./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_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 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:30:15,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:30:15,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:30:15,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:30:15,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:30:15,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:30:15,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:30:15,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:30:15,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:30:15,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:30:15,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:30:15,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:30:15,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:30:15,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:30:15,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:30:15,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:30:15,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:30:15,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:30:15,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:30:15,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:30:15,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:30:15,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:30:15,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:30:15,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:30:15,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:30:15,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:30:15,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:30:15,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:30:15,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:30:15,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:30:15,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:30:15,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:30:15,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:30:15,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:30:15,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:30:15,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:30:15,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:30:15,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:30:15,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:30:15,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:30:15,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:30:15,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:30:15,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:30:15,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:30:15,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:30:15,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:30:15,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:30:15,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:30:15,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:30:15,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:30:15,193 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:30:15,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:30:15,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:30:15,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:30:15,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:30:15,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:30:15,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:30:15,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:30:15,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:30:15,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:30:15,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:30:15,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:30:15,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:30:15,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:30:15,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:30:15,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:30:15,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:30:15,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:30:15,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:30:15,197 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:30:15,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:30:15,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:30:15,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:30:15,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 [2021-12-21 15:30:15,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:30:15,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:30:15,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:30:15,411 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:30:15,412 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:30:15,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-12-21 15:30:15,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0857eee8/540d127078314a2abfd7f9c9e68b36e5/FLAGbdbd2e7a1 [2021-12-21 15:30:15,996 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:30:15,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-12-21 15:30:16,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0857eee8/540d127078314a2abfd7f9c9e68b36e5/FLAGbdbd2e7a1 [2021-12-21 15:30:16,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0857eee8/540d127078314a2abfd7f9c9e68b36e5 [2021-12-21 15:30:16,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:30:16,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:30:16,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:30:16,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:30:16,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:30:16,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:30:16" (1/1) ... [2021-12-21 15:30:16,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee904e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:16, skipping insertion in model container [2021-12-21 15:30:16,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:30:16" (1/1) ... [2021-12-21 15:30:16,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:30:16,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:30:16,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-12-21 15:30:16,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-12-21 15:30:17,293 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,294 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,294 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,295 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,296 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,306 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,307 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,313 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,535 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:30:17,536 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:30:17,537 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:30:17,538 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:30:17,539 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:30:17,539 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:30:17,540 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:30:17,540 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:30:17,540 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:30:17,541 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:30:17,627 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:30:17,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,733 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:30:17,840 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:30:17,857 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-12-21 15:30:17,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-12-21 15:30:17,890 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,891 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,891 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,892 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,892 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,898 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,899 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,900 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,900 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:17,929 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:30:17,929 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:30:17,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:30:17,930 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:30:17,931 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:30:17,931 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:30:17,931 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:30:17,932 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:30:17,932 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:30:17,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:30:17,956 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:30:18,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:18,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:30:18,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:30:18,194 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:30:18,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18 WrapperNode [2021-12-21 15:30:18,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:30:18,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:30:18,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:30:18,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:30:18,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,342 INFO L137 Inliner]: procedures = 691, calls = 2624, calls flagged for inlining = 63, calls inlined = 11, statements flattened = 937 [2021-12-21 15:30:18,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:30:18,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:30:18,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:30:18,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:30:18,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:30:18,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:30:18,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:30:18,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:30:18,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (1/1) ... [2021-12-21 15:30:18,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:30:18,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:18,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:30:18,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:30:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-21 15:30:18,461 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-21 