./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_from_cursor_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_init_copy_from_cursor_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 4de10993869e21f48bb81ae95b5cdb54403a1e14d61aac1da11f58576220ef55 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:31:38,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:31:38,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:31:38,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:31:38,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:31:38,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:31:38,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:31:38,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:31:38,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:31:38,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:31:38,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:31:38,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:31:38,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:31:38,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:31:38,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:31:38,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:31:38,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:31:38,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:31:38,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:31:38,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:31:38,106 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:31:38,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:31:38,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:31:38,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:31:38,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:31:38,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:31:38,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:31:38,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:31:38,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:31:38,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:31:38,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:31:38,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:31:38,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:31:38,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:31:38,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:31:38,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:31:38,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:31:38,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:31:38,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:31:38,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:31:38,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:31:38,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:31:38,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 09:31:38,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:31:38,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:31:38,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:31:38,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:31:38,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:31:38,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:31:38,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:31:38,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:31:38,173 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:31:38,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:31:38,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:31:38,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:31:38,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:31:38,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:31:38,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:31:38,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:31:38,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:31:38,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:31:38,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:31:38,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:31:38,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:31:38,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:31:38,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:31:38,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:31:38,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:31:38,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:31:38,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:31:38,178 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:31:38,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:31:38,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:31:38,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de10993869e21f48bb81ae95b5cdb54403a1e14d61aac1da11f58576220ef55 [2022-07-21 09:31:38,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:31:38,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:31:38,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:31:38,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:31:38,537 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:31:38,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_from_cursor_harness.i [2022-07-21 09:31:38,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5046c62/a6b572ad20df499da10d06e043997640/FLAG9ced394c7 [2022-07-21 09:31:39,265 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:31:39,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_from_cursor_harness.i [2022-07-21 09:31:39,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5046c62/a6b572ad20df499da10d06e043997640/FLAG9ced394c7 [2022-07-21 09:31:39,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5046c62/a6b572ad20df499da10d06e043997640 [2022-07-21 09:31:39,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:31:39,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:31:39,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:31:39,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:31:39,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:31:39,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:31:39" (1/1) ... [2022-07-21 09:31:39,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7901c5eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:39, skipping insertion in model container [2022-07-21 09:31:39,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:31:39" (1/1) ... [2022-07-21 09:31:39,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:31:39,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:31:39,939 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_init_copy_from_cursor_harness.i[4508,4521] [2022-07-21 09:31:39,946 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_init_copy_from_cursor_harness.i[4568,4581] [2022-07-21 09:31:41,176 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,178 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,179 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,180 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,181 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,203 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,204 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,207 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,208 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,578 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:31:41,579 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:31:41,580 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:31:41,581 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:31:41,582 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:31:41,583 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:31:41,583 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:31:41,584 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:31:41,584 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:31:41,585 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:31:41,729 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:31:41,807 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,807 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:31:41,919 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:31:41,929 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_init_copy_from_cursor_harness.i[4508,4521] [2022-07-21 09:31:41,929 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_init_copy_from_cursor_harness.i[4568,4581] [2022-07-21 09:31:41,964 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,965 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,965 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,966 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,966 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,971 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,972 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,972 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:41,973 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:42,010 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:31:42,011 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:31:42,011 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:31:42,012 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:31:42,012 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:31:42,013 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:31:42,013 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:31:42,014 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:31:42,014 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:31:42,014 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:31:42,045 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:31:42,111 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:42,113 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:42,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:31:42,444 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:31:42,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42 WrapperNode [2022-07-21 09:31:42,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:31:42,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:31:42,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:31:42,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:31:42,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,667 INFO L137 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 897 [2022-07-21 09:31:42,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:31:42,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:31:42,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:31:42,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:31:42,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:31:42,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:31:42,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:31:42,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:31:42,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (1/1) ... [2022-07-21 09:31:42,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:31:42,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:42,805 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) [2022-07-21 09:31:42,827 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 [2022-07-21 09:31:42,844 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-21 09:31:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-21 09:31:42,844 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-07-21 09:31:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-07-21 09:31:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:31:42,845 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-21 09:31:42,845 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-21 09:31:42,846 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-07-21 09:31:42,846 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-07-21 09:31:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:31:42,847 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-21 09:31:42,847 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-21 09:31:42,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 09:31:42,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 09:31:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:31:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:31:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 09:31:42,849 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2022-07-21 09:31:42,850 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2022-07-21 09:31:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:31:42,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:31:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-21 09:31:42,850 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-21 09:31:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-07-21 09:31:42,851 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-07-21 09:31:42,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-21 09:31:42,851 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-21 09:31:42,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 09:31:42,852 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 09:31:42,852 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2022-07-21 09:31:42,853 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2022-07-21 09:31:42,853 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-07-21 09:31:42,853 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-07-21 09:31:42,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:31:42,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 09:31:42,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 09:31:42,853 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-21 09:31:42,854 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-21 09:31:42,854 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-21 09:31:42,854 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-21 09:31:42,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:31:42,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:31:43,156 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:31:43,158 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:31:44,201 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:31:44,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:31:44,213 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-21 09:31:44,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:31:44 BoogieIcfgContainer [2022-07-21 09:31:44,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:31:44,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:31:44,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:31:44,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:31:44,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:31:39" (1/3) ... [2022-07-21 09:31:44,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b8193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:31:44, skipping insertion in model container [2022-07-21 09:31:44,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:42" (2/3) ... [2022-07-21 09:31:44,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b8193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:31:44, skipping insertion in model container [2022-07-21 09:31:44,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:31:44" (3/3) ... [2022-07-21 09:31:44,225 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_copy_from_cursor_harness.i [2022-07-21 09:31:44,238 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:31:44,239 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:31:44,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:31:44,326 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f4f33f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5a185fd6 [2022-07-21 09:31:44,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 09:31:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 117 states have (on average 1.264957264957265) internal successors, (148), 117 states have internal predecessors, (148), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-07-21 09:31:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 09:31:44,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:44,348 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:44,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1193477456, now seen corresponding path program 1 times [2022-07-21 09:31:44,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387264078] [2022-07-21 09:31:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:44,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:44,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:44,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 09:31:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 09:31:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:31:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:31:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:31:45,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387264078] [2022-07-21 09:31:45,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387264078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:45,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:45,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:31:45,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745354106] [2022-07-21 09:31:45,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:45,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:31:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:31:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:31:45,110 INFO L87 Difference]: Start difference. First operand has 171 states, 117 states have (on average 1.264957264957265) internal successors, (148), 117 states have internal predecessors, (148), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:45,156 INFO L93 Difference]: Finished difference Result 338 states and 472 transitions. [2022-07-21 09:31:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:31:45,158 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-07-21 09:31:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:45,168 INFO L225 Difference]: With dead ends: 338 [2022-07-21 09:31:45,169 INFO L226 Difference]: Without dead ends: 164 [2022-07-21 09:31:45,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:31:45,181 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:45,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:31:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-21 09:31:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-07-21 09:31:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 110 states have internal predecessors, (132), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-21 09:31:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 209 transitions. [2022-07-21 09:31:45,258 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 209 transitions. Word has length 61 [2022-07-21 09:31:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:45,259 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 209 transitions. [2022-07-21 09:31:45,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 209 transitions. [2022-07-21 09:31:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 09:31:45,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:45,270 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 09:31:45,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:31:45,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -148092610, now seen corresponding path program 1 times [2022-07-21 09:31:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:45,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219002548] [2022-07-21 09:31:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:45,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 09:31:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 09:31:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:31:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:31:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 09:31:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:31:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 09:31:45,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219002548] [2022-07-21 