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 34] total 45 [2021-12-18 00:08:33,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435325860] [2021-12-18 00:08:33,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:08:33,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 00:08:33,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:08:33,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 00:08:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3167, Unknown=9, NotChecked=0, Total=3540 [2021-12-18 00:08:33,029 INFO L87 Difference]: Start difference. First operand 1937 states and 2416 transitions. Second operand has 45 states, 38 states have (on average 4.052631578947368) internal successors, (154), 34 states have internal predecessors, (154), 18 states have call successors, (46), 10 states have call predecessors, (46), 11 states have return successors, (44), 16 states have call predecessors, (44), 16 states have call successors, (44) [2021-12-18 00:08:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:08:35,643 INFO L93 Difference]: Finished difference Result 2127 states and 2636 transitions. [2021-12-18 00:08:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 00:08:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 38 states have (on average 4.052631578947368) internal successors, (154), 34 states have internal predecessors, (154), 18 states have call successors, (46), 10 states have call predecessors, (46), 11 states have return successors, (44), 16 states have call predecessors, (44), 16 states have call successors, (44) Word has length 189 [2021-12-18 00:08:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:08:35,649 INFO L225 Difference]: With dead ends: 2127 [2021-12-18 00:08:35,649 INFO L226 Difference]: Without dead ends: 2008 [2021-12-18 00:08:35,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 302 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=724, Invalid=6407, Unknown=9, NotChecked=0, Total=7140 [2021-12-18 00:08:35,650 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 313 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 4448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1420 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:08:35,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1376 Invalid, 4448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2758 Invalid, 0 Unknown, 1420 Unchecked, 1.6s Time] [2021-12-18 00:08:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-12-18 00:08:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1968. [2021-12-18 00:08:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1405 states have (on average 1.088256227758007) internal successors, (1529), 1433 states have internal predecessors, (1529), 377 states have call successors, (377), 160 states have call predecessors, (377), 185 states have return successors, (550), 374 states have call predecessors, (550), 374 states have call successors, (550) [2021-12-18 00:08:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2456 transitions. [2021-12-18 00:08:35,794 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2456 transitions. Word has length 189 [2021-12-18 00:08:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:08:35,795 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2456 transitions. [2021-12-18 00:08:35,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 38 states have (on average 4.052631578947368) internal successors, (154), 34 states have internal predecessors, (154), 18 states have call successors, (46), 10 states have call predecessors, (46), 11 states have return successors, (44), 16 states have call predecessors, (44), 16 states have call successors, (44) [2021-12-18 00:08:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2456 transitions. [2021-12-18 00:08:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-18 00:08:35,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:08:35,799 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:08:35,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 00:08:36,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 00:08:36,011 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:08:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:08:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash -895500203, now seen corresponding path program 1 times [2021-12-18 00:08:36,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:08:36,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16762779] [2021-12-18 00:08:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:36,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:08:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:08:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:08:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:08:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:08:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:08:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:08:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:08:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 00:08:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:08:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 00:08:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-18 00:08:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 00:08:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 00:08:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-18 00:08:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-18 00:08:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-18 00:08:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-18 00:08:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-18 00:08:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 39 proven. 10 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-18 00:08:36,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:08:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16762779] [2021-12-18 00:08:36,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16762779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:08:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69649973] [2021-12-18 00:08:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:36,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:08:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:08:36,814 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:08:36,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 00:08:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 00:08:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:08:37,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:08:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-18 00:08:37,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:08:37,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69649973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:08:37,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:08:37,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 25 [2021-12-18 00:08:37,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692342126] [2021-12-18 00:08:37,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:08:37,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 00:08:37,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:08:37,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 00:08:37,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-12-18 00:08:37,918 INFO L87 Difference]: Start difference. First operand 1968 states and 2456 transitions. Second operand has 13 states, 12 states have (on average 8.0) internal successors, (96), 10 states have internal predecessors, (96), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2021-12-18 00:08:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:08:38,191 INFO L93 Difference]: Finished difference Result 2730 states and 3432 transitions. [2021-12-18 00:08:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 00:08:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 8.0) internal successors, (96), 10 states have internal predecessors, (96), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) Word has length 204 [2021-12-18 00:08:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:08:38,200 INFO L225 Difference]: With dead ends: 2730 [2021-12-18 00:08:38,200 INFO L226 Difference]: Without dead ends: 2032 [2021-12-18 00:08:38,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 247 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:08:38,205 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 70 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:08:38,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1890 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 217 Unchecked, 0.1s Time] [2021-12-18 00:08:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-12-18 00:08:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2003. [2021-12-18 00:08:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 1437 states have (on average 1.0890744606819764) internal successors, (1565), 1467 states have internal predecessors, (1565), 377 states