15:30:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:30:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-21 15:30:18,461 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-21 15:30:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-12-21 15:30:18,461 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-12-21 15:30:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:30:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-21 15:30:18,462 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-21 15:30:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 15:30:18,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 15:30:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:30:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:30:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:30:18,463 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-21 15:30:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-21 15:30:18,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:30:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:30:18,463 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-21 15:30:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-21 15:30:18,463 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-21 15:30:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-21 15:30:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-21 15:30:18,464 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-21 15:30:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-21 15:30:18,464 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-21 15:30:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 15:30:18,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 15:30:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-21 15:30:18,465 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-21 15:30:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-12-21 15:30:18,465 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-12-21 15:30:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:30:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:30:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:30:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-21 15:30:18,465 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-21 15:30:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-21 15:30:18,466 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-21 15:30:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:30:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:30:18,669 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:30:18,671 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:30:19,443 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:30:19,450 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:30:19,450 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-21 15:30:19,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:30:19 BoogieIcfgContainer [2021-12-21 15:30:19,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:30:19,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:30:19,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:30:19,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:30:19,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:30:16" (1/3) ... [2021-12-21 15:30:19,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa20ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:30:19, skipping insertion in model container [2021-12-21 15:30:19,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:30:18" (2/3) ... [2021-12-21 15:30:19,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa20ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:30:19, skipping insertion in model container [2021-12-21 15:30:19,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:30:19" (3/3) ... [2021-12-21 15:30:19,458 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_copy_harness.i [2021-12-21 15:30:19,462 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:30:19,462 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:30:19,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:30:19,516 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:30:19,516 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:30:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-21 15:30:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 15:30:19,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:19,536 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:19,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:19,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash -283420546, now seen corresponding path program 1 times [2021-12-21 15:30:19,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186463589] [2021-12-21 15:30:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:19,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:19,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:19,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:19,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:30:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:30:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:30:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:30:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 15:30:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 15:30:20,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:20,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186463589] [2021-12-21 15:30:20,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186463589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:20,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:30:20,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:30:20,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451931807] [2021-12-21 15:30:20,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:20,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:30:20,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:30:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:30:20,133 INFO L87 Difference]: Start difference. First operand has 185 states, 122 states have (on average 1.221311475409836) internal successors, (149), 121 states have internal predecessors, (149), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 15:30:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:20,340 INFO L93 Difference]: Finished difference Result 376 states and 532 transitions. [2021-12-21 15:30:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:30:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 82 [2021-12-21 15:30:20,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:20,355 INFO L225 Difference]: With dead ends: 376 [2021-12-21 15:30:20,355 INFO L226 Difference]: Without dead ends: 189 [2021-12-21 15:30:20,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:30:20,361 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:20,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 294 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:30:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-21 15:30:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2021-12-21 15:30:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-21 15:30:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 230 transitions. [2021-12-21 15:30:20,398 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 230 transitions. Word has length 82 [2021-12-21 15:30:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:20,398 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 230 transitions. [2021-12-21 15:30:20,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 15:30:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 230 transitions. [2021-12-21 15:30:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 15:30:20,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:20,402 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-21 15:30:20,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:30:20,402 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash 426190495, now seen corresponding path program 1 times [2021-12-21 15:30:20,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732784259] [2021-12-21 15:30:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:20,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:30:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:30:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:30:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:30:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:30:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 15:30:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 15:30:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 15:30:20,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732784259] [2021-12-21 15:30:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732784259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046518246] [2021-12-21 15:30:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:20,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:20,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:20,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:30:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 15:30:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 15:30:21,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:21,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046518246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:21,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:21,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-21 15:30:21,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370855869] [2021-12-21 15:30:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:21,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:30:21,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:30:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:30:21,326 INFO L87 Difference]: Start difference. First operand 179 states and 230 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:21,371 INFO L93 Difference]: Finished difference Result 248 states and 316 transitions. [2021-12-21 15:30:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:30:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 92 [2021-12-21 15:30:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:21,373 INFO L225 Difference]: With dead ends: 248 [2021-12-21 15:30:21,374 INFO L226 Difference]: Without dead ends: 173 [2021-12-21 15:30:21,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:30:21,375 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:21,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1130 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-21 