09:31:45,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219002548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317439867] [2022-07-21 09:31:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:45,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:45,707 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) [2022-07-21 09:31:45,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:31:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 09:31:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 09:31:46,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:46,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317439867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:46,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:46,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-07-21 09:31:46,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610364732] [2022-07-21 09:31:46,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:46,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:31:46,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:46,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:31:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:31:46,357 INFO L87 Difference]: Start difference. First operand 164 states and 209 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:46,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:46,428 INFO L93 Difference]: Finished difference Result 229 states and 291 transitions. [2022-07-21 09:31:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:31:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 68 [2022-07-21 09:31:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:46,436 INFO L225 Difference]: With dead ends: 229 [2022-07-21 09:31:46,437 INFO L226 Difference]: Without dead ends: 162 [2022-07-21 09:31:46,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:31:46,439 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:46,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1024 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:31:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-21 09:31:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-07-21 09:31:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 109 states have internal predecessors, (129), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 09:31:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-07-21 09:31:46,451 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 68 [2022-07-21 09:31:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:46,453 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-07-21 09:31:46,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-07-21 09:31:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 09:31:46,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:46,455 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 09:31:46,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:46,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:46,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 844833533, now seen corresponding path program 1 times [2022-07-21 09:31:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:46,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113416633] [2022-07-21 09:31:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 09:31:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 09:31:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:31:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:31:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:46,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:31:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:47,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 09:31:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 09:31:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:47,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113416633] [2022-07-21 09:31:47,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113416633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:47,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905602355] [2022-07-21 09:31:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:47,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:47,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:47,032 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) [2022-07-21 09:31:47,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:31:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:47,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:31:47,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 09:31:47,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:47,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905602355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:47,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:47,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-07-21 09:31:47,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146668371] [2022-07-21 09:31:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:47,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:31:47,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:31:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:31:47,643 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:47,832 INFO L93 Difference]: Finished difference Result 232 states and 293 transitions. [2022-07-21 09:31:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:31:47,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 74 [2022-07-21 09:31:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:47,836 INFO L225 Difference]: With dead ends: 232 [2022-07-21 09:31:47,836 INFO L226 Difference]: Without dead ends: 162 [2022-07-21 09:31:47,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:31:47,840 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 248 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:47,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 605 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:31:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-21 09:31:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-07-21 09:31:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 109 states have internal predecessors, (128), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 09:31:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-07-21 09:31:47,874 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 74 [2022-07-21 09:31:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:47,875 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-07-21 09:31:47,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-07-21 09:31:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 09:31:47,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:47,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 09:31:47,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:48,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-21 09:31:48,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1064456392, now seen corresponding path program 1 times [2022-07-21 09:31:48,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890445720] [2022-07-21 09:31:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:48,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 09:31:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 09:31:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:31:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:31:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:31:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 09:31:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 09:31:48,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890445720] [2022-07-21 09:31:48,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890445720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307424120] [2022-07-21 09:31:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:48,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:48,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:48,377 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) [2022-07-21 09:31:48,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:31:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:31:48,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:31:48,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:48,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307424120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:48,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:48,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-07-21 09:31:48,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597491492] [2022-07-21 09:31:48,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:31:48,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:31:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:31:48,993 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:49,181 INFO L93 Difference]: Finished difference Result 315 states and 394 transitions. [2022-07-21 09:31:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:31:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 80 [2022-07-21 09:31:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:49,185 INFO L225 Difference]: With dead ends: 315 [2022-07-21 09:31:49,185 INFO L226 Difference]: Without dead ends: 165 [2022-07-21 09:31:49,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:31:49,186 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 225 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:49,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 626 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:31:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-21 09:31:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-21 09:31:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 112 states have internal predecessors, (130), 38 states have call successors, (38), 15 states have call predecessors, (38), 16 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-07-21 09:31:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 206 transitions. [2022-07-21 09:31:49,198 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 206 transitions. Word has length 80 [2022-07-21 09:31:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:49,199 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 206 transitions. [2022-07-21 09:31:49,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 206 transitions. [2022-07-21 09:31:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 09:31:49,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:49,201 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 09:31:49,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:49,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:49,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1640139853, now seen corresponding path program 1 times [2022-07-21 09:31:49,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949803577] [2022-07-21 09:31:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:49,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:31:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-21 09:31:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 09:31:49,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949803577] [2022-07-21 09:31:49,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949803577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:49,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:49,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:31:49,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536454440] [2022-07-21 09:31:49,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:49,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:31:49,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:31:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:31:49,728 INFO L87 Difference]: Start difference. First operand 165 states and 206 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:50,198 INFO L93 Difference]: Finished difference Result 321 states and 394 transitions. [2022-07-21 09:31:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:31:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 82 [2022-07-21 09:31:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:50,200 INFO L225 Difference]: With dead ends: 321 [2022-07-21 09:31:50,200 INFO L226 Difference]: Without dead ends: 172 [2022-07-21 09:31:50,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:31:50,202 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 119 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:50,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 330 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:31:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-21 09:31:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2022-07-21 09:31:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 109 states have internal predecessors, (127), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 09:31:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-07-21 09:31:50,212 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 82 [2022-07-21 09:31:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-07-21 09:31:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-07-21 09:31:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 09:31:50,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:50,215 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:50,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:31:50,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -495240856, now seen corresponding path program 1 times [2022-07-21 09:31:50,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740112744] [2022-07-21 09:31:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:50,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:31:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 09:31:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:31:50,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:50,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740112744] [2022-07-21 09:31:50,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740112744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:50,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:50,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:31:50,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327169398] [2022-07-21 09:31:50,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:50,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:31:50,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:31:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:31:50,483 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:51,049 INFO L93 Difference]: Finished difference Result 290 states and 370 transitions. [2022-07-21 09:31:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:31:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2022-07-21 09:31:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:51,051 INFO L225 Difference]: With dead ends: 290 [2022-07-21 09:31:51,051 INFO L226 Difference]: Without dead ends: 203 [2022-07-21 09:31:51,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:31:51,053 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 103 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:51,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 392 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:31:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-21 09:31:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2022-07-21 09:31:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 111 states have internal predecessors, (129), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 09:31:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 204 transitions. [2022-07-21 09:31:51,064 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 204 transitions. Word has length 84 [2022-07-21 09:31:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:51,065 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 204 transitions. [2022-07-21 09:31:51,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 204 transitions. [2022-07-21 09:31:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 09:31:51,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:51,066 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:51,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:31:51,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2110782698, now seen corresponding path program 1 times [2022-07-21 09:31:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:51,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596315162] [2022-07-21 09:31:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:31:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 09:31:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:31:51,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596315162] [2022-07-21 09:31:51,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596315162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:51,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:51,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:31:51,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182567443] [2022-07-21 09:31:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:51,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:31:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:31:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:31:51,465 INFO L87 Difference]: Start difference. First operand 164 states and 204 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:31:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:52,135 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2022-07-21 09:31:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:31:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 84 [2022-07-21 09:31:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:52,137 INFO L225 Difference]: With dead ends: 186 [2022-07-21 09:31:52,137 INFO L226 Difference]: Without dead ends: 184 [2022-07-21 09:31:52,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:31:52,138 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 112 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:52,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 671 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:31:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-21 09:31:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 173. [2022-07-21 09:31:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 39 states have call successors, (39), 16 states have call predecessors, (39), 17 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-21 09:31:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 214 transitions. [2022-07-21 09:31:52,152 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 214 transitions. Word has length 84 [2022-07-21 09:31:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:52,152 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 214 transitions. [2022-07-21 09:31:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:31:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 214 transitions. [2022-07-21 09:31:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 09:31:52,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:52,155 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:31:52,155 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:52,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1398941774, now seen corresponding path program 1 times [2022-07-21 09:31:52,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:52,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20229442] [2022-07-21 09:31:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:31:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-21 09:31:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:31:52,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:52,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20229442] [2022-07-21 09:31:52,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20229442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:52,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:52,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:31:52,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628996104] [2022-07-21 