./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_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_secure_zero_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 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:31:59,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:31:59,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:31:59,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:31:59,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:31:59,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:31:59,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:31:59,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:31:59,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:31:59,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:31:59,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:31:59,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:31:59,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:31:59,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:31:59,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:31:59,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:31:59,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:31:59,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:31:59,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:31:59,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:31:59,115 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:31:59,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:31:59,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:31:59,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:31:59,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:31:59,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:31:59,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:31:59,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:31:59,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:31:59,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:31:59,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:31:59,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:31:59,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:31:59,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:31:59,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:31:59,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:31:59,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:31:59,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:31:59,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:31:59,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:31:59,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:31:59,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:31:59,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 09:31:59,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:31:59,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:31:59,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:31:59,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:31:59,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:31:59,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:31:59,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:31:59,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:31:59,164 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:31:59,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:31:59,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:31:59,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:31:59,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:31:59,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:31:59,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:31:59,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:31:59,172 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:31:59,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:31:59,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:31:59,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:31:59,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:31:59,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:31:59,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:31:59,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:31:59,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:31:59,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:31:59,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:31:59,173 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:31:59,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:31:59,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:31:59,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2022-07-21 09:31:59,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:31:59,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:31:59,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:31:59,459 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:31:59,460 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:31:59,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2022-07-21 09:31:59,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceec9582/364bd3db231e4da99aef02f886d03566/FLAGe086b693d [2022-07-21 09:32:00,095 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:32:00,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2022-07-21 09:32:00,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceec9582/364bd3db231e4da99aef02f886d03566/FLAGe086b693d [2022-07-21 09:32:00,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceec9582/364bd3db231e4da99aef02f886d03566 [2022-07-21 09:32:00,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:32:00,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:32:00,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:32:00,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:32:00,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:32:00,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:32:00" (1/1) ... [2022-07-21 09:32:00,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ed4a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:00, skipping insertion in model container [2022-07-21 09:32:00,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:32:00" (1/1) ... [2022-07-21 09:32:00,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:32:00,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:32:00,723 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_secure_zero_harness.i[4498,4511] [2022-07-21 09:32:00,728 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_secure_zero_harness.i[4558,4571] [2022-07-21 09:32:01,210 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,210 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,211 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,216 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,217 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,225 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,225 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,227 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,227 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,431 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:32:01,432 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:32:01,432 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:32:01,433 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:32:01,434 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:32:01,435 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:32:01,435 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:32:01,436 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:32:01,436 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:32:01,436 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:32:01,536 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:32:01,600 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,600 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:32:01,680 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:32:01,688 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_secure_zero_harness.i[4498,4511] [2022-07-21 09:32:01,688 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_secure_zero_harness.i[4558,4571] [2022-07-21 09:32:01,709 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,709 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,710 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,710 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,710 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,721 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,721 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,722 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,722 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,742 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:32:01,742 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:32:01,743 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:32:01,747 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:32:01,748 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:32:01,749 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:32:01,749 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:32:01,750 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:32:01,750 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:32:01,750 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:32:01,781 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:32:01,853 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,864 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:32:01,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:32:02,106 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:32:02,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02 WrapperNode [2022-07-21 09:32:02,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:32:02,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:32:02,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:32:02,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:32:02,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,253 INFO L137 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 796 [2022-07-21 09:32:02,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:32:02,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:32:02,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:32:02,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:32:02,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:32:02,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:32:02,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:32:02,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:32:02,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (1/1) ... [2022-07-21 09:32:02,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:32:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:02,343 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 09:32:02,352 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 09:32:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-21 09:32:02,372 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-21 09:32:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:32:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-21 09:32:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-21 09:32:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:32:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 09:32:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 09:32:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2022-07-21 09:32:02,374 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2022-07-21 09:32:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:32:02,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:32:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 09:32:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:32:02,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:32:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-21 09:32:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-21 09:32:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 09:32:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 09:32:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:32:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 09:32:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 09:32:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-21 09:32:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-21 09:32:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-21 09:32:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-21 09:32:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:32:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-07-21 09:32:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-07-21 09:32:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-07-21 09:32:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-07-21 09:32:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:32:02,572 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:32:02,574 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:32:03,265 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:32:03,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:32:03,271 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 09:32:03,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:32:03 BoogieIcfgContainer [2022-07-21 09:32:03,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:32:03,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:32:03,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:32:03,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:32:03,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:32:00" (1/3) ... [2022-07-21 09:32:03,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:32:03, skipping insertion in model container [2022-07-21 09:32:03,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:32:02" (2/3) ... [2022-07-21 