15:30:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-21 15:30:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 111 states have internal predecessors, (127), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-21 15:30:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 220 transitions. [2021-12-21 15:30:21,386 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 220 transitions. Word has length 92 [2021-12-21 15:30:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:21,387 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 220 transitions. [2021-12-21 15:30:21,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 220 transitions. [2021-12-21 15:30:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 15:30:21,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:21,389 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-21 15:30:21,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 15:30:21,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:21,604 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1901749225, now seen corresponding path program 1 times [2021-12-21 15:30:21,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816260353] [2021-12-21 15:30:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:21,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:30:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:30:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:30:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:30:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:30:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:30:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:30:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 15:30:21,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:21,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816260353] [2021-12-21 15:30:21,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816260353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:21,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257255059] [2021-12-21 15:30:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:21,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:21,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:21,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:21,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:30:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:22,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 15:30:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 15:30:22,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:22,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257255059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:22,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:22,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2021-12-21 15:30:22,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408097102] [2021-12-21 15:30:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:22,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:30:22,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:30:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:30:22,483 INFO L87 Difference]: Start difference. First operand 173 states and 220 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-21 15:30:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:22,624 INFO L93 Difference]: Finished difference Result 249 states and 320 transitions. [2021-12-21 15:30:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:30:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 95 [2021-12-21 15:30:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:22,626 INFO L225 Difference]: With dead ends: 249 [2021-12-21 15:30:22,627 INFO L226 Difference]: Without dead ends: 176 [2021-12-21 15:30:22,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:30:22,628 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 78 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:22,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1119 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:30:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-21 15:30:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-21 15:30:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (49), 46 states have call predecessors, (49), 46 states have call successors, (49) [2021-12-21 15:30:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-12-21 15:30:22,638 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 95 [2021-12-21 15:30:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:22,639 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-12-21 15:30:22,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-21 15:30:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-12-21 15:30:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 15:30:22,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:22,641 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-21 15:30:22,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:22,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 15:30:22,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1019605314, now seen corresponding path program 1 times [2021-12-21 15:30:22,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896419050] [2021-12-21 15:30:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:22,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:22,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:22,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:22,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:22,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:22,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 15:30:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 15:30:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 15:30:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:30:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:30:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 15:30:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 15:30:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 15:30:23,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:23,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896419050] [2021-12-21 15:30:23,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896419050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:23,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131356703] [2021-12-21 15:30:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:23,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:23,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:23,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:23,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:30:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 15:30:23,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 15:30:23,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:23,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131356703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:23,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:23,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-21 15:30:23,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703675200] [2021-12-21 15:30:23,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:23,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:30:23,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:30:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:30:23,736 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:30:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:23,896 INFO L93 Difference]: Finished difference Result 338 states and 429 transitions. [2021-12-21 15:30:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:30:23,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 101 [2021-12-21 15:30:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:23,899 INFO L225 Difference]: With dead ends: 338 [2021-12-21 15:30:23,899 INFO L226 Difference]: Without dead ends: 176 [2021-12-21 15:30:23,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:30:23,902 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 249 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:23,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 481 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:30:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-21 15:30:23,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-12-21 15:30:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (47), 46 states have call predecessors, (47), 46 states have call successors, (47) [2021-12-21 15:30:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2021-12-21 15:30:23,925 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 101 [2021-12-21 15:30:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:23,926 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2021-12-21 15:30:23,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:30:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2021-12-21 15:30:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 15:30:23,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:23,932 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:23,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:24,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:24,153 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:24,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2090058387, now seen corresponding path program 2 times [2021-12-21 15:30:24,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:24,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629808795] [2021-12-21 15:30:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:24,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 15:30:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 15:30:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 15:30:24,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629808795] [2021-12-21 15:30:24,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629808795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379005210] [2021-12-21 15:30:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:30:24,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:24,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:24,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:30:24,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 15:30:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:30:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 15:30:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-21 15:30:24,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:24,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379005210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:24,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:24,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-21 