09:31:52,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:31:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:31:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:31:52,517 INFO L87 Difference]: Start difference. First operand 173 states and 214 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:52,900 INFO L93 Difference]: Finished difference Result 330 states and 403 transitions. [2022-07-21 09:31:52,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:31:52,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2022-07-21 09:31:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:52,903 INFO L225 Difference]: With dead ends: 330 [2022-07-21 09:31:52,903 INFO L226 Difference]: Without dead ends: 181 [2022-07-21 09:31:52,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:31:52,904 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 88 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:52,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 362 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:31:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-21 09:31:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2022-07-21 09:31:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 119 states have internal predecessors, (136), 39 states have call successors, (39), 16 states have call predecessors, (39), 17 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-21 09:31:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-07-21 09:31:52,916 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 88 [2022-07-21 09:31:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:52,917 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-07-21 09:31:52,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 09:31:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-07-21 09:31:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:31:52,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:52,918 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:52,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:31:52,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1930196412, now seen corresponding path program 1 times [2022-07-21 09:31:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:52,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77723479] [2022-07-21 09:31:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:31:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:31:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:31:53,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77723479] [2022-07-21 09:31:53,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77723479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548102860] [2022-07-21 09:31:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:53,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:53,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:53,255 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) [2022-07-21 09:31:53,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:31:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2651 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:31:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:31:53,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:53,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548102860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:53,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:53,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-07-21 09:31:53,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980562821] [2022-07-21 09:31:53,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:31:53,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:31:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:31:53,808 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:31:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:53,962 INFO L93 Difference]: Finished difference Result 263 states and 329 transitions. [2022-07-21 09:31:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:31:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 89 [2022-07-21 09:31:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:53,964 INFO L225 Difference]: With dead ends: 263 [2022-07-21 09:31:53,964 INFO L226 Difference]: Without dead ends: 192 [2022-07-21 09:31:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:31:53,965 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 40 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:53,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 722 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-21 09:31:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-21 09:31:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 179. [2022-07-21 09:31:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 122 states have (on average 1.1721311475409837) internal successors, (143), 124 states have internal predecessors, (143), 39 states have call successors, (39), 16 states have call predecessors, (39), 17 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-21 09:31:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 222 transitions. [2022-07-21 09:31:53,977 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 222 transitions. Word has length 89 [2022-07-21 09:31:53,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:53,978 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 222 transitions. [2022-07-21 09:31:53,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:31:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 222 transitions. [2022-07-21 09:31:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:31:53,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:53,979 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:54,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:54,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:54,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2106605446, now seen corresponding path program 1 times [2022-07-21 09:31:54,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:54,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742889715] [2022-07-21 09:31:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:54,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:31:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:31:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:31:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742889715] [2022-07-21 09:31:54,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742889715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833508334] [2022-07-21 09:31:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:54,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:54,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:54,580 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) [2022-07-21 09:31:54,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:31:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 09:31:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:55,187 INFO L390 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 [2022-07-21 09:31:55,194 INFO L390 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 [2022-07-21 09:31:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,249 INFO L390 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 0 case distinctions, treesize of input 31 treesize of output 38 [2022-07-21 09:31:55,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:55,265 INFO L390 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 0 case distinctions, treesize of input 31 treesize of output 38 [2022-07-21 09:31:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:31:55,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:55,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833508334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:55,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:55,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2022-07-21 09:31:55,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325923812] [2022-07-21 09:31:55,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:55,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:31:55,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:31:55,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:31:55,624 INFO L87 Difference]: Start difference. First operand 179 states and 222 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:55,790 INFO L93 Difference]: Finished difference Result 289 states and 364 transitions. [2022-07-21 09:31:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:31:55,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2022-07-21 09:31:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:55,793 INFO L225 Difference]: With dead ends: 289 [2022-07-21 09:31:55,793 INFO L226 Difference]: Without dead ends: 207 [2022-07-21 09:31:55,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:31:55,794 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 85 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:55,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1065 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 56 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-07-21 09:31:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-21 09:31:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-07-21 09:31:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 150 states have internal predecessors, (177), 40 states have call successors, (40), 17 states have call predecessors, (40), 18 states have return successors, (43), 38 states have call predecessors, (43), 39 states have call successors, (43) [2022-07-21 09:31:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 260 transitions. [2022-07-21 09:31:55,807 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 260 transitions. Word has length 89 [2022-07-21 09:31:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:55,807 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 260 transitions. [2022-07-21 09:31:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 260 transitions. [2022-07-21 09:31:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:31:55,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:55,809 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:55,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 09:31:56,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash 908498172, now seen corresponding path program 1 times [2022-07-21 09:31:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392007867] [2022-07-21 09:31:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:31:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:31:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:31:56,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:56,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392007867] [2022-07-21 09:31:56,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392007867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:56,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916908507] [2022-07-21 09:31:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:56,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:56,340 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) [2022-07-21 09:31:56,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:31:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 09:31:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:56,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:56,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:56,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:56,983 INFO L356 Elim1Store]: treesize reduction 87, result has 23.0 percent of original size [2022-07-21 09:31:56,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 57 [2022-07-21 09:31:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:31:57,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916908507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:57,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:57,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2022-07-21 09:31:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483043910] [2022-07-21 09:31:57,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:31:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:31:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:31:57,279 INFO L87 Difference]: Start difference. First operand 206 states and 260 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:57,654 INFO L93 Difference]: Finished difference Result 339 states and 433 transitions. [2022-07-21 09:31:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:31:57,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2022-07-21 09:31:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:57,657 INFO L225 Difference]: With dead ends: 339 [2022-07-21 09:31:57,657 INFO L226 Difference]: Without dead ends: 245 [2022-07-21 09:31:57,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:31:57,658 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 87 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:57,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1200 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 170 Invalid, 0 Unknown, 181 Unchecked, 0.3s Time] [2022-07-21 09:31:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-21 09:31:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2022-07-21 09:31:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 157 states have (on average 1.2038216560509554) internal successors, (189), 160 states have internal predecessors, (189), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (45), 38 states have call predecessors, (45), 40 states have call successors, (45) [2022-07-21 09:31:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2022-07-21 09:31:57,690 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 89 [2022-07-21 09:31:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:57,691 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2022-07-21 09:31:57,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2022-07-21 09:31:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:31:57,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:57,693 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:57,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:57,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:57,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -938015168, now seen corresponding path program 1 times [2022-07-21 09:31:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:57,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681603190] [2022-07-21 09:31:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:31:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:31:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:31:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:31:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:31:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:31:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:31:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:31:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:31:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:31:58,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681603190] [2022-07-21 09:31:58,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681603190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871023923] [2022-07-21 09:31:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:58,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:58,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:58,211 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) [2022-07-21 09:31:58,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:31:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 09:31:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:31:58,871 INFO L356 Elim1Store]: treesize reduction 87, result has 23.0 percent of original size [2022-07-21 09:31:58,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 57 [2022-07-21 09:31:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:31:59,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:59,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871023923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:59,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:59,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2022-07-21 09:31:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565398165] [2022-07-21 09:31:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:31:59,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:31:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:31:59,357 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:59,780 INFO L93 Difference]: Finished difference Result 349 states and 448 transitions. [2022-07-21 09:31:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:31:59,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2022-07-21 09:31:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:59,783 INFO L225 Difference]: With dead ends: 349 [2022-07-21 09:31:59,784 INFO L226 Difference]: Without dead ends: 268 [2022-07-21 09:31:59,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:31:59,787 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 101 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:59,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1676 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 196 Invalid, 0 Unknown, 398 Unchecked, 0.3s Time] [2022-07-21 09:31:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-21 09:31:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2022-07-21 09:31:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 181 states have internal predecessors, (213), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (49), 38 states have call predecessors, (49), 40 states have call successors, (49) [2022-07-21 09:31:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 303 transitions. [2022-07-21 09:31:59,817 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 303 transitions. Word has length 89 [2022-07-21 09:31:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:59,818 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 303 transitions. [2022-07-21 09:31:59,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:31:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 303 transitions. [2022-07-21 09:31:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:31:59,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:59,821 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:31:59,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:00,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash -679849730, now seen corresponding path program 1 times [2022-07-21 09:32:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:00,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161520942] [2022-07-21 09:32:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:32:00,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:00,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161520942] [2022-07-21 09:32:00,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161520942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:00,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646461545] [2022-07-21 09:32:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:00,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:00,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:00,391 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) [2022-07-21 09:32:00,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:32:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:32:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:32:00,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:00,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646461545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:00,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:00,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-07-21 09:32:00,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264678631] [2022-07-21 