09:32:03,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:32:03, skipping insertion in model container [2022-07-21 09:32:03,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:32:03" (3/3) ... [2022-07-21 09:32:03,278 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2022-07-21 09:32:03,288 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:32:03,288 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:32:03,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:32:03,347 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@351c1087, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2168a95c [2022-07-21 09:32:03,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 09:32:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-21 09:32:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 09:32:03,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:03,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:03,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash -70528239, now seen corresponding path program 1 times [2022-07-21 09:32:03,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790017916] [2022-07-21 09:32:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:32:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 09:32:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 09:32:03,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:03,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790017916] [2022-07-21 09:32:03,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790017916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:03,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:03,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:32:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088589836] [2022-07-21 09:32:03,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:32:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:03,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:32:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:32:03,947 INFO L87 Difference]: Start difference. First operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:04,109 INFO L93 Difference]: Finished difference Result 202 states and 265 transitions. [2022-07-21 09:32:04,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:32:04,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2022-07-21 09:32:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:04,116 INFO L225 Difference]: With dead ends: 202 [2022-07-21 09:32:04,116 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 09:32:04,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:32:04,120 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:04,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 138 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:32:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 09:32:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-21 09:32:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 67 states have internal predecessors, (79), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 09:32:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2022-07-21 09:32:04,163 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 65 [2022-07-21 09:32:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:04,163 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2022-07-21 09:32:04,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2022-07-21 09:32:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 09:32:04,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:04,165 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:32:04,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1061132297, now seen corresponding path program 1 times [2022-07-21 09:32:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:04,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209218978] [2022-07-21 09:32:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:32:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 09:32:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 09:32:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 09:32:04,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209218978] [2022-07-21 09:32:04,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209218978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417371181] [2022-07-21 09:32:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:04,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:04,448 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 09:32:04,449 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 09:32:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:32:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 09:32:04,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:04,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417371181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:04,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:04,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-07-21 09:32:04,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836212915] [2022-07-21 09:32:04,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:04,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:32:04,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:04,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:32:04,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:32:04,981 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 09:32:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:05,113 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2022-07-21 09:32:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:32:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2022-07-21 09:32:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:05,116 INFO L225 Difference]: With dead ends: 174 [2022-07-21 09:32:05,116 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 09:32:05,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:32:05,117 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 140 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:05,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 272 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:32:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 09:32:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-07-21 09:32:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 21 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-21 09:32:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-07-21 09:32:05,126 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 65 [2022-07-21 09:32:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:05,126 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-07-21 09:32:05,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 09:32:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-07-21 09:32:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 09:32:05,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:05,128 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:05,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:32:05,343 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 09:32:05,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash -883820620, now seen corresponding path program 1 times [2022-07-21 09:32:05,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:05,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580548937] [2022-07-21 09:32:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:05,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:32:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-21 09:32:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 09:32:05,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580548937] [2022-07-21 09:32:05,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580548937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122998555] [2022-07-21 09:32:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:05,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:05,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:05,716 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 09:32:05,717 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 09:32:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:32:06,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 09:32:06,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:06,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122998555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:06,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:06,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-07-21 09:32:06,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461913893] [2022-07-21 09:32:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:32:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:32:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:32:06,256 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-21 09:32:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:06,411 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2022-07-21 09:32:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:32:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2022-07-21 09:32:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:06,414 INFO L225 Difference]: With dead ends: 172 [2022-07-21 09:32:06,414 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 09:32:06,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:32:06,416 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 150 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:06,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 413 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:32:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 09:32:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-21 09:32:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 67 states have internal predecessors, (78), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 09:32:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2022-07-21 09:32:06,430 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 71 [2022-07-21 09:32:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:06,430 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2022-07-21 09:32:06,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-21 09:32:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2022-07-21 09:32:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 09:32:06,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:06,431 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:06,456 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 09:32:06,647 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 09:32:06,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 81192906, now seen corresponding path program 1 times [2022-07-21 09:32:06,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142001547] [2022-07-21 09:32:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:06,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:32:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:32:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 09:32:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 09:32:06,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:06,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142001547] [2022-07-21 09:32:06,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142001547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:06,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:06,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:32:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523725745] [2022-07-21 09:32:06,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:06,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:06,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:06,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:06,933 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-21 09:32:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:07,282 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2022-07-21 09:32:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:32:07,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2022-07-21 09:32:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:07,284 INFO L225 Difference]: With dead ends: 110 [2022-07-21 09:32:07,284 INFO L226 Difference]: Without dead ends: 108 [2022-07-21 09:32:07,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:32:07,285 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 84 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:07,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 338 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-21 09:32:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-07-21 09:32:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-21 09:32:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2022-07-21 09:32:07,304 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 83 [2022-07-21 09:32:07,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:07,304 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2022-07-21 09:32:07,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-21 09:32:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2022-07-21 09:32:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 09:32:07,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:07,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:32:07,306 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1920648402, now seen corresponding path program 1 times [2022-07-21 09:32:07,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:07,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527869980] [2022-07-21 09:32:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:32:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:32:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 