15:30:24,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460794627] [2021-12-21 15:30:24,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:24,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:30:24,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:30:24,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:30:24,953 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:25,008 INFO L93 Difference]: Finished difference Result 188 states and 240 transitions. [2021-12-21 15:30:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:30:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 107 [2021-12-21 15:30:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:25,010 INFO L225 Difference]: With dead ends: 188 [2021-12-21 15:30:25,010 INFO L226 Difference]: Without dead ends: 186 [2021-12-21 15:30:25,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:30:25,011 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 22 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:25,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1493 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-21 15:30:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-12-21 15:30:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 121 states have internal predecessors, (135), 48 states have call successors, (48), 16 states have call predecessors, (48), 18 states have return successors, (54), 47 states have call predecessors, (54), 47 states have call successors, (54) [2021-12-21 15:30:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2021-12-21 15:30:25,021 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 107 [2021-12-21 15:30:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:25,021 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2021-12-21 15:30:25,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2021-12-21 15:30:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 15:30:25,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:25,022 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:25,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:25,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:25,242 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1813963275, now seen corresponding path program 1 times [2021-12-21 15:30:25,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:25,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126684725] [2021-12-21 15:30:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:25,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 15:30:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 15:30:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 15:30:25,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:25,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126684725] [2021-12-21 15:30:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126684725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:25,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110007307] [2021-12-21 15:30:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:25,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:25,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:25,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:25,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:30:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:25,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:30:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 15:30:26,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:26,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110007307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:26,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:26,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-21 15:30:26,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992264595] [2021-12-21 15:30:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:26,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:30:26,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:30:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:30:26,084 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-21 15:30:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:26,332 INFO L93 Difference]: Finished difference Result 342 states and 429 transitions. [2021-12-21 15:30:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:30:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 111 [2021-12-21 15:30:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:26,334 INFO L225 Difference]: With dead ends: 342 [2021-12-21 15:30:26,334 INFO L226 Difference]: Without dead ends: 182 [2021-12-21 15:30:26,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:30:26,335 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 275 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:26,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 775 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 15:30:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-21 15:30:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-12-21 15:30:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-21 15:30:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 233 transitions. [2021-12-21 15:30:26,344 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 233 transitions. Word has length 111 [2021-12-21 15:30:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:26,344 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 233 transitions. [2021-12-21 15:30:26,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-21 15:30:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 233 transitions. [2021-12-21 15:30:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 15:30:26,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:26,345 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-21 15:30:26,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 15:30:26,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:26,565 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash 693216864, now seen corresponding path program 1 times [2021-12-21 15:30:26,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:26,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57469978] [2021-12-21 15:30:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:26,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 15:30:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 15:30:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-21 15:30:26,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57469978] [2021-12-21 15:30:26,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57469978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:26,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:30:26,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:30:26,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355470867] [2021-12-21 15:30:26,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:26,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:30:26,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:30:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:30:26,850 INFO L87 Difference]: Start difference. First operand 182 states and 233 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:27,295 INFO L93 Difference]: Finished difference Result 286 states and 361 transitions. [2021-12-21 15:30:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:30:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-12-21 15:30:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:27,297 INFO L225 Difference]: With dead ends: 286 [2021-12-21 15:30:27,297 INFO L226 Difference]: Without dead ends: 200 [2021-12-21 15:30:27,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:30:27,298 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 166 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:27,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 522 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 15:30:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-21 15:30:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2021-12-21 15:30:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 119 states have internal predecessors, (133), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-21 15:30:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 234 transitions. [2021-12-21 15:30:27,307 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 234 transitions. Word has length 117 [2021-12-21 15:30:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:27,308 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 234 transitions. [2021-12-21 15:30:27,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 234 transitions. [2021-12-21 15:30:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 15:30:27,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:27,309 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-21 15:30:27,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:30:27,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1457718631, now seen corresponding path program 1 times [2021-12-21 15:30:27,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:27,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084848150] [2021-12-21 15:30:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:27,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 15:30:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:30:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-21 15:30:27,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:27,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084848150] [2021-12-21 15:30:27,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084848150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312250504] [2021-12-21 15:30:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:27,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:27,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:27,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:27,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:30:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:30:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-21 15:30:28,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:28,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312250504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:28,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:28,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-21 15:30:28,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463988814] [2021-12-21 15:30:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:28,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:30:28,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:30:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:30:28,184 