09:32:00,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:00,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:32:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:32:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:00,948 INFO L87 Difference]: Start difference. First operand 238 states and 303 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:01,109 INFO L93 Difference]: Finished difference Result 318 states and 404 transitions. [2022-07-21 09:32:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:32:01,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 89 [2022-07-21 09:32:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:01,111 INFO L225 Difference]: With dead ends: 318 [2022-07-21 09:32:01,111 INFO L226 Difference]: Without dead ends: 230 [2022-07-21 09:32:01,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:01,119 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 14 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:01,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 729 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-07-21 09:32:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-21 09:32:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-07-21 09:32:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 173 states have internal predecessors, (200), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (49), 38 states have call predecessors, (49), 40 states have call successors, (49) [2022-07-21 09:32:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 290 transitions. [2022-07-21 09:32:01,139 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 290 transitions. Word has length 89 [2022-07-21 09:32:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:01,140 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 290 transitions. [2022-07-21 09:32:01,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 290 transitions. [2022-07-21 09:32:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:01,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:01,142 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:01,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:01,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:32:01,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 733091521, now seen corresponding path program 1 times [2022-07-21 09:32:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40370012] [2022-07-21 09:32:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:32:01,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40370012] [2022-07-21 09:32:01,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40370012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:01,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:01,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:32:01,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92138940] [2022-07-21 09:32:01,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:01,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:32:01,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:32:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:32:01,548 INFO L87 Difference]: Start difference. First operand 230 states and 290 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:01,891 INFO L93 Difference]: Finished difference Result 330 states and 413 transitions. [2022-07-21 09:32:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:32:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 91 [2022-07-21 09:32:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:01,893 INFO L225 Difference]: With dead ends: 330 [2022-07-21 09:32:01,893 INFO L226 Difference]: Without dead ends: 241 [2022-07-21 09:32:01,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:32:01,894 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 95 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:01,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 367 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-21 09:32:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 228. [2022-07-21 09:32:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 171 states have internal predecessors, (195), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (49), 38 states have call predecessors, (49), 40 states have call successors, (49) [2022-07-21 09:32:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 285 transitions. [2022-07-21 09:32:01,927 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 285 transitions. Word has length 91 [2022-07-21 09:32:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:01,927 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 285 transitions. [2022-07-21 09:32:01,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 285 transitions. [2022-07-21 09:32:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:01,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:01,929 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:01,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:32:01,930 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash 55265029, now seen corresponding path program 1 times [2022-07-21 09:32:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:01,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927148412] [2022-07-21 09:32:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:32:02,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927148412] [2022-07-21 09:32:02,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927148412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:02,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:02,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:32:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94581092] [2022-07-21 09:32:02,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:02,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:32:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:32:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:32:02,126 INFO L87 Difference]: Start difference. First operand 228 states and 285 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:02,509 INFO L93 Difference]: Finished difference Result 344 states and 427 transitions. [2022-07-21 09:32:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:32:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 91 [2022-07-21 09:32:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:02,511 INFO L225 Difference]: With dead ends: 344 [2022-07-21 09:32:02,511 INFO L226 Difference]: Without dead ends: 242 [2022-07-21 09:32:02,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:32:02,512 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 122 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:02,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 372 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-21 09:32:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2022-07-21 09:32:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 160 states have (on average 1.15625) internal successors, (185), 165 states have internal predecessors, (185), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (48), 38 states have call predecessors, (48), 40 states have call successors, (48) [2022-07-21 09:32:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 274 transitions. [2022-07-21 09:32:02,526 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 274 transitions. Word has length 91 [2022-07-21 09:32:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:02,527 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 274 transitions. [2022-07-21 09:32:02,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 274 transitions. [2022-07-21 09:32:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:02,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:02,528 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:02,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:32:02,529 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2060819845, now seen corresponding path program 1 times [2022-07-21 09:32:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:02,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467445931] [2022-07-21 09:32:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 09:32:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:02,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467445931] [2022-07-21 09:32:02,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467445931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:02,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:02,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:32:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461824665] [2022-07-21 09:32:02,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:02,815 INFO L87 Difference]: Start difference. First operand 222 states and 274 transitions. Second operand has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:03,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:03,588 INFO L93 Difference]: Finished difference Result 243 states and 299 transitions. [2022-07-21 09:32:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:32:03,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 91 [2022-07-21 09:32:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:03,591 INFO L225 Difference]: With dead ends: 243 [2022-07-21 09:32:03,591 INFO L226 Difference]: Without dead ends: 241 [2022-07-21 09:32:03,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:32:03,592 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 116 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:03,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 830 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-21 09:32:03,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 224. [2022-07-21 09:32:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 162 states have (on average 1.154320987654321) internal successors, (187), 167 states have internal predecessors, (187), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (48), 38 states have call predecessors, (48), 40 states have call successors, (48) [2022-07-21 09:32:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 276 transitions. [2022-07-21 09:32:03,606 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 276 transitions. Word has length 91 [2022-07-21 09:32:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:03,606 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 276 transitions. [2022-07-21 09:32:03,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-07-21 09:32:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 276 transitions. [2022-07-21 09:32:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:03,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:03,608 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:03,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 09:32:03,608 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:03,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1533082873, now seen corresponding path program 1 times [2022-07-21 09:32:03,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:03,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541031395] [2022-07-21 09:32:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:32:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:03,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541031395] [2022-07-21 09:32:03,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541031395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:03,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360548407] [2022-07-21 09:32:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:03,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:03,900 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) [2022-07-21 09:32:03,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:32:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 2653 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 09:32:04,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:04,451 INFO L390 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 [2022-07-21 09:32:04,501 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1770 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1770) |c_#memory_int|)) is different from true [2022-07-21 09:32:04,525 INFO L390 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 [2022-07-21 09:32:04,598 INFO L390 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 [2022-07-21 09:32:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:04,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:04,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:04,672 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-07-21 09:32:04,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 93 [2022-07-21 09:32:04,680 INFO L390 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 11 treesize of output 9 [2022-07-21 09:32:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:04,730 INFO L390 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 23 treesize of output 17 [2022-07-21 09:32:04,763 INFO L390 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 0 case distinctions, treesize of input 46 treesize of output 32 [2022-07-21 09:32:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:04,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-07-21 09:32:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 1 not checked. [2022-07-21 09:32:05,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:06,315 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1774 (Array Int Int)) (aux_div_v_ArrVal_1773_40 Int) (aux_mod_v_ArrVal_1773_40 Int) (v_ArrVal_1771 (Array Int Int)) (|ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~dest#1.base| Int) (v_ArrVal_1775 Int)) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~dest#1.base| v_ArrVal_1774) |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base|) |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.offset|))) (or (= (mod .cse0 18446744073709551616) 0) (< 0 (mod (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~dest#1.base| (store (store (store v_ArrVal_1771 |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~dest#1.offset| (+ (* 18446744073709551616 aux_div_v_ArrVal_1773_40) aux_mod_v_ArrVal_1773_40)) (+ |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~dest#1.offset| 16) .cse0) (+ |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~dest#1.offset| 24) v_ArrVal_1775)) |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base|) |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.offset|) 18446744073709551616)) (not (= (mod (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~dest#1.base| v_ArrVal_1771) |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base|) |c_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.offset|) 18446744073709551616) 0)) (= aux_mod_v_ArrVal_1773_40 0) (> 0 aux_mod_v_ArrVal_1773_40) (>= aux_mod_v_ArrVal_1773_40 18446744073709551616)))) is different from false [2022-07-21 09:32:06,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360548407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:06,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:06,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 20 [2022-07-21 09:32:06,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050077573] [2022-07-21 09:32:06,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:06,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:32:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:32:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=712, Unknown=5, NotChecked=110, Total=930 [2022-07-21 09:32:06,321 INFO L87 Difference]: Start difference. First operand 224 states and 276 transitions. Second operand has 20 states, 19 states have (on average 4.894736842105263) internal successors, (93), 18 states have internal predecessors, (93), 5 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) [2022-07-21 09:32:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:07,189 INFO L93 Difference]: Finished difference Result 440 states and 536 transitions. [2022-07-21 09:32:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 09:32:07,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.894736842105263) internal successors, (93), 18 states have internal predecessors, (93), 5 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) Word has length 91 [2022-07-21 09:32:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:07,191 INFO L225 Difference]: With dead ends: 440 [2022-07-21 09:32:07,191 INFO L226 Difference]: Without dead ends: 235 [2022-07-21 09:32:07,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=1234, Unknown=7, NotChecked=146, Total=1560 [2022-07-21 09:32:07,193 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 106 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 864 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:07,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 806 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 723 Invalid, 0 Unknown, 864 Unchecked, 0.6s Time] [2022-07-21 09:32:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-21 09:32:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 226. [2022-07-21 09:32:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 164 states have (on average 1.1524390243902438) internal successors, (189), 169 states have internal predecessors, (189), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (47), 38 states have call predecessors, (47), 40 states have call successors, (47) [2022-07-21 09:32:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 277 transitions. [2022-07-21 09:32:07,207 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 277 transitions. Word has length 91 [2022-07-21 09:32:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:07,207 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 277 transitions. [2022-07-21 09:32:07,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.894736842105263) internal successors, (93), 18 states have internal predecessors, (93), 5 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) [2022-07-21 09:32:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 277 transitions. [2022-07-21 09:32:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-21 09:32:07,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:07,210 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 09:32:07,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:07,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:32:07,425 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:07,425 INFO L85 PathProgramCache]: Analyzing trace with hash -151627689, now seen corresponding path program 1 times [2022-07-21 09:32:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:07,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487951914] [2022-07-21 09:32:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:07,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-21 09:32:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:32:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-21 09:32:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 09:32:07,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:07,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487951914] [2022-07-21 09:32:07,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487951914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:07,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:07,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:32:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390107244] [2022-07-21 09:32:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:07,742 INFO L87 Difference]: Start difference. First operand 226 states and 277 transitions. Second operand has 9 states, 8 states have (on average 7.375) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:32:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:08,340 INFO L93 Difference]: Finished difference Result 245 states and 300 transitions. [2022-07-21 09:32:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:32:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 106 [2022-07-21 09:32:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:08,342 