have call successors, (377), 161 states have call predecessors, (377), 188 states have return successors, (540), 374 states have call predecessors, (540), 374 states have call successors, (540) [2021-12-18 00:08:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 2482 transitions. [2021-12-18 00:08:38,342 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 2482 transitions. Word has length 204 [2021-12-18 00:08:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:08:38,342 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 2482 transitions. [2021-12-18 00:08:38,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 8.0) internal successors, (96), 10 states have internal predecessors, (96), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2021-12-18 00:08:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 2482 transitions. [2021-12-18 00:08:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-18 00:08:38,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:08:38,346 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:08:38,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 00:08:38,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 00:08:38,563 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:08:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:08:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 18989967, now seen corresponding path program 2 times [2021-12-18 00:08:38,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:08:38,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783175507] [2021-12-18 00:08:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:38,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:08:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:08:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:08:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:08:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:08:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:08:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:08:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:08:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 00:08:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:08:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-18 00:08:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-18 00:08:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:08:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-18 00:08:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-18 00:08:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 00:08:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-18 00:08:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-18 00:08:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-18 00:08:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-18 00:08:38,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:08:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783175507] [2021-12-18 00:08:38,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783175507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:08:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263977175] [2021-12-18 00:08:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:08:38,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:08:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:08:38,998 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:08:39,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 00:08:40,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:08:40,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:08:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 3009 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:08:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:08:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-18 00:08:40,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:08:40,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263977175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:08:40,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:08:40,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-18 00:08:40,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200390058] [2021-12-18 00:08:40,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:08:40,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:08:40,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:08:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:08:40,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:08:40,975 INFO L87 Difference]: Start difference. First operand 2003 states and 2482 transitions. Second operand has 9 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-12-18 00:08:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:08:41,198 INFO L93 Difference]: Finished difference Result 2464 states and 3015 transitions. [2021-12-18 00:08:41,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:08:41,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 208 [2021-12-18 00:08:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:08:41,205 INFO L225 Difference]: With dead ends: 2464 [2021-12-18 00:08:41,206 INFO L226 Difference]: Without dead ends: 1729 [2021-12-18 00:08:41,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:08:41,210 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 12 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:08:41,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1348 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:08:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-12-18 00:08:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1712. [2021-12-18 00:08:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1266 states have (on average 1.0900473933649288) internal successors, (1380), 1290 states have internal predecessors, (1380), 282 states have call successors, (282), 142 states have call predecessors, (282), 163 states have return successors, (385), 279 states have call predecessors, (385), 279 states have call successors, (385) [2021-12-18 00:08:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2047 transitions. [2021-12-18 00:08:41,326 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2047 transitions. Word has length 208 [2021-12-18 00:08:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:08:41,327 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2047 transitions. [2021-12-18 00:08:41,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-12-18 00:08:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2047 transitions. [2021-12-18 00:08:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-18 00:08:41,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:08:41,331 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:08:41,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 00:08:41,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 00:08:41,560 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:08:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:08:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1186530910, now seen corresponding path program 1 times [2021-12-18 00:08:41,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:08:41,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641600957] [2021-12-18 00:08:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:41,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:08:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:08:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:08:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:08:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:08:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:08:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:08:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:08:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-18 00:08:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:08:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:08:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-18 00:08:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 00:08:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:08:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-18 00:08:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-18 00:08:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-18 00:08:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-18 00:08:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-18 00:08:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-18 00:08:42,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:08:42,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641600957] [2021-12-18 00:08:42,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641600957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:08:42,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588069299] [2021-12-18 00:08:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:42,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:08:42,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:08:42,428 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:08:42,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 