09:32:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 09:32:07,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527869980] [2022-07-21 09:32:07,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527869980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:07,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:07,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:32:07,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865734777] [2022-07-21 09:32:07,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:07,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:32:07,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:32:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:32:07,584 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:07,913 INFO L93 Difference]: Finished difference Result 214 states and 275 transitions. [2022-07-21 09:32:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:32:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2022-07-21 09:32:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:07,915 INFO L225 Difference]: With dead ends: 214 [2022-07-21 09:32:07,915 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 09:32:07,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:32:07,916 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 126 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:07,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 245 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 09:32:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-07-21 09:32:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-21 09:32:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-07-21 09:32:07,925 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 87 [2022-07-21 09:32:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:07,925 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-07-21 09:32:07,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-07-21 09:32:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 09:32:07,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:07,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:07,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:32:07,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:07,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2116153456, now seen corresponding path program 1 times [2022-07-21 09:32:07,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:07,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903913069] [2022-07-21 09:32:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:32:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:32:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 09:32:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 09:32:08,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:08,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903913069] [2022-07-21 09:32:08,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903913069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:08,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101233865] [2022-07-21 09:32:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:08,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:08,334 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 09:32:08,335 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 09:32:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 09:32:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:08,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:32:08,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:08,931 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-21 09:32:08,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-07-21 09:32:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 09:32:08,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101233865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:08,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:08,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2022-07-21 09:32:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281832771] [2022-07-21 09:32:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:08,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:32:08,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:08,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:32:08,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:32:08,936 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 09:32:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:08,974 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2022-07-21 09:32:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:32:08,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 87 [2022-07-21 09:32:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:08,976 INFO L225 Difference]: With dead ends: 222 [2022-07-21 09:32:08,976 INFO L226 Difference]: Without dead ends: 131 [2022-07-21 09:32:08,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:32:08,977 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 25 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:08,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 819 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2022-07-21 09:32:08,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-21 09:32:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-07-21 09:32:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.2) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 12 states have call predecessors, (22), 13 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-21 09:32:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2022-07-21 09:32:08,983 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 87 [2022-07-21 09:32:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:08,984 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2022-07-21 09:32:08,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 09:32:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2022-07-21 09:32:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 09:32:08,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:08,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:32:09,005 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 09:32:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:09,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash -729368046, now seen corresponding path program 1 times [2022-07-21 09:32:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078365021] [2022-07-21 09:32:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:09,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:32:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-21 09:32:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-21 09:32:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 09:32:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 09:32:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078365021] [2022-07-21 09:32:09,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078365021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058125257] [2022-07-21 09:32:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:09,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:09,382 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 09:32:09,383 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 09:32:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:32:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 09:32:09,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058125257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:09,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:09,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 09:32:09,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492236277] [2022-07-21 09:32:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:32:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:32:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:32:09,731 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:09,749 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2022-07-21 09:32:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:09,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2022-07-21 09:32:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:09,751 INFO L225 Difference]: With dead ends: 231 [2022-07-21 09:32:09,751 INFO L226 Difference]: Without dead ends: 140 [2022-07-21 09:32:09,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 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 09:32:09,752 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 20 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:09,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 349 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-21 09:32:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2022-07-21 09:32:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2022-07-21 09:32:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2022-07-21 09:32:09,757 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 87 [2022-07-21 09:32:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:09,758 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2022-07-21 09:32:09,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2022-07-21 09:32:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:09,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:09,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:09,781 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 09:32:09,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:09,979 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2043691690, now seen corresponding path program 2 times [2022-07-21 09:32:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:09,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956720662] [2022-07-21 09:32:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:32:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-21 09:32:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:32:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:32:10,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956720662] [2022-07-21 09:32:10,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956720662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552830492] [2022-07-21 09:32:10,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:32:10,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:10,159 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 09:32:10,160 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 09:32:10,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:32:10,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:32:10,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 09:32:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:10,552 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-21 09:32:10,552 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 21 treesize of output 20 [2022-07-21 09:32:10,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:10,557 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 21 treesize of output 20 [2022-07-21 09:32:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 09:32:10,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:10,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552830492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:10,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:10,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-07-21 09:32:10,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423033165] [2022-07-21 09:32:10,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:10,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:10,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:10,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:32:10,833 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:11,029 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2022-07-21 09:32:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:32:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-07-21 09:32:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:11,030 INFO L225 Difference]: With dead ends: 226 [2022-07-21 09:32:11,030 INFO L226 Difference]: Without dead ends: 160 [2022-07-21 09:32:11,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:32:11,031 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 64 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:11,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 504 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 101 Unchecked, 0.0s Time] [2022-07-21 09:32:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-21 09:32:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-07-21 09:32:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 125 states have internal predecessors, (148), 23 states have call successors, (23), 13 states have call predecessors, (23), 14 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2022-07-21 09:32:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 197 transitions. [2022-07-21 09:32:11,037 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 197 transitions. Word has length 91 [2022-07-21 09:32:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:11,037 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 197 transitions. [2022-07-21 09:32:11,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 197 transitions. [2022-07-21 09:32:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:11,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:11,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:11,058 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 09:32:11,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:11,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash 971411928, now seen corresponding path program 2 times [2022-07-21 