INFO L225 Difference]: With dead ends: 245 [2022-07-21 09:32:08,343 INFO L226 Difference]: Without dead ends: 243 [2022-07-21 09:32:08,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:32:08,343 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 107 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:08,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 675 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:32:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-21 09:32:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2022-07-21 09:32:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 170 states have (on average 1.1470588235294117) internal successors, (195), 176 states have internal predecessors, (195), 42 states have call successors, (42), 19 states have call predecessors, (42), 22 states have return successors, (52), 39 states have call predecessors, (52), 41 states have call successors, (52) [2022-07-21 09:32:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 289 transitions. [2022-07-21 09:32:08,356 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 289 transitions. Word has length 106 [2022-07-21 09:32:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:08,357 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 289 transitions. [2022-07-21 09:32:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:32:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 289 transitions. [2022-07-21 09:32:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-21 09:32:08,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:08,359 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 09:32:08,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:32:08,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:08,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1243987805, now seen corresponding path program 1 times [2022-07-21 09:32:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:08,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162960454] [2022-07-21 09:32:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-21 09:32:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:32:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-21 09:32:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:32:08,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:08,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162960454] [2022-07-21 09:32:08,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162960454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:08,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440438995] [2022-07-21 09:32:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:08,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:08,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:08,700 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) [2022-07-21 09:32:08,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:32:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:32:09,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:09,369 INFO L390 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 [2022-07-21 09:32:09,372 INFO L390 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 [2022-07-21 09:32:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 09:32:09,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:10,527 INFO L390 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 20 [2022-07-21 09:32:10,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:10,545 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:32:10,546 INFO L390 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 27 treesize of output 31 [2022-07-21 09:32:10,555 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:32:10,555 INFO L390 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 23 treesize of output 27 [2022-07-21 09:32:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 09:32:10,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440438995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:10,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:10,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 13] total 29 [2022-07-21 09:32:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417100985] [2022-07-21 09:32:10,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:10,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 09:32:10,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 09:32:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-07-21 09:32:10,655 INFO L87 Difference]: Start difference. First operand 235 states and 289 transitions. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 28 states have internal predecessors, (148), 8 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 8 states have call successors, (31) [2022-07-21 09:32:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:13,085 INFO L93 Difference]: Finished difference Result 531 states and 657 transitions. [2022-07-21 09:32:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 09:32:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 28 states have internal predecessors, (148), 8 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 8 states have call successors, (31) Word has length 110 [2022-07-21 09:32:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:13,087 INFO L225 Difference]: With dead ends: 531 [2022-07-21 09:32:13,088 INFO L226 Difference]: Without dead ends: 314 [2022-07-21 09:32:13,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 224 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 09:32:13,090 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 274 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 3303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 657 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:13,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1790 Invalid, 3303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2505 Invalid, 0 Unknown, 657 Unchecked, 1.6s Time] [2022-07-21 09:32:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-21 09:32:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 266. [2022-07-21 09:32:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 196 states have (on average 1.1428571428571428) internal successors, (224), 203 states have internal predecessors, (224), 44 states have call successors, (44), 21 states have call predecessors, (44), 25 states have return successors, (60), 41 states have call predecessors, (60), 43 states have call successors, (60) [2022-07-21 09:32:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 328 transitions. [2022-07-21 09:32:13,106 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 328 transitions. Word has length 110 [2022-07-21 09:32:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:13,106 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 328 transitions. [2022-07-21 09:32:13,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 28 states have internal predecessors, (148), 8 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 8 states have call successors, (31) [2022-07-21 09:32:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 328 transitions. [2022-07-21 09:32:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 09:32:13,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:13,108 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:13,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:13,323 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1605325207, now seen corresponding path program 1 times [2022-07-21 09:32:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:13,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704159924] [2022-07-21 09:32:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:32:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:32:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:32:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:32:13,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704159924] [2022-07-21 09:32:13,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704159924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278422406] [2022-07-21 09:32:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:13,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:13,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:13,698 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) [2022-07-21 09:32:13,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:32:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 2733 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 09:32:14,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 09:32:14,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:15,071 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:32:15,072 INFO L390 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 20 treesize of output 19 [2022-07-21 09:32:15,176 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:32:15,177 INFO L390 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 20 treesize of output 19 [2022-07-21 09:32:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 09:32:15,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278422406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:15,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:15,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 12] total 28 [2022-07-21 09:32:15,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92208422] [2022-07-21 09:32:15,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:15,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:32:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:32:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:32:15,243 INFO L87 Difference]: Start difference. First operand 266 states and 328 transitions. Second operand has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 27 states have internal predecessors, (146), 7 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-07-21 09:32:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:17,846 INFO L93 Difference]: Finished difference Result 608 states and 762 transitions. [2022-07-21 09:32:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:32:17,846 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 27 states have internal predecessors, (146), 7 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) Word has length 111 [2022-07-21 09:32:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:17,848 INFO L225 Difference]: With dead ends: 608 [2022-07-21 09:32:17,848 INFO L226 Difference]: Without dead ends: 355 [2022-07-21 09:32:17,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=337, Invalid=2015, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 09:32:17,850 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 336 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 3858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1084 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:17,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1306 Invalid, 3858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2601 Invalid, 0 Unknown, 1084 Unchecked, 1.7s Time] [2022-07-21 09:32:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-21 09:32:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 302. [2022-07-21 09:32:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 231 states have internal predecessors, (255), 48 states have call successors, (48), 25 states have call predecessors, (48), 29 states have return successors, (76), 45 states have call predecessors, (76), 47 states have call successors, (76) [2022-07-21 09:32:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 379 transitions. [2022-07-21 09:32:17,868 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 379 transitions. Word has length 111 [2022-07-21 09:32:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:17,869 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 379 transitions. [2022-07-21 09:32:17,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 27 states have internal predecessors, (146), 7 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-07-21 09:32:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 379 transitions. [2022-07-21 09:32:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 09:32:17,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:17,871 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-07-21 09:32:17,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:18,090 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash -565160349, now seen corresponding path program 1 times [2022-07-21 09:32:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:18,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983786390] [2022-07-21 09:32:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:18,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-21 09:32:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-21 09:32:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-21 09:32:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:32:18,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983786390] [2022-07-21 09:32:18,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983786390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25907373] [2022-07-21 09:32:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:18,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:18,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:18,446 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) [2022-07-21 09:32:18,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:32:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2754 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 09:32:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:19,153 INFO L390 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 [2022-07-21 09:32:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 09:32:19,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:24,514 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 09:32:24,515 INFO L390 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 69 treesize of output 53 [2022-07-21 09:32:24,547 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-21 09:32:24,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-07-21 09:32:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:32:24,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25907373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:24,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:24,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 15] total 36 [2022-07-21 09:32:24,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121610209] [2022-07-21 09:32:24,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:24,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 09:32:24,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:24,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 09:32:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 09:32:24,771 INFO L87 Difference]: Start difference. First operand 302 states and 379 transitions. Second operand has 36 states, 36 states have (on average 4.305555555555555) internal successors, (155), 35 states have internal predecessors, (155), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 8 states have call successors, (31) [2022-07-21 09:32:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:28,492 INFO L93 Difference]: Finished difference Result 696 states and 911 transitions. [2022-07-21 09:32:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:32:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.305555555555555) internal successors, (155), 35 states have internal predecessors, (155), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 8 states have call successors, (31) Word has length 112 [2022-07-21 09:32:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:28,495 INFO L225 Difference]: With dead ends: 696 [2022-07-21 09:32:28,495 INFO L226 Difference]: Without dead ends: 417 [2022-07-21 09:32:28,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=350, Invalid=3066, Unknown=6, NotChecked=0, Total=3422 [2022-07-21 09:32:28,497 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 369 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 2965 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 4425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1317 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:28,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1575 Invalid, 4425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2965 Invalid, 0 Unknown, 1317 Unchecked, 2.4s Time] [2022-07-21 09:32:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-21 09:32:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 310. [2022-07-21 09:32:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 232 states have (on average 1.1379310344827587) internal successors, (264), 239 states have internal predecessors, (264), 48 states have call successors, (48), 25 states have call predecessors, (48), 29 states have return successors, (76), 45 states have call predecessors, (76), 47 states have call successors, (76) [2022-07-21 09:32:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2022-07-21 09:32:28,519 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 112 [2022-07-21 09:32:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:28,519 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2022-07-21 09:32:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.305555555555555) internal successors, (155), 35 states have internal predecessors, (155), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 8 states have call successors, (31) [2022-07-21 09:32:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2022-07-21 09:32:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-21 09:32:28,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:28,522 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2022-07-21 09:32:28,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:28,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 09:32:28,747 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 389589933, now seen corresponding path program 1 times [2022-07-21 09:32:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:28,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318956994] [2022-07-21 09:32:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:28,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:32:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 09:32:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-21 09:32:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-21 09:32:28,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318956994] [2022-07-21 09:32:28,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318956994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042687343] [2022-07-21 09:32:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:28,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:28,995 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) [2022-07-21 09:32:29,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:32:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:32:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 09:32:29,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:29,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042687343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:29,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:29,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 09:32:29,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434792616] [2022-07-21 09:32:29,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:29,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:32:29,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:32:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:32:29,607 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:32:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:29,639 INFO L93 Difference]: Finished difference Result 396 states and 483 transitions. [2022-07-21 09:32:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2022-07-21 09:32:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:29,641 INFO L225 