INFO L87 Difference]: Start difference. First operand 183 states and 234 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:28,322 INFO L93 Difference]: Finished difference Result 370 states and 486 transitions. [2021-12-21 15:30:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:30:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 118 [2021-12-21 15:30:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:28,324 INFO L225 Difference]: With dead ends: 370 [2021-12-21 15:30:28,324 INFO L226 Difference]: Without dead ends: 201 [2021-12-21 15:30:28,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:30:28,325 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 40 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:28,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 782 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-12-21 15:30:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-21 15:30:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-12-21 15:30:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 124 states have internal predecessors, (140), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2021-12-21 15:30:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-12-21 15:30:28,334 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 118 [2021-12-21 15:30:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:28,334 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-12-21 15:30:28,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 15:30:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-12-21 15:30:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 15:30:28,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:28,336 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-21 15:30:28,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:28,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:28,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1199553193, now seen corresponding path program 1 times [2021-12-21 15:30:28,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:28,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187022342] [2021-12-21 15:30:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:28,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 15:30:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 15:30:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-21 15:30:28,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187022342] [2021-12-21 15:30:28,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187022342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572612032] [2021-12-21 15:30:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:28,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:28,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:28,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:28,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:30:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-21 15:30:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:29,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 15:30:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 15:30:30,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:30:30,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-21 15:30:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-21 15:30:30,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572612032] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:30:30,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:30:30,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 11] total 26 [2021-12-21 15:30:30,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430708650] [2021-12-21 15:30:30,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:30:30,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 15:30:30,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 15:30:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-12-21 15:30:30,486 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-21 15:30:32,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:32,023 INFO L93 Difference]: Finished difference Result 471 states and 618 transitions. [2021-12-21 15:30:32,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 15:30:32,024 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 118 [2021-12-21 15:30:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:32,026 INFO L225 Difference]: With dead ends: 471 [2021-12-21 15:30:32,026 INFO L226 Difference]: Without dead ends: 309 [2021-12-21 15:30:32,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 232 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 15:30:32,027 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 253 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:32,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1592 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1830 Invalid, 0 Unknown, 330 Unchecked, 1.3s Time] [2021-12-21 15:30:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-21 15:30:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 228. [2021-12-21 15:30:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 153 states have (on average 1.1633986928104576) internal successors, (178), 157 states have internal predecessors, (178), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (59), 50 states have call predecessors, (59), 51 states have call successors, (59) [2021-12-21 15:30:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 289 transitions. [2021-12-21 15:30:32,039 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 289 transitions. Word has length 118 [2021-12-21 15:30:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:32,039 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 289 transitions. [2021-12-21 15:30:32,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.875) internal successors, (141), 22 states have internal predecessors, (141), 10 states have call successors, (37), 5 states have call predecessors, (37), 7 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-21 15:30:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 289 transitions. [2021-12-21 15:30:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-21 15:30:32,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:32,041 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-21 15:30:32,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:32,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:32,257 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:32,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:32,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1264569920, now seen corresponding path program 1 times [2021-12-21 15:30:32,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:32,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273172230] [2021-12-21 15:30:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:32,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 15:30:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 15:30:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-21 15:30:32,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:32,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273172230] [2021-12-21 15:30:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273172230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:32,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219777180] [2021-12-21 15:30:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:32,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:32,508 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:32,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:30:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:32,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:30:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-21 15:30:32,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:32,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219777180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:32,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:32,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-21 15:30:32,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702972434] [2021-12-21 15:30:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:33,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:30:33,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:30:33,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:30:33,002 INFO L87 Difference]: Start difference. First operand 228 states and 289 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:33,021 INFO L93 Difference]: Finished difference Result 451 states and 576 transitions. [2021-12-21 15:30:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:30:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-12-21 15:30:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:33,024 INFO L225 Difference]: With dead ends: 451 [2021-12-21 15:30:33,024 INFO L226 Difference]: Without dead ends: 237 [2021-12-21 15:30:33,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:30:33,025 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 20 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:33,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 649 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-21 15:30:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-12-21 15:30:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 150 states have (on average 1.1533333333333333) internal successors, (173), 153 states have internal predecessors, (173), 52 states have call successors, (52), 20 states have call predecessors, (52), 21 states have return successors, (57), 50 states have call predecessors, (57), 51 states have call successors, (57) [2021-12-21 15:30:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2021-12-21 15:30:33,040 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 119 [2021-12-21 15:30:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:33,040 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2021-12-21 15:30:33,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2021-12-21 15:30:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 15:30:33,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:33,041 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:33,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:33,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 15:30:33,255 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1982077188, now seen corresponding path program 2 times [2021-12-21 15:30:33,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:33,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79160347] [2021-12-21 