09:32:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:11,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915864381] [2022-07-21 09:32:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:32:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-21 09:32:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:32:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 09:32:11,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:11,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915864381] [2022-07-21 09:32:11,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915864381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:11,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:11,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:32:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931436806] [2022-07-21 09:32:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:11,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:11,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:11,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:11,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:11,508 INFO L87 Difference]: Start difference. First operand 160 states and 197 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:11,882 INFO L93 Difference]: Finished difference Result 259 states and 316 transitions. [2022-07-21 09:32:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:32:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-07-21 09:32:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:11,884 INFO L225 Difference]: With dead ends: 259 [2022-07-21 09:32:11,884 INFO L226 Difference]: Without dead ends: 187 [2022-07-21 09:32:11,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:32:11,885 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 136 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:11,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 272 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-21 09:32:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2022-07-21 09:32:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 134 states have internal predecessors, (157), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-07-21 09:32:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 209 transitions. [2022-07-21 09:32:11,894 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 209 transitions. Word has length 91 [2022-07-21 09:32:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:11,895 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 209 transitions. [2022-07-21 09:32:11,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 209 transitions. [2022-07-21 09:32:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:11,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:11,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:11,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:32:11,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -875101412, now seen corresponding path program 1 times [2022-07-21 09:32:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:11,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460243717] [2022-07-21 09:32:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:11,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:32:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-21 09:32:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:32:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:32:12,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460243717] [2022-07-21 09:32:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460243717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125978126] [2022-07-21 09:32:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:12,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:12,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:12,093 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 09:32:12,094 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 09:32:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:12,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:32:12,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:12,630 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-21 09:32:12,630 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 22 [2022-07-21 09:32:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 09:32:12,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 09:32:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125978126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:13,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:13,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2022-07-21 09:32:13,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170345676] [2022-07-21 09:32:13,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:13,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 09:32:13,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 09:32:13,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:32:13,124 INFO L87 Difference]: Start difference. First operand 169 states and 209 transitions. Second operand has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-21 09:32:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:14,373 INFO L93 Difference]: Finished difference Result 368 states and 465 transitions. [2022-07-21 09:32:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:32:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-07-21 09:32:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:14,376 INFO L225 Difference]: With dead ends: 368 [2022-07-21 09:32:14,376 INFO L226 Difference]: Without dead ends: 233 [2022-07-21 09:32:14,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=321, Invalid=1659, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:32:14,378 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 284 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:14,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 544 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1389 Invalid, 0 Unknown, 326 Unchecked, 0.8s Time] [2022-07-21 09:32:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-21 09:32:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 222. [2022-07-21 09:32:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 173 states have (on average 1.1734104046242775) internal successors, (203), 183 states have internal predecessors, (203), 25 states have call successors, (25), 15 states have call predecessors, (25), 23 states have return successors, (49), 23 states have call predecessors, (49), 24 states have call successors, (49) [2022-07-21 09:32:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 277 transitions. [2022-07-21 09:32:14,394 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 277 transitions. Word has length 91 [2022-07-21 09:32:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:14,395 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 277 transitions. [2022-07-21 09:32:14,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-21 09:32:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 277 transitions. [2022-07-21 09:32:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 09:32:14,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:14,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:14,419 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 09:32:14,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:14,606 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1597930877, now seen corresponding path program 1 times [2022-07-21 09:32:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:14,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292490844] [2022-07-21 09:32:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:32:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:32:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 09:32:14,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292490844] [2022-07-21 09:32:14,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292490844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647202131] [2022-07-21 09:32:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:14,762 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 09:32:14,763 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 09:32:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:32:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 09:32:15,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:15,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647202131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:15,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:15,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 09:32:15,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578404498] [2022-07-21 09:32:15,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:15,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:32:15,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:32:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:32:15,171 INFO L87 Difference]: Start difference. First operand 222 states and 277 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:15,191 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2022-07-21 09:32:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:15,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2022-07-21 09:32:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:15,193 INFO L225 Difference]: With dead ends: 404 [2022-07-21 09:32:15,193 INFO L226 Difference]: Without dead ends: 207 [2022-07-21 09:32:15,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 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 09:32:15,194 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:15,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 342 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-21 09:32:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 198. [2022-07-21 09:32:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 152 states have (on average 1.144736842105263) internal successors, (174), 159 states have internal predecessors, (174), 25 states have call successors, (25), 15 states have call predecessors, (25), 20 states have return successors, (40), 23 states have call predecessors, (40), 24 states have call successors, (40) [2022-07-21 09:32:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2022-07-21 09:32:15,207 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 93 [2022-07-21 09:32:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:15,207 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2022-07-21 09:32:15,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2022-07-21 09:32:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 09:32:15,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:15,208 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:15,232 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 09:32:15,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:15,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:15,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1845910727, now seen corresponding path program 1 times [2022-07-21 09:32:15,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:15,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712382625] [2022-07-21 09:32:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:15,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:32:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 09:32:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 09:32:15,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712382625] [2022-07-21 09:32:15,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712382625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522375262] [2022-07-21 09:32:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:15,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:15,563 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 09:32:15,564 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 09:32:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:32:15,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 09:32:15,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:15,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522375262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:15,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:15,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 09:32:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905193860] [2022-07-21 09:32:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:15,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:32:15,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:32:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:32:15,933 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:15,950 INFO L93 Difference]: Finished difference Result 350 states and 436 transitions. [2022-07-21 09:32:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:32:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2022-07-21 09:32:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:15,951 INFO L225 Difference]: With dead ends: 350 [2022-07-21 09:32:15,951 INFO L226 Difference]: Without dead ends: 182 [2022-07-21 09:32:15,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 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 09:32:15,952 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 34 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:15,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 340 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-21 09:32:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-07-21 09:32:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 136 states have (on average 1.125) internal successors, (153), 141 states have internal predecessors, (153), 25 states have call successors, (25), 15 states have call predecessors, (25), 18 states have return successors, (36), 23 states have