Difference]: With dead ends: 396 [2022-07-21 09:32:29,642 INFO L226 Difference]: Without dead ends: 280 [2022-07-21 09:32:29,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:32:29,643 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 22 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:29,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 585 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-07-21 09:32:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2022-07-21 09:32:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 205 states have (on average 1.1219512195121952) internal successors, (230), 209 states have internal predecessors, (230), 46 states have call successors, (46), 23 states have call predecessors, (46), 24 states have return successors, (61), 43 states have call predecessors, (61), 45 states have call successors, (61) [2022-07-21 09:32:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2022-07-21 09:32:29,660 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 113 [2022-07-21 09:32:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2022-07-21 09:32:29,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:32:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2022-07-21 09:32:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 09:32:29,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:29,662 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2022-07-21 09:32:29,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:29,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 09:32:29,883 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash -868673934, now seen corresponding path program 1 times [2022-07-21 09:32:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:29,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347355475] [2022-07-21 09:32:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:32:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 09:32:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-21 09:32:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-21 09:32:30,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347355475] [2022-07-21 09:32:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347355475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:30,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:30,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:32:30,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354841061] [2022-07-21 09:32:30,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:30,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:30,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:30,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:30,192 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:32:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:30,904 INFO L93 Difference]: Finished difference Result 291 states and 353 transitions. [2022-07-21 09:32:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:32:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 115 [2022-07-21 09:32:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:30,906 INFO L225 Difference]: With dead ends: 291 [2022-07-21 09:32:30,906 INFO L226 Difference]: Without dead ends: 289 [2022-07-21 09:32:30,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:32:30,907 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 113 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:30,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 833 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-21 09:32:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 276. [2022-07-21 09:32:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 205 states have (on average 1.1219512195121952) internal successors, (230), 209 states have internal predecessors, (230), 46 states have call successors, (46), 23 states have call predecessors, (46), 24 states have return successors, (61), 43 states have call predecessors, (61), 45 states have call successors, (61) [2022-07-21 09:32:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2022-07-21 09:32:30,925 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 115 [2022-07-21 09:32:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:30,925 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2022-07-21 09:32:30,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:32:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2022-07-21 09:32:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 09:32:30,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:30,927 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2022-07-21 09:32:30,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 09:32:30,928 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -167609356, now seen corresponding path program 1 times [2022-07-21 09:32:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:30,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671641293] [2022-07-21 09:32:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:32:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 09:32:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-21 09:32:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:32:31,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671641293] [2022-07-21 09:32:31,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671641293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:31,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811368438] [2022-07-21 09:32:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:31,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:31,312 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) [2022-07-21 09:32:31,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:32:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2783 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 09:32:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 09:32:32,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:32,644 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:32:32,645 INFO L390 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 20 treesize of output 19 [2022-07-21 09:32:32,752 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:32:32,752 INFO L390 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 20 treesize of output 19 [2022-07-21 09:32:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 09:32:32,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811368438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:32,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:32,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 28 [2022-07-21 09:32:32,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509528149] [2022-07-21 09:32:32,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:32,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 09:32:32,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:32,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 09:32:32,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:32:32,816 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand has 28 states, 28 states have (on average 5.535714285714286) internal successors, (155), 27 states have internal predecessors, (155), 7 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-07-21 09:32:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:35,400 INFO L93 Difference]: Finished difference Result 587 states and 720 transitions. [2022-07-21 09:32:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:32:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.535714285714286) internal successors, (155), 27 states have internal predecessors, (155), 7 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) Word has length 115 [2022-07-21 09:32:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:35,402 INFO L225 Difference]: With dead ends: 587 [2022-07-21 09:32:35,403 INFO L226 Difference]: Without dead ends: 334 [2022-07-21 09:32:35,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 09:32:35,405 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 378 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:35,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1389 Invalid, 3466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2884 Invalid, 0 Unknown, 423 Unchecked, 1.9s Time] [2022-07-21 09:32:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-07-21 09:32:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 262. [2022-07-21 09:32:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 192 states have (on average 1.125) internal successors, (216), 196 states have internal predecessors, (216), 46 states have call successors, (46), 22 states have call predecessors, (46), 23 states have return successors, (57), 43 states have call predecessors, (57), 45 states have call successors, (57) [2022-07-21 09:32:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 319 transitions. [2022-07-21 09:32:35,424 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 319 transitions. Word has length 115 [2022-07-21 09:32:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:35,424 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 319 transitions. [2022-07-21 09:32:35,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.535714285714286) internal successors, (155), 27 states have internal predecessors, (155), 7 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-07-21 09:32:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 319 transitions. [2022-07-21 09:32:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-21 09:32:35,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:35,426 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 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, 1] [2022-07-21 09:32:35,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:35,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:35,651 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1981097108, now seen corresponding path program 1 times [2022-07-21 09:32:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:35,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475471095] [2022-07-21 09:32:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:35,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-21 09:32:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 09:32:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-21 09:32:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 09:32:36,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:36,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475471095] [2022-07-21 09:32:36,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475471095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:36,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988437366] [2022-07-21 09:32:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:36,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:36,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:36,096 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) [2022-07-21 09:32:36,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:32:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:36,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2856 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 09:32:36,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:36,849 INFO L390 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 [2022-07-21 09:32:36,855 INFO L390 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 [2022-07-21 09:32:36,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,897 INFO L390 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 0 case distinctions, treesize of input 31 treesize of output 38 [2022-07-21 09:32:36,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:36,907 INFO L390 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 0 case distinctions, treesize of input 31 treesize of output 38 [2022-07-21 09:32:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-21 09:32:37,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:37,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988437366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:37,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:37,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [11] total 23 [2022-07-21 09:32:37,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109707688] [2022-07-21 09:32:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:32:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:32:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:32:37,346 INFO L87 Difference]: Start difference. First operand 262 states and 319 transitions. Second operand has 14 states, 12 states have (on average 5.166666666666667) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-21 09:32:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:37,964 INFO L93 Difference]: Finished difference Result 424 states and 521 transitions. [2022-07-21 09:32:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:32:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.166666666666667) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 122 [2022-07-21 09:32:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:37,965 INFO L225 Difference]: With dead ends: 424 [2022-07-21 09:32:37,966 INFO L226 Difference]: Without dead ends: 324 [2022-07-21 09:32:37,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:32:37,967 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 201 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:37,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 586 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 528 Invalid, 0 Unknown, 572 Unchecked, 0.4s Time] [2022-07-21 09:32:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-21 09:32:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 277. [2022-07-21 09:32:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 208 states have internal predecessors, (230), 48 states have call successors, (48), 23 states have call predecessors, (48), 25 states have return successors, (64), 45 states have call predecessors, (64), 47 states have call successors, (64) [2022-07-21 09:32:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 342 transitions. [2022-07-21 09:32:37,985 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 342 transitions. Word has length 122 [2022-07-21 09:32:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:37,986 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 342 transitions. [2022-07-21 09:32:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.166666666666667) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-21 09:32:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 342 transitions. [2022-07-21 09:32:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-21 09:32:37,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:37,987 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 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, 1] [2022-07-21 09:32:38,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:38,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:38,204 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1034006510, now seen corresponding path program 1 times [2022-07-21 09:32:38,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:38,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002336885] [2022-07-21 09:32:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:38,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-21 09:32:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 09:32:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 09:32:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-21 09:32:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 09:32:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002336885] [2022-07-21 09:32:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002336885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:38,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895775138] [2022-07-21 09:32:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:38,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:38,659 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) [2022-07-21 09:32:38,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:32:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 09:32:39,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:39,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:39,429 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-21 09:32:39,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2022-07-21 09:32:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 09:32:39,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:39,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895775138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:39,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:39,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-07-21 09:32:39,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247281382] [2022-07-21 09:32:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:39,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:32:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:39,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:32:39,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:32:39,462 INFO L87 Difference]: Start difference. First operand 277 states and 342 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-21 09:32:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:39,702 INFO L93 Difference]: Finished difference Result 456 states and 555 transitions. [2022-07-21 09:32:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:32:39,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 122 [2022-07-21 09:32:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:39,704 INFO L225 Difference]: With dead ends: 456 [2022-07-21 09:32:39,704 INFO L226 Difference]: Without dead ends: 275 [2022-07-21 09:32:39,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:32:39,706 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 37 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:39,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 809 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:32:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-21 09:32:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 262. [2022-07-21 09:32:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 192 states have (on average 1.1145833333333333) internal successors, (214), 196 states have internal predecessors, (214), 46 states have call successors, (46), 22 states have call predecessors, (46), 23 states have return successors, (57), 43 states have call predecessors, (57), 45 states have call successors, (57) [2022-07-21 09:32:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 317 transitions. [2022-07-21 09:32:39,723 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 317 transitions. Word has length 122 [2022-07-21 09:32:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:39,723 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 317 transitions. [2022-07-21 09:32:39,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-21 09:32:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 317 transitions. [2022-07-21 09:32:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 09:32:39,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:39,724 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 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] [2022-07-21 09:32:39,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:39,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 09:32:39,931 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -105137170, now seen corresponding path program 1 times [2022-07-21 09:32:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:39,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450036293] [2022-07-21 09:32:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-21 09:32:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-21 09:32:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 09:32:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 