00:08:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:43,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 3016 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 00:08:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:08:43,560 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 13 treesize of output 9 [2021-12-18 00:08:44,379 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-18 00:08:44,379 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 11 [2021-12-18 00:08:44,382 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 18 treesize of output 10 [2021-12-18 00:08:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 228 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-18 00:08:44,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:08:45,366 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 33 treesize of output 25 [2021-12-18 00:08:45,653 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-18 00:08:45,653 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 00:08:45,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-18 00:08:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-18 00:08:46,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588069299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:08:46,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:08:46,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17] total 49 [2021-12-18 00:08:46,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64503434] [2021-12-18 00:08:46,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:08:46,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 00:08:46,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:08:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 00:08:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 00:08:46,157 INFO L87 Difference]: Start difference. First operand 1712 states and 2047 transitions. Second operand has 49 states, 43 states have (on average 5.27906976744186) internal successors, (227), 41 states have internal predecessors, (227), 18 states have call successors, (74), 10 states have call predecessors, (74), 17 states have return successors, (72), 16 states have call predecessors, (72), 18 states have call successors, (72) [2021-12-18 00:08:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:08:50,847 INFO L93 Difference]: Finished difference Result 2017 states and 2439 transitions. [2021-12-18 00:08:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 00:08:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 5.27906976744186) internal successors, (227), 41 states have internal predecessors, (227), 18 states have call successors, (74), 10 states have call predecessors, (74), 17 states have return successors, (72), 16 states have call predecessors, (72), 18 states have call successors, (72) Word has length 210 [2021-12-18 00:08:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:08:50,851 INFO L225 Difference]: With dead ends: 2017 [2021-12-18 00:08:50,852 INFO L226 Difference]: Without dead ends: 1331 [2021-12-18 00:08:50,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 449 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=546, Invalid=5004, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 00:08:50,854 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 418 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 5473 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 6594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 5473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 804 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:08:50,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1694 Invalid, 6594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 5473 Invalid, 0 Unknown, 804 Unchecked, 3.4s Time] [2021-12-18 00:08:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-12-18 00:08:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1257. [2021-12-18 00:08:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 923 states have (on average 1.0834236186348862) internal successors, (1000), 939 states have internal predecessors, (1000), 217 states have call successors, (217), 103 states have call predecessors, (217), 116 states have return successors, (290), 214 states have call predecessors, (290), 215 states have call successors, (290) [2021-12-18 00:08:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1507 transitions. [2021-12-18 00:08:50,927 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1507 transitions. Word has length 210 [2021-12-18 00:08:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:08:50,927 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 1507 transitions. [2021-12-18 00:08:50,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 5.27906976744186) internal successors, (227), 41 states have internal predecessors, (227), 18 states have call successors, (74), 10 states have call predecessors, (74), 17 states have return successors, (72), 16 states have call predecessors, (72), 18 states have call successors, (72) [2021-12-18 00:08:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1507 transitions. [2021-12-18 00:08:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-18 00:08:50,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:08:50,929 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:08:50,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 00:08:51,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:08:51,130 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:08:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:08:51,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1699293645, now seen corresponding path program 1 times [2021-12-18 00:08:51,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:08:51,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875512772] [2021-12-18 00:08:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:51,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:08:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:08:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:08:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:08:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:08:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:08:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:08:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:08:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:08:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:08:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:08:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:08:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:08:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:08:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:08:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:08:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:08:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:08:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-18 00:08:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-18 00:08:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:08:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-18 00:08:53,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:08:53,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875512772] [2021-12-18 00:08:53,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875512772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:08:53,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230042224] [2021-12-18 00:08:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:08:53,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:08:53,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:08:53,583 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:08:53,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 00:08:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:08:54,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 3057 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 00:08:54,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:08:54,366 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6803 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_6803))) is different from true [2021-12-18 00:08:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:08:54,380 WARN L860 $PredicateComparison]: unable to prove that (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_6804 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_6804))) is different from true [2021-12-18 00:08:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:08:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 195 proven. 