call predecessors, (36), 24 states have call successors, (36) [2022-07-21 09:32:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2022-07-21 09:32:15,961 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 93 [2022-07-21 09:32:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:15,961 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2022-07-21 09:32:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 09:32:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2022-07-21 09:32:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 09:32:15,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:15,963 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:15,985 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 09:32:16,176 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,SelfDestructingSolverStorable11 [2022-07-21 09:32:16,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1337532371, now seen corresponding path program 1 times [2022-07-21 09:32:16,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:16,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890762922] [2022-07-21 09:32:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:16,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:32:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 09:32:16,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:16,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890762922] [2022-07-21 09:32:16,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890762922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:16,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070308518] [2022-07-21 09:32:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:16,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:16,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:16,378 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 09:32:16,379 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 09:32:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 09:32:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:16,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:17,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:17,108 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:32:17,108 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 18 treesize of output 11 [2022-07-21 09:32:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 09:32:17,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:17,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070308518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:17,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:17,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2022-07-21 09:32:17,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163049821] [2022-07-21 09:32:17,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:17,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:17,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:17,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:32:17,125 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 09:32:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:17,253 INFO L93 Difference]: Finished difference Result 367 states and 438 transitions. [2022-07-21 09:32:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:32:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 97 [2022-07-21 09:32:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:17,256 INFO L225 Difference]: With dead ends: 367 [2022-07-21 09:32:17,256 INFO L226 Difference]: Without dead ends: 248 [2022-07-21 09:32:17,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:32:17,256 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 22 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:17,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 887 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-21 09:32:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-21 09:32:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2022-07-21 09:32:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 185 states have internal predecessors, (201), 30 states have call successors, (30), 19 states have call predecessors, (30), 23 states have return successors, (47), 28 states have call predecessors, (47), 29 states have call successors, (47) [2022-07-21 09:32:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 278 transitions. [2022-07-21 09:32:17,264 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 278 transitions. Word has length 97 [2022-07-21 09:32:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:17,264 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 278 transitions. [2022-07-21 09:32:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 09:32:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 278 transitions. [2022-07-21 09:32:17,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 09:32:17,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:17,266 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:17,289 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 09:32:17,466 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,SelfDestructingSolverStorable12 [2022-07-21 09:32:17,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1898232149, now seen corresponding path program 1 times [2022-07-21 09:32:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:17,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139937560] [2022-07-21 09:32:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 09:32:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 09:32:17,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:17,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139937560] [2022-07-21 09:32:17,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139937560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:17,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051125384] [2022-07-21 09:32:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:17,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:17,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:17,641 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 09:32:17,643 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 09:32:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 09:32:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:18,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:18,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:18,334 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:32:18,334 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 18 treesize of output 11 [2022-07-21 09:32:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 09:32:18,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:18,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051125384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:18,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:18,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2022-07-21 09:32:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555348336] [2022-07-21 09:32:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:32:18,350 INFO L87 Difference]: Start difference. First operand 233 states and 278 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 09:32:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:18,439 INFO L93 Difference]: Finished difference Result 385 states and 441 transitions. [2022-07-21 09:32:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:32:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 97 [2022-07-21 09:32:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:18,441 INFO L225 Difference]: With dead ends: 385 [2022-07-21 09:32:18,441 INFO L226 Difference]: Without dead ends: 266 [2022-07-21 09:32:18,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:32:18,442 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 25 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:18,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 650 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-21 09:32:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-21 09:32:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2022-07-21 09:32:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 190 states have (on average 1.1157894736842104) internal successors, (212), 197 states have internal predecessors, (212), 29 states have call successors, (29), 20 states have call predecessors, (29), 25 states have return successors, (43), 27 states have call predecessors, (43), 28 states have call successors, (43) [2022-07-21 09:32:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 284 transitions. [2022-07-21 09:32:18,452 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 284 transitions. Word has length 97 [2022-07-21 09:32:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:18,452 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 284 transitions. [2022-07-21 09:32:18,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 09:32:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 284 transitions. [2022-07-21 09:32:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-21 09:32:18,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:18,454 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:18,476 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 09:32:18,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:32:18,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2013780926, now seen corresponding path program 1 times [2022-07-21 09:32:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:18,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699311126] [2022-07-21 09:32:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:18,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:32:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 09:32:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:32:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-21 09:32:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-21 09:32:18,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699311126] [2022-07-21 09:32:18,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699311126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:18,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:18,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:32:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647733899] [2022-07-21 09:32:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:18,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:18,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:32:18,886 INFO L87 Difference]: Start difference. First operand 245 states and 284 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 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 09:32:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:19,323 INFO L93 Difference]: Finished difference Result 263 states and 303 transitions. [2022-07-21 09:32:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:32:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 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 109 [2022-07-21 09:32:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:19,324 INFO L225 Difference]: With dead ends: 263 [2022-07-21 09:32:19,325 INFO L226 Difference]: Without dead ends: 261 [2022-07-21 09:32:19,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:32:19,325 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 139 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:19,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 325 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:32:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-07-21 09:32:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 250. [2022-07-21 09:32:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 193 states have (on average 1.1139896373056994) internal successors, (215), 200 states have internal predecessors, (215), 30 states have call successors, (30), 21 states have call predecessors, (30), 26 states have return successors, (44), 28 states have call predecessors, (44), 29 states have call successors, (44) [2022-07-21 09:32:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 289 transitions. [2022-07-21 09:32:19,333 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 289 transitions. Word has length 109 [2022-07-21 09:32:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:19,334 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 289 transitions. [2022-07-21 09:32:19,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 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 09:32:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 289 transitions. [2022-07-21 09:32:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 09:32:19,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:19,346 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:32:19,346 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash 920679761, now seen corresponding path program 1 times [2022-07-21 09:32:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:19,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039854540] [2022-07-21 09:32:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:32:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-21 09:32:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 09:32:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-21 09:32:19,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039854540] [2022-07-21 09:32:19,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039854540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219095127] [2022-07-21 09:32:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:19,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:19,723 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 09:32:19,725 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 