09:32:40,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:40,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450036293] [2022-07-21 09:32:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450036293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365827233] [2022-07-21 09:32:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:40,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:40,316 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) [2022-07-21 09:32:40,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:32:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2804 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 09:32:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:40,957 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-21 09:32:40,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-07-21 09:32:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-21 09:32:41,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365827233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:41,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:41,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2022-07-21 09:32:41,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191541933] [2022-07-21 09:32:41,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:41,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:41,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:32:41,406 INFO L87 Difference]: Start difference. First operand 262 states and 317 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-21 09:32:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:41,487 INFO L93 Difference]: Finished difference Result 399 states and 475 transitions. [2022-07-21 09:32:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:32:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 120 [2022-07-21 09:32:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:41,490 INFO L225 Difference]: With dead ends: 399 [2022-07-21 09:32:41,490 INFO L226 Difference]: Without dead ends: 282 [2022-07-21 09:32:41,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:32:41,491 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 51 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:41,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 919 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 78 Unchecked, 0.0s Time] [2022-07-21 09:32:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-21 09:32:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-07-21 09:32:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 210 states have (on average 1.1095238095238096) internal successors, (233), 214 states have internal predecessors, (233), 47 states have call successors, (47), 24 states have call predecessors, (47), 24 states have return successors, (59), 43 states have call predecessors, (59), 46 states have call successors, (59) [2022-07-21 09:32:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 339 transitions. [2022-07-21 09:32:41,515 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 339 transitions. Word has length 120 [2022-07-21 09:32:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:41,515 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 339 transitions. [2022-07-21 09:32:41,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 10 states have internal predecessors, (74), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-21 09:32:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 339 transitions. [2022-07-21 09:32:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 09:32:41,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:41,517 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:41,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 09:32:41,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 09:32:41,730 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash -105996951, now seen corresponding path program 1 times [2022-07-21 09:32:41,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:41,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939148778] [2022-07-21 09:32:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:41,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-21 09:32:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-21 09:32:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-21 09:32:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-21 09:32:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-21 09:32:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-21 09:32:41,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:41,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939148778] [2022-07-21 09:32:41,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939148778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:41,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:41,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:32:41,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614328076] [2022-07-21 09:32:41,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:41,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:41,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:41,998 INFO L87 Difference]: Start difference. First operand 282 states and 339 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-07-21 09:32:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:42,592 INFO L93 Difference]: Finished difference Result 301 states and 361 transitions. [2022-07-21 09:32:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:32:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 124 [2022-07-21 09:32:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:42,594 INFO L225 Difference]: With dead ends: 301 [2022-07-21 09:32:42,594 INFO L226 Difference]: Without dead ends: 299 [2022-07-21 09:32:42,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:32:42,595 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 101 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:42,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 675 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:32:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-21 09:32:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 291. [2022-07-21 09:32:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 216 states have (on average 1.1064814814814814) internal successors, (239), 221 states have internal predecessors, (239), 48 states have call successors, (48), 25 states have call predecessors, (48), 26 states have return successors, (63), 44 states have call predecessors, (63), 47 states have call successors, (63) [2022-07-21 09:32:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 350 transitions. [2022-07-21 09:32:42,613 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 350 transitions. Word has length 124 [2022-07-21 09:32:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:42,613 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 350 transitions. [2022-07-21 09:32:42,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-07-21 09:32:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 350 transitions. [2022-07-21 09:32:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 09:32:42,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:42,615 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 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] [2022-07-21 09:32:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 09:32:42,615 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1905145871, now seen corresponding path program 1 times [2022-07-21 09:32:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340431827] [2022-07-21 09:32:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-21 09:32:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-21 09:32:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-21 09:32:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-21 09:32:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-21 09:32:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:32:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340431827] [2022-07-21 09:32:42,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340431827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867336785] [2022-07-21 09:32:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:42,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:42,992 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) [2022-07-21 09:32:43,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:32:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2832 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 09:32:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:43,656 INFO L390 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 [2022-07-21 09:32:43,891 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:43,891 INFO L390 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 [2022-07-21 09:32:43,897 INFO L390 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 [2022-07-21 09:32:44,013 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4371 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4371) |c_#memory_int|)) is different from true [2022-07-21 09:32:44,016 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4372 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4372) |c_#memory_int|)) is different from true [2022-07-21 09:32:44,019 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4373 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4373) |c_#memory_int|)) is different from true [2022-07-21 09:32:44,022 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4374 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4374) |c_#memory_int|)) is different from true [2022-07-21 09:32:44,025 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4375 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4375) |c_#memory_int|)) is different from true [2022-07-21 09:32:44,028 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4376 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4376) |c_#memory_int|)) is different from true [2022-07-21 09:32:44,043 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:44,043 INFO L390 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 20 treesize of output 26 [2022-07-21 09:32:44,051 INFO L390 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 [2022-07-21 09:32:44,149 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:44,150 INFO L390 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 23 treesize of output 29 [2022-07-21 09:32:44,193 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:44,194 INFO L390 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 23 treesize of output 29 [2022-07-21 09:32:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 21 not checked. [2022-07-21 09:32:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:46,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867336785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:46,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:46,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28] total 37 [2022-07-21 09:32:46,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240133459] [2022-07-21 09:32:46,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:32:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:32:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1580, Unknown=10, NotChecked=510, Total=2256 [2022-07-21 09:32:46,682 INFO L87 Difference]: Start difference. First operand 291 states and 350 transitions. Second operand has 37 states, 37 states have (on average 3.810810810810811) internal successors, (141), 36 states have internal predecessors, (141), 8 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2022-07-21 09:32:47,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:47,815 INFO L93 Difference]: Finished difference Result 580 states and 695 transitions. [2022-07-21 09:32:47,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 09:32:47,815 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.810810810810811) internal successors, (141), 36 states have internal predecessors, (141), 8 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) Word has length 128 [2022-07-21 09:32:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:47,817 INFO L225 Difference]: With dead ends: 580 [2022-07-21 09:32:47,817 INFO L226 Difference]: Without dead ends: 319 [2022-07-21 09:32:47,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 167 SyntacticMatches, 14 SemanticMatches, 59 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=227, Invalid=2745, Unknown=22, NotChecked=666, Total=3660 [2022-07-21 09:32:47,819 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 188 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2365 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:47,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1334 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1212 Invalid, 0 Unknown, 2365 Unchecked, 0.7s Time] [2022-07-21 09:32:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-21 09:32:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 305. [2022-07-21 09:32:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 225 states have (on average 1.1022222222222222) internal successors, (248), 231 states have internal predecessors, (248), 51 states have call successors, (51), 27 states have call predecessors, (51), 28 states have return successors, (67), 46 states have call predecessors, (67), 50 states have call successors, (67) [2022-07-21 09:32:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 366 transitions. [2022-07-21 09:32:47,839 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 366 transitions. Word has length 128 [2022-07-21 09:32:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:47,839 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 366 transitions. [2022-07-21 09:32:47,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.810810810810811) internal successors, (141), 36 states have internal predecessors, (141), 8 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2022-07-21 09:32:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 366 transitions. [2022-07-21 09:32:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-21 09:32:47,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:47,841 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 3, 3, 3, 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] [2022-07-21 09:32:47,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:48,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 09:32:48,059 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash 665588731, now seen corresponding path program 2 times [2022-07-21 09:32:48,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963433611] [2022-07-21 09:32:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:48,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-21 09:32:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 09:32:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 09:32:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-21 09:32:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-21 09:32:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:32:48,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963433611] [2022-07-21 09:32:48,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963433611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646861592] [2022-07-21 09:32:48,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:32:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:48,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:48,480 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) [2022-07-21 09:32:48,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:32:49,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:32:49,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:32:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 09:32:49,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:49,225 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:49,225 INFO L390 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 [2022-07-21 09:32:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:49,694 INFO L390 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 [2022-07-21 09:32:49,702 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:32:49,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:32:49,985 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4684 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4684) |c_#memory_int|)) is different from true [2022-07-21 09:32:49,990 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4685 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4685) |c_#memory_int|)) is different from true [2022-07-21 09:32:49,994 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4686 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4686) |c_#memory_int|)) is different from true [2022-07-21 09:32:49,999 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4687 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4687) |c_#memory_int|)) is different from true [2022-07-21 09:32:50,004 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4688 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4688) |c_#memory_int|)) is different from true [2022-07-21 09:32:50,009 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4689 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4689) |c_#memory_int|)) is different from true [2022-07-21 09:32:50,014 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4690 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_4690) |c_#memory_int|)) is different from true [2022-07-21 09:32:50,031 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:50,032 INFO L390 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 [2022-07-21 09:32:50,035 INFO L390 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 [2022-07-21 09:32:50,128 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:50,128 INFO L390 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 20 treesize of output 26 [2022-07-21 09:32:50,160 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:32:50,161 INFO L390 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 20 treesize of output 26 [2022-07-21 09:32:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 28 not checked. [2022-07-21 09:32:50,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:51,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646861592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:51,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:51,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 29] total 39 [2022-07-21 09:32:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853674515] [2022-07-21 09:32:51,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 09:32:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 09:32:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1509, Unknown=10, NotChecked=588, Total=2256 [2022-07-21 09:32:51,327 INFO L87 Difference]: Start difference. First operand 305 states and 366 transitions. Second operand has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 9 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2022-07-21 09:32:53,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:53,156 INFO L93 Difference]: Finished difference Result 639 states and 765 transitions. [2022-07-21 09:32:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:32:53,156 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 9 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 129 [2022-07-21 09:32:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:53,158 INFO L225 Difference]: With dead ends: 639 [2022-07-21 09:32:53,158 INFO L226 Difference]: Without dead ends: 378 [2022-07-21 09:32:53,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 173 SyntacticMatches, 16 SemanticMatches, 67 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=299, Invalid=3487, Unknown=24, NotChecked=882, Total=4692 [2022-07-21 09:32:53,161 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 184 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 5359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3313 