28 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-18 00:08:55,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:08:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-18 00:08:55,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230042224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:08:55,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:08:55,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 9] total 32 [2021-12-18 00:08:55,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116339903] [2021-12-18 00:08:55,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:08:55,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 00:08:55,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:08:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 00:08:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=771, Unknown=2, NotChecked=114, Total=992 [2021-12-18 00:08:55,626 INFO L87 Difference]: Start difference. First operand 1257 states and 1507 transitions. Second operand has 32 states, 32 states have (on average 5.6875) internal successors, (182), 29 states have internal predecessors, (182), 8 states have call successors, (51), 7 states have call predecessors, (51), 8 states have return successors, (48), 8 states have call predecessors, (48), 7 states have call successors, (48) [2021-12-18 00:09:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:09:00,205 INFO L93 Difference]: Finished difference Result 1599 states and 1958 transitions. [2021-12-18 00:09:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 00:09:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.6875) internal successors, (182), 29 states have internal predecessors, (182), 8 states have call successors, (51), 7 states have call predecessors, (51), 8 states have return successors, (48), 8 states have call predecessors, (48), 7 states have call successors, (48) Word has length 199 [2021-12-18 00:09:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:09:00,210 INFO L225 Difference]: With dead ends: 1599 [2021-12-18 00:09:00,211 INFO L226 Difference]: Without dead ends: 1420 [2021-12-18 00:09:00,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 426 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=339, Invalid=1812, Unknown=19, NotChecked=182, Total=2352 [2021-12-18 00:09:00,212 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 496 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1037 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:09:00,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 1429 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1856 Invalid, 0 Unknown, 1037 Unchecked, 1.5s Time] [2021-12-18 00:09:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-12-18 00:09:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1320. [2021-12-18 00:09:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 977 states have (on average 1.0808597748208801) internal successors, (1056), 994 states have internal predecessors, (1056), 217 states have call successors, (217), 111 states have call predecessors, (217), 125 states have return successors, (278), 214 states have call predecessors, (278), 215 states have call successors, (278) [2021-12-18 00:09:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1551 transitions. [2021-12-18 00:09:00,308 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1551 transitions. Word has length 199 [2021-12-18 00:09:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:09:00,309 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1551 transitions. [2021-12-18 00:09:00,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.6875) internal successors, (182), 29 states have internal predecessors, (182), 8 states have call successors, (51), 7 states have call predecessors, (51), 8 states have return successors, (48), 8 states have call predecessors, (48), 7 states have call successors, (48) [2021-12-18 00:09:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1551 transitions. [2021-12-18 00:09:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-18 00:09:00,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:09:00,312 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:09:00,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 00:09:00,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:09:00,527 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:09:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:09:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash -147219695, now seen corresponding path program 1 times [2021-12-18 00:09:00,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:09:00,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883094209] [2021-12-18 00:09:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:09:00,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:09:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:09:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:09:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:09:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:09:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:09:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:09:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:09:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:09:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:09:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:09:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:09:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:09:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:09:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:09:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:09:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:09:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:09:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:09:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:09:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:09:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-18 00:09:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-18 00:09:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:09:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-18 00:09:03,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:09:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883094209] [2021-12-18 00:09:03,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883094209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:09:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252918672] [2021-12-18 00:09:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:09:03,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:09:03,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:09:03,502 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:09:03,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 00:09:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 00:09:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:09:04,482 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7047 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_7047))) is different from true [2021-12-18 00:09:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:09:04,499 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7048 (Array Int Int)) (|save_byte_from_array_~storage#1.base| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_7048))) is different from true [2021-12-18 00:09:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:09:06,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:09:06,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:09:06,082 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-12-18 00:09:06,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 84 treesize of output 1 [2021-12-18 00:09:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 202 proven. 21 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-18 00:09:06,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:09:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-18 00:09:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252918672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:09:06,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:09:06,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 11] total 43 [2021-12-18 00:09:06,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281133642] [2021-12-18 00:09:06,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:09:06,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 00:09:06,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:09:06,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 00:09:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1489, Unknown=2, NotChecked=158, Total=1806 [2021-12-18 00:09:06,999 INFO L87 Difference]: Start difference. First operand 1320 states and 1551 transitions. Second operand has 43 states, 41 states have (on average 4.804878048780488) internal successors, (197), 40 states have internal predecessors, (197), 12 states have call successors, (53), 7 states have call predecessors, (53), 9 states have return successors, (50), 10 states have call predecessors, (50), 11 states have call successors, (50) [2021-12-18 00:09:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:09:15,862 INFO L93 Difference]: Finished difference Result 1827 states and 2252 transitions. [2021-12-18 00:09:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-18 00:09:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.804878048780488) internal