09:32:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 09:32:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:20,094 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 09:32:20,096 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 09:32:20,296 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 19 treesize of output 7 [2022-07-21 09:32:20,298 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 19 treesize of output 7 [2022-07-21 09:32:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 09:32:20,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:20,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219095127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:20,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:20,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2022-07-21 09:32:20,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994453802] [2022-07-21 09:32:20,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:20,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:20,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:20,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:32:20,316 INFO L87 Difference]: Start difference. First operand 250 states and 289 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-21 09:32:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:20,528 INFO L93 Difference]: Finished difference Result 367 states and 423 transitions. [2022-07-21 09:32:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:32:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 111 [2022-07-21 09:32:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:20,529 INFO L225 Difference]: With dead ends: 367 [2022-07-21 09:32:20,529 INFO L226 Difference]: Without dead ends: 257 [2022-07-21 09:32:20,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:32:20,530 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 51 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:20,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 674 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-07-21 09:32:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-07-21 09:32:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-07-21 09:32:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 198 states have (on average 1.1111111111111112) internal successors, (220), 204 states have internal predecessors, (220), 31 states have call successors, (31), 22 states have call predecessors, (31), 27 states have return successors, (44), 30 states have call predecessors, (44), 30 states have call successors, (44) [2022-07-21 09:32:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 295 transitions. [2022-07-21 09:32:20,538 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 295 transitions. Word has length 111 [2022-07-21 09:32:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:20,538 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 295 transitions. [2022-07-21 09:32:20,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-21 09:32:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 295 transitions. [2022-07-21 09:32:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-21 09:32:20,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:20,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:20,573 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 09:32:20,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:32:20,745 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1859335804, now seen corresponding path program 1 times [2022-07-21 09:32:20,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:20,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057122948] [2022-07-21 09:32:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 09:32:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 09:32:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:32:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-21 09:32:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 09:32:21,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:21,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057122948] [2022-07-21 09:32:21,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057122948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:21,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912100063] [2022-07-21 09:32:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:21,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:21,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:21,174 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 09:32:21,175 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 09:32:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 09:32:21,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:21,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 09:32:21,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:22,022 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 40 treesize of output 34 [2022-07-21 09:32:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-21 09:32:22,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912100063] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:22,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:22,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14, 12] total 30 [2022-07-21 09:32:22,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100807687] [2022-07-21 09:32:22,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:22,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:22,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:32:22,093 INFO L87 Difference]: Start difference. First operand 257 states and 295 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 09:32:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:22,435 INFO L93 Difference]: Finished difference Result 341 states and 389 transitions. [2022-07-21 09:32:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:32:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 113 [2022-07-21 09:32:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:22,437 INFO L225 Difference]: With dead ends: 341 [2022-07-21 09:32:22,437 INFO L226 Difference]: Without dead ends: 241 [2022-07-21 09:32:22,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:32:22,438 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 70 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:22,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 315 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-21 09:32:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 184. [2022-07-21 09:32:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 144 states have internal predecessors, (155), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-07-21 09:32:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 210 transitions. [2022-07-21 09:32:22,447 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 210 transitions. Word has length 113 [2022-07-21 09:32:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:22,447 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 210 transitions. [2022-07-21 09:32:22,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 09:32:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 210 transitions. [2022-07-21 09:32:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 09:32:22,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:22,448 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:32:22,471 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 09:32:22,667 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,SelfDestructingSolverStorable16 [2022-07-21 09:32:22,667 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1216300311, now seen corresponding path program 1 times [2022-07-21 09:32:22,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:22,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843341105] [2022-07-21 09:32:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 09:32:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-21 09:32:22,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:22,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843341105] [2022-07-21 09:32:22,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843341105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:22,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766464943] [2022-07-21 09:32:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:22,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:22,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:22,867 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 09:32:22,868 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 09:32:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 09:32:23,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:23,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:23,633 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:32:23,633 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 13 [2022-07-21 09:32:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 09:32:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:24,044 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 23 treesize of output 11 [2022-07-21 09:32:24,113 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-21 09:32:24,113 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 24 treesize of output 19 [2022-07-21 09:32:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-21 09:32:24,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766464943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:24,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:24,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 13] total 32 [2022-07-21 09:32:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177984926] [2022-07-21 09:32:24,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:24,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 09:32:24,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:24,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 09:32:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:32:24,129 INFO L87 Difference]: Start difference. First operand 184 states and 210 transitions. Second operand has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2022-07-21 09:32:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:26,311 INFO L93 Difference]: Finished difference Result 348 states and 401 transitions. [2022-07-21 09:32:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 09:32:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 115 [2022-07-21 09:32:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:26,313 INFO L225 Difference]: With dead ends: 348 [2022-07-21 09:32:26,313 INFO L226 Difference]: Without dead ends: 198 [2022-07-21 09:32:26,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 226 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=434, Invalid=4674, Unknown=4, NotChecked=0, Total=5112 [2022-07-21 09:32:26,315 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 278 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:26,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1048 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2222 Invalid, 0 Unknown, 262 Unchecked, 1.0s Time] [2022-07-21 09:32:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-21 09:32:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2022-07-21 09:32:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 116 states have internal predecessors, (124), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-21 09:32:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-07-21 09:32:26,323 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 115 [2022-07-21 09:32:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:26,323 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-07-21 09:32:26,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2022-07-21 09:32:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-07-21 09:32:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 09:32:26,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:26,324 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:26,345 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 09:32:26,543 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,SelfDestructingSolverStorable17 [2022-07-21 09:32:26,543 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash -140184041, now seen corresponding path program 1 times [2022-07-21 09:32:26,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:26,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652725762] [2022-07-21 09:32:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:26,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:32:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:32:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-21 09:32:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-21 09:32:26,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:26,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652725762] [2022-07-21 09:32:26,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652725762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:26,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:26,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:32:26,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278080896] [2022-07-21 09:32:26,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:26,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:32:26,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:26,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:32:26,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:32:26,697 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:32:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:26,915 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2022-07-21 09:32:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:32:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-07-21 