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:53,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 2025 Invalid, 5359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1985 Invalid, 0 Unknown, 3313 Unchecked, 1.1s Time] [2022-07-21 09:32:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-21 09:32:53,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 339. [2022-07-21 09:32:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 251 states have (on average 1.1075697211155378) internal successors, (278), 257 states have internal predecessors, (278), 54 states have call successors, (54), 32 states have call predecessors, (54), 33 states have return successors, (71), 49 states have call predecessors, (71), 53 states have call successors, (71) [2022-07-21 09:32:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 403 transitions. [2022-07-21 09:32:53,183 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 403 transitions. Word has length 129 [2022-07-21 09:32:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:53,183 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 403 transitions. [2022-07-21 09:32:53,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.769230769230769) internal successors, (147), 38 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 9 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2022-07-21 09:32:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 403 transitions. [2022-07-21 09:32:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-21 09:32:53,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:53,185 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 3, 3, 3, 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] [2022-07-21 09:32:53,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:53,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:53,401 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:53,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1246017231, now seen corresponding path program 3 times [2022-07-21 09:32:53,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:53,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092784240] [2022-07-21 09:32:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:53,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:32:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:32:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:32:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:32:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:32:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:32:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:32:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-21 09:32:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:32:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:32:53,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092784240] [2022-07-21 09:32:53,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092784240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24235685] [2022-07-21 09:32:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:32:53,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:53,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:53,848 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) [2022-07-21 09:32:53,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:33:05,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 09:33:05,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:33:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 2870 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:33:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 09:33:05,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:33:06,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24235685] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:33:06,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:33:06,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-07-21 09:33:06,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252198211] [2022-07-21 09:33:06,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:06,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:33:06,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:33:06,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:33:06,262 INFO L87 Difference]: Start difference. First operand 339 states and 403 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 states have internal predecessors, (112), 2 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-21 09:33:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:11,258 INFO L93 Difference]: Finished difference Result 619 states and 740 transitions. [2022-07-21 09:33:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 09:33:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 states have internal predecessors, (112), 2 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 130 [2022-07-21 09:33:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:11,260 INFO L225 Difference]: With dead ends: 619 [2022-07-21 09:33:11,260 INFO L226 Difference]: Without dead ends: 356 [2022-07-21 09:33:11,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=572, Invalid=1234, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 09:33:11,261 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 148 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:11,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1000 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 09:33:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-21 09:33:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 349. [2022-07-21 09:33:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 261 states have (on average 1.103448275862069) internal successors, (288), 267 states have internal predecessors, (288), 54 states have call successors, (54), 32 states have call predecessors, (54), 33 states have return successors, (71), 49 states have call predecessors, (71), 53 states have call successors, (71) [2022-07-21 09:33:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 413 transitions. [2022-07-21 09:33:11,281 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 413 transitions. Word has length 130 [2022-07-21 09:33:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:11,281 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 413 transitions. [2022-07-21 09:33:11,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 states have internal predecessors, (112), 2 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-21 09:33:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 413 transitions. [2022-07-21 09:33:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-21 09:33:11,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:11,283 INFO L195 NwaCegarLoop]: trace histogram [18, 4, 4, 4, 3, 3, 3, 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] [2022-07-21 09:33:11,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:11,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-21 09:33:11,487 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -446619791, now seen corresponding path program 4 times [2022-07-21 09:33:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:11,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081129218] [2022-07-21 09:33:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:33:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:33:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:33:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:33:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:33:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:33:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:33:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:33:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-21 09:33:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:12,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:33:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:12,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-21 09:33:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:12,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-21 09:33:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-07-21 09:33:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:33:12,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081129218] [2022-07-21 09:33:12,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081129218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86799706] [2022-07-21 09:33:12,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:33:12,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:12,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:12,252 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) [2022-07-21 09:33:12,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:33:12,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:33:12,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:33:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 3060 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-21 09:33:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:12,930 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 09:33:12,931 INFO L390 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 [2022-07-21 09:33:13,776 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:33:13,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 09:33:13,791 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:33:13,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-21 09:33:13,797 INFO L390 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 [2022-07-21 09:33:13,964 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5582 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5582) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,968 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5583 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5583) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,971 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5584 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5584) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,974 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5585 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5585))) is different from true [2022-07-21 09:33:13,977 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5586 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5586) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,980 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5587 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5587) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,983 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5588 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5588) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,986 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5589 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5589) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,989 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5590 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5590) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,992 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5591 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5591))) is different from true [2022-07-21 09:33:13,995 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5592 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5592) |c_#memory_int|)) is different from true [2022-07-21 09:33:13,998 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5593 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5593))) is different from true [2022-07-21 09:33:14,001 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5594 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5594) |c_#memory_int|)) is different from true [2022-07-21 09:33:14,005 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5595 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5595))) is different from true [2022-07-21 09:33:14,008 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5596 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5596))) is different from true [2022-07-21 09:33:14,011 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5597 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5597) |c_#memory_int|)) is different from true [2022-07-21 09:33:14,014 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5598 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5598) |c_#memory_int|)) is different from true [2022-07-21 09:33:14,017 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5599 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_5599))) is different from true [2022-07-21 09:33:14,029 INFO L390 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 20 treesize of output 22 [2022-07-21 09:33:14,112 INFO L390 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 20 treesize of output 22 [2022-07-21 09:33:14,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:14,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:14,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:14,158 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 09:33:14,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 49 [2022-07-21 09:33:16,054 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base| Int) (|v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_91| Int)) (and (not (= |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base| |v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_91|)) (= (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_91|) 0)))) is different from true [2022-07-21 09:33:17,656 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_92| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base| Int)) (and (not (= |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base| |v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_92|)) (= (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_92|) 0)))) is different from true [2022-07-21 09:33:18,634 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_93| Int) (|ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base|) 0) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_93|) 0)) (not (= |ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_~#src#1.base| |v_ULTIMATE.start_aws_byte_buf_init_copy_from_cursor_harness_~#buf~3#1.base_BEFORE_CALL_93|)))) is different from true [2022-07-21 09:33:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 186 not checked. [2022-07-21 09:33:30,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86799706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:37,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:33:37,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 42] total 63 [2022-07-21 09:33:37,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006920098] [2022-07-21 09:33:37,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:37,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 09:33:37,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 09:33:37,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2609, Unknown=29, NotChecked=2562, Total=5402 [2022-07-21 09:33:37,371 INFO L87 Difference]: Start difference. First operand 349 states and 413 transitions. Second operand has 63 states, 63 states have (on average 2.746031746031746) internal successors, (173), 61 states have internal predecessors, (173), 7 states have call successors, (29), 10 states have call predecessors, (29), 11 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-07-21 09:33:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:39,853 INFO L93 Difference]: Finished difference Result 625 states and 739 transitions. [2022-07-21 09:33:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 09:33:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.746031746031746) internal successors, (173), 61 states have internal predecessors, (173), 7 states have call successors, (29), 10 states have call predecessors, (29), 11 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 140 [2022-07-21 09:33:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:39,855 INFO L225 Difference]: With dead ends: 625 [2022-07-21 09:33:39,855 INFO L226 Difference]: Without dead ends: 364 [2022-07-21 09:33:39,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 169 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 21 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=318, Invalid=5400, Unknown=66, NotChecked=3528, Total=9312 [2022-07-21 09:33:39,859 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 181 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 7304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6593 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:39,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1379 Invalid, 7304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 605 Invalid, 0 Unknown, 6593 Unchecked, 0.5s Time] [2022-07-21 09:33:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-21 09:33:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 350. [2022-07-21 09:33:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 262 states have (on average 1.1030534351145038) internal successors, (289), 268 states have internal predecessors, (289), 54 states have call successors, (54), 32 states have call predecessors, (54), 33 states have return successors, (71), 49 states have call predecessors, (71), 53 states have call successors, (71) [2022-07-21 09:33:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 414 transitions. [2022-07-21 09:33:39,884 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 414 transitions. Word has length 140 [2022-07-21 09:33:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:39,884 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 414 transitions. [2022-07-21 09:33:39,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.746031746031746) internal successors, (173), 61 states have internal predecessors, (173), 7 states have call successors, (29), 10 states have call predecessors, (29), 11 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-07-21 09:33:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 414 transitions. [2022-07-21 09:33:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-21 09:33:39,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:39,886 INFO L195 NwaCegarLoop]: trace histogram [19, 4, 4, 4, 3, 3, 3, 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] [2022-07-21 09:33:39,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:40,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:40,111 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1364743045, now seen corresponding path program 5 times [2022-07-21 09:33:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:40,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69966557] [2022-07-21 09:33:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:33:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 09:33:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 09:33:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-21 09:33:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-21 09:33:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 09:33:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:33:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:33:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 09:33:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-21 09:33:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-21 09:33:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-21 09:33:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-21 09:33:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:33:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69966557] [2022-07-21 09:33:40,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69966557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234059806] [2022-07-21 09:33:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:33:40,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:40,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:40,899 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) [2022-07-21 09:33:40,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process