successors, (197), 40 states have internal predecessors, (197), 12 states have call successors, (53), 7 states have call predecessors, (53), 9 states have return successors, (50), 10 states have call predecessors, (50), 11 states have call successors, (50) Word has length 199 [2021-12-18 00:09:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:09:15,867 INFO L225 Difference]: With dead ends: 1827 [2021-12-18 00:09:15,868 INFO L226 Difference]: Without dead ends: 1673 [2021-12-18 00:09:15,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 424 SyntacticMatches, 16 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1057, Invalid=6048, Unknown=43, NotChecked=334, Total=7482 [2021-12-18 00:09:15,870 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 349 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 5058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1567 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:09:15,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 2180 Invalid, 5058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3318 Invalid, 0 Unknown, 1567 Unchecked, 3.1s Time] [2021-12-18 00:09:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-12-18 00:09:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1378. [2021-12-18 00:09:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1026 states have (on average 1.0789473684210527) internal successors, (1107), 1047 states have internal predecessors, (1107), 220 states have call successors, (220), 113 states have call predecessors, (220), 131 states have return successors, (288), 217 states have call predecessors, (288), 218 states have call successors, (288) [2021-12-18 00:09:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1615 transitions. [2021-12-18 00:09:15,977 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1615 transitions. Word has length 199 [2021-12-18 00:09:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:09:15,977 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 1615 transitions. [2021-12-18 00:09:15,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.804878048780488) internal successors, (197), 40 states have internal predecessors, (197), 12 states have call successors, (53), 7 states have call predecessors, (53), 9 states have return successors, (50), 10 states have call predecessors, (50), 11 states have call successors, (50) [2021-12-18 00:09:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1615 transitions. [2021-12-18 00:09:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 00:09:15,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:09:15,980 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:09:16,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-18 00:09:16,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:09:16,180 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:09:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:09:16,181 INFO L85 PathProgramCache]: Analyzing trace with hash 591087960, now seen corresponding path program 1 times [2021-12-18 00:09:16,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:09:16,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502274965] [2021-12-18 00:09:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:09:16,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:09:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:09:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:09:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:09:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:09:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:09:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:09:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 00:09:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-18 00:09:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:09:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:09:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:09:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:09:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:09:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:09:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-18 00:09:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:09:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-18 00:09:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:09:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:09:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-18 00:09:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-18 00:09:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-18 00:09:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:17,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-18 00:09:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 66 proven. 6 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-18 00:09:18,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:09:18,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502274965] [2021-12-18 00:09:18,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502274965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:09:18,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081159452] [2021-12-18 00:09:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:09:18,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:09:18,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:09:18,116 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:09:18,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 00:09:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:09:18,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 147 conjunts are in the unsatisfiable core [2021-12-18 00:09:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:09:19,068 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 13 treesize of output 9 [2021-12-18 00:09:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:09:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:09:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:09:38,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-12-18 00:09:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-18 00:09:40,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:09:40,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:09:40,325 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7301 (Array Int Int)) (|save_byte_from_array_~storage#1.base| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |save_byte_from_array_~storage#1.base| v_ArrVal_7301))) is different from true [2021-12-18 00:09:40,340 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:09:40,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 00:09:40,345 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 8 treesize of output 4 [2021-12-18 00:09:42,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:09:42,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:09:42,755 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 00:09:42,759 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-18 00:09:44,909 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:09:44,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2021-12-18 00:09:44,921 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:09:44,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2021-12-18 00:09:44,929 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 8 treesize of output 4 [2021-12-18 00:09:44,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:10:23,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:10:23,270 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-12-18 00:10:23,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:10:23,275 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2021-12-18 00:10:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 121 proven. 94 refuted. 0 times theorem prover too weak. 109 trivial. 2 not checked. [2021-12-18 00:10:23,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:10:24,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081159452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:10:24,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:10:24,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 50] total 79 [2021-12-18 00:10:24,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543547077] [2021-12-18 00:10:24,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:10:24,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 00:10:24,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:10:24,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 00:10:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=8108, Unknown=106, NotChecked=182, Total=8742 [2021-12-18 00:10:24,954 INFO L87 Difference]: Start difference. First operand 1378 states and 1615 transitions. Second operand has 79 states, 71 states have (on average 2.464788732394366) internal successors, (175), 66 states have internal predecessors, (175), 23 states have call successors, (47), 9 states have call predecessors, (47), 17 states have return successors, (46), 24 states have call predecessors, (46), 22 states have call successors, (46) Killed by 15