09:32:26,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:26,917 INFO L225 Difference]: With dead ends: 244 [2022-07-21 09:32:26,917 INFO L226 Difference]: Without dead ends: 156 [2022-07-21 09:32:26,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 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 09:32:26,918 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 99 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:26,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 158 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:32:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-21 09:32:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-07-21 09:32:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 117 states have internal predecessors, (125), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-21 09:32:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2022-07-21 09:32:26,924 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 118 [2022-07-21 09:32:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:26,925 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2022-07-21 09:32:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:32:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2022-07-21 09:32:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 09:32:26,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:26,926 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:32:26,926 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 693312025, now seen corresponding path program 1 times [2022-07-21 09:32:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:26,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153913491] [2022-07-21 09:32:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:32:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:32:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:32:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:32:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:32:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:32:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:32:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:27,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 09:32:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-21 09:32:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153913491] [2022-07-21 09:32:28,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153913491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996051427] [2022-07-21 09:32:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:28,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:28,289 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 09:32:28,290 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 09:32:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-21 09:32:28,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:28,820 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 09:32:30,865 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46|)) is different from true [2022-07-21 09:32:32,932 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47|)) is different from true [2022-07-21 09:32:35,041 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21|) 8) 1) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21|)) is different from true [2022-07-21 09:32:58,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:32:58,455 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-07-21 09:33:05,370 WARN L855 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_memset_impl_#in~s.base|) (exists ((v_ArrVal_1059 (Array Int Int))) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1059) |c_#memory_int|)))) is different from true [2022-07-21 09:33:05,389 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1059 (Array Int Int)) (memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_my_memset_#in~s.base|) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1059) |c_#memory_int|))) is different from true [2022-07-21 09:33:05,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:05,404 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 19 treesize of output 21 [2022-07-21 09:33:05,426 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 31 treesize of output 26 [2022-07-21 09:33:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 16 refuted. 6 times theorem prover too weak. 12 trivial. 38 not checked. [2022-07-21 09:33:12,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:12,447 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_memset_impl_~sp~0.base_8 Int) (v_ArrVal_1067 (Array Int Int))) (or (< |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_memset_impl_~sp~0.base_8) (not (= (mod (select (select (store |c_#memory_int| v_memset_impl_~sp~0.base_8 v_ArrVal_1067) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0)))) is different from false [2022-07-21 09:33:12,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996051427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:12,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:33:12,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 50 [2022-07-21 09:33:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365549476] [2022-07-21 09:33:12,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 09:33:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 09:33:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=24, NotChecked=594, Total=2970 [2022-07-21 09:33:12,451 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand has 50 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 41 states have internal predecessors, (142), 18 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-21 09:34:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:27,243 INFO L93 Difference]: Finished difference Result 297 states and 335 transitions. [2022-07-21 09:34:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 09:34:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 41 states have internal predecessors, (142), 18 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) Word has length 120 [2022-07-21 09:34:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:27,244 INFO L225 Difference]: With dead ends: 297 [2022-07-21 09:34:27,244 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 09:34:27,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 116.9s TimeCoverageRelationStatistics Valid=372, Invalid=5289, Unknown=63, NotChecked=918, Total=6642 [2022-07-21 09:34:27,246 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 163 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 4628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1993 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:27,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1033 Invalid, 4628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2554 Invalid, 0 Unknown, 1993 Unchecked, 1.4s Time] [2022-07-21 09:34:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 09:34:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 177. [2022-07-21 09:34:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 136 states have internal predecessors, (144), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (30), 24 states have call predecessors, (30), 23 states have call successors, (30) [2022-07-21 09:34:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2022-07-21 09:34:27,254 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 120 [2022-07-21 09:34:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:27,254 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2022-07-21 09:34:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 41 states have internal predecessors, (142), 18 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-21 09:34:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2022-07-21 09:34:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 09:34:27,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:27,255 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:34:27,278 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 09:34:27,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:27,471 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1861902303, now seen corresponding path program 1 times [2022-07-21 09:34:27,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:27,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458307670] [2022-07-21 09:34:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:34:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:34:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:34:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:34:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:34:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:34:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:34:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 09:34:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:34:27,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458307670] [2022-07-21 09:34:27,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458307670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:27,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:27,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:34:27,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636633181] [2022-07-21 09:34:27,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:27,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:34:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:34:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:34:27,707 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 9 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:34:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:28,112 INFO L93 Difference]: Finished difference Result 265 states and 297 transitions. [2022-07-21 09:34:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:34:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2022-07-21 09:34:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:28,114 INFO L225 Difference]: With dead ends: 265 [2022-07-21 09:34:28,114 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 09:34:28,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:34:28,114 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 149 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:28,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 251 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:34:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 09:34:28,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2022-07-21 09:34:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 136 states have internal predecessors, (144), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (30), 24 states have call predecessors, (30), 23 states have call successors, (30) [2022-07-21 09:34:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2022-07-21 09:34:28,124 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 120 [2022-07-21 09:34:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:28,126 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2022-07-21 09:34:28,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:34:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2022-07-21 09:34:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 09:34:28,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:28,127 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:34:28,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 09:34:28,128 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2120067741, now seen corresponding path program 1 times [2022-07-21 09:34:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:28,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107463024] [2022-07-21 09:34:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:28,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:34:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:34:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:34:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:34:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:34:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:34:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:34:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 09:34:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-21 09:34:28,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:28,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107463024] [2022-07-21 09:34:28,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107463024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:28,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:28,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:34:28,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854741668] [2022-07-21 09:34:28,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:28,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:34:28,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:34:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:34:28,328 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:34:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:28,623 INFO L93 Difference]: Finished difference Result 260 states and 293 transitions. [2022-07-21 09:34:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:34:28,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 120 [2022-07-21 09:34:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:28,626 INFO L225 Difference]: With dead ends: 260 [2022-07-21 09:34:28,626 INFO L226 Difference]: Without dead ends: 180 [2022-07-21 09:34:28,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:34:28,627 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 141 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:28,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 184 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:34:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-21 09:34:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2022-07-21 09:34:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 130 states have (on average 1.0846153846153845) internal successors, (141), 134 states have internal predecessors, (141), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (30), 24 states have call predecessors, (30), 23 states have call successors, (30) [2022-07-21 09:34:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2022-07-21 09:34:28,635 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 120 [2022-07-21 09:34:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:28,635 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2022-07-21 09:34:28,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:34:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2022-07-21 09:34:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-21 09:34:28,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:28,636 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:28,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 09:34:28,637 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1789241476, now seen corresponding path program 1 times [2022-07-21 09:34:28,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:28,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83839814] [2022-07-21 09:34:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:28,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:34:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:34:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:34:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:34:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:34:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:34:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:34:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 09:34:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-21 09:34:28,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:28,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83839814] [2022-07-21 09:34:28,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83839814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:28,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:28,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 09:34:28,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968572030] [2022-07-21 09:34:28,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:28,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:34:28,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:28,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:34:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:34:28,868 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:34:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:29,407 INFO L93 Difference]: Finished difference Result 195 states and 218 transitions. [2022-07-21 09:34:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:34:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 122 [2022-07-21 09:34:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:29,409 INFO L225 Difference]: With dead ends: 195 [2022-07-21 09:34:29,409 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 09:34:29,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:34:29,409 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 137 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:29,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 374 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:34:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 09:34:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 181. [2022-07-21 09:34:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 140 states have internal predecessors, (146), 24 states have call successors, (24), 16 states have call predecessors, (24), 21 states have return successors, (33), 24 states have call predecessors, (33), 23 states have call successors, (33) [2022-07-21 09:34:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 203 transitions. [2022-07-21 09:34:29,418 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 203 transitions. Word has length 122 [2022-07-21 09:34:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:29,418 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 203 transitions. [2022-07-21 09:34:29,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-21 09:34:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 203 transitions. [2022-07-21 09:34:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-21 09:34:29,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:29,419 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:29,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 09:34:29,419 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1804661242, now seen corresponding path program 1 times [2022-07-21 09:34:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776480240] [2022-07-21 09:34:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:29,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:34:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:34:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:34:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:34:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:34:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:34:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:34:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 09:34:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:34:29,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776480240] [2022-07-21 09:34:29,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776480240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:29,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:29,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:34:29,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117796658] [2022-07-21 09:34:29,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:29,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:34:29,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:29,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:34:29,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:34:29,629 INFO L87 Difference]: Start difference. First operand 181 states and 203 transitions. Second operand has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:34:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:29,979 INFO L93 Difference]: Finished difference Result 271 states and 302 transitions. [2022-07-21 09:34:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:34:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2022-07-21 09:34:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:29,980 INFO L225 Difference]: With dead ends: 271 [2022-07-21 09:34:29,980 INFO L226 Difference]: Without dead ends: 187 [2022-07-21 09:34:29,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:34:29,981 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 122 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:29,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 229 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:34:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-21 09:34:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 176. [2022-07-21 09:34:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 131 states have (on average 1.083969465648855) internal successors, (142), 135 states have internal predecessors, (142), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (30), 24 states have call predecessors, (30), 23 states have call successors, (30) [2022-07-21 09:34:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2022-07-21 09:34:29,992 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 122 [2022-07-21 09:34:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:29,993 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2022-07-21 09:34:29,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:34:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2022-07-21 09:34:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-21 09:34:29,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:29,994 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:29,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 09:34:29,994 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:29,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1475852901, now seen corresponding path program 2 times [2022-07-21 09:34:29,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:29,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907419394] [2022-07-21 09:34:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:29,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 09:34:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 09:34:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 09:34:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 09:34:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:34:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:34:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 09:34:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:30,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:31,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-21 09:34:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 09:34:31,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:31,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907419394] [2022-07-21 09:34:31,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907419394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:31,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359636004] [2022-07-21 09:34:31,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:34:31,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:34:31,523 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 09:34:31,529 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 09:34:32,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:34:32,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:34:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-21 09:34:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:34:32,611 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:34:32,850 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:34:32,850 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 09:34:32,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:34:34,872 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_52| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_52| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_52|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR)))) is different from true [2022-07-21 09:34:36,910 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_53| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_53| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_53|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR)))) is different from true [2022-07-21 09:34:38,950 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_26| Int)) (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_26| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_26|) 8)))) is different from true [2022-07-21 09:34:47,261 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_27| Int)) (and (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_27| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_27|) 8))) (not (= (mod (select (select |c_#memory_int| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_27|) 16) 18446744073709551616) 0)))) is different from true [2022-07-21 09:34:47,349 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 20 treesize of output 8 [2022-07-21 09:34:47,559 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1410 (Array Int Int))) (= (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| v_ArrVal_1410) |c_#memory_int|)) is different from true [2022-07-21 09:34:47,568 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1410 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memset_#in~s.base| v_ArrVal_1410))) is different from true [2022-07-21 09:34:47,577 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 19 treesize of output 21 [2022-07-21 09:34:47,599 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 31 treesize of output 26 [2022-07-21 09:35:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 21 refuted. 10 times theorem prover too weak. 4 trivial. 48 not checked. [2022-07-21 09:35:01,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:35:02,295 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1419 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_ArrVal_1419) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0))) is different from false [2022-07-21 09:35:02,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359636004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:35:02,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:35:02,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 53 [2022-07-21 09:35:02,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087655486] [2022-07-21 09:35:02,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:35:02,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 09:35:02,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:02,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 09:35:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2389, Unknown=15, NotChecked=728, Total=3306 [2022-07-21 09:35:02,298 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand has 53 states, 49 states have (on average 3.020408163265306) internal successors, (148), 45 states have internal predecessors, (148), 15 states have call successors, (25), 13 states have call predecessors, (25), 14 states have return successors, (23), 15 states have call predecessors, (23), 14 states have call successors, (23)