15:30:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:33,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 15:30:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 15:30:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:30:33,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:33,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79160347] [2021-12-21 15:30:33,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79160347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:33,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7831878] [2021-12-21 15:30:33,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:30:33,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:33,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:33,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 15:30:34,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:30:34,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:30:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 15:30:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 15:30:34,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:34,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7831878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:34,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:34,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-21 15:30:34,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680471536] [2021-12-21 15:30:34,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:34,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:30:34,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:30:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:30:34,585 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:34,634 INFO L93 Difference]: Finished difference Result 394 states and 495 transitions. [2021-12-21 15:30:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:30:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-12-21 15:30:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:34,636 INFO L225 Difference]: With dead ends: 394 [2021-12-21 15:30:34,636 INFO L226 Difference]: Without dead ends: 229 [2021-12-21 15:30:34,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:30:34,638 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 10 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:34,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1323 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-21 15:30:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-12-21 15:30:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 154 states have (on average 1.1493506493506493) internal successors, (177), 158 states have internal predecessors, (177), 52 states have call successors, (52), 20 states have call predecessors, (52), 22 states have return successors, (62), 50 states have call predecessors, (62), 51 states have call successors, (62) [2021-12-21 15:30:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 291 transitions. [2021-12-21 15:30:34,650 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 291 transitions. Word has length 123 [2021-12-21 15:30:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:34,650 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 291 transitions. [2021-12-21 15:30:34,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 291 transitions. [2021-12-21 15:30:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-21 15:30:34,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:34,652 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:34,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:34,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:34,871 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1351230667, now seen corresponding path program 1 times [2021-12-21 15:30:34,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:34,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131476921] [2021-12-21 15:30:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:34,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:34,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:34,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:34,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:34,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 15:30:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 15:30:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-21 15:30:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 15:30:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 15:30:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-21 15:30:35,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131476921] [2021-12-21 15:30:35,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131476921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147421807] [2021-12-21 15:30:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:35,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:35,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:35,140 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:35,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 15:30:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 15:30:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:35,949 INFO L387 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 17 treesize of output 9 [2021-12-21 15:30:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 15:30:36,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:36,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147421807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:36,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:36,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2021-12-21 15:30:36,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992612140] [2021-12-21 15:30:36,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:36,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:30:36,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:30:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:30:36,033 INFO L87 Difference]: Start difference. First operand 229 states and 291 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-21 15:30:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:36,570 INFO L93 Difference]: Finished difference Result 524 states and 702 transitions. [2021-12-21 15:30:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:30:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 126 [2021-12-21 15:30:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:36,573 INFO L225 Difference]: With dead ends: 524 [2021-12-21 15:30:36,573 INFO L226 Difference]: Without dead ends: 347 [2021-12-21 15:30:36,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-12-21 15:30:36,574 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 192 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:36,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1872 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 419 Invalid, 0 Unknown, 95 Unchecked, 0.4s Time] [2021-12-21 15:30:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-21 15:30:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 267. [2021-12-21 15:30:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 182 states have (on average 1.1373626373626373) internal successors, (207), 188 states have internal predecessors, (207), 56 states have call successors, (56), 23 states have call predecessors, (56), 28 states have return successors, (79), 55 states have call predecessors, (79), 55 states have call successors, (79) [2021-12-21 15:30:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 342 transitions. [2021-12-21 15:30:36,588 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 342 transitions. Word has length 126 [2021-12-21 15:30:36,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:36,588 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 342 transitions. [2021-12-21 15:30:36,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-21 15:30:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 342 transitions. [2021-12-21 15:30:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 15:30:36,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:36,590 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:36,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:36,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 15:30:36,811 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1989755287, now seen corresponding path program 1 times [2021-12-21 15:30:36,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:36,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910295804] [2021-12-21 15:30:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:36,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:36,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 15:30:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 15:30:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-21 15:30:37,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:37,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910295804] [2021-12-21 15:30:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910295804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:37,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268561749] [2021-12-21 15:30:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:37,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:37,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:37,015 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:37,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 15:30:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:30:37,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-21 15:30:37,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:37,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268561749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:37,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:37,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-21 15:30:37,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107814085] [2021-12-21 15:30:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:37,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:30:37,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:30:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:30:37,564 INFO L87 Difference]: Start difference. First operand 267 states and 342 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:37,588 INFO L93 Difference]: Finished difference Result 518 states and 665 transitions. [2021-12-21 15:30:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:30:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-12-21 15:30:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:37,596 INFO L225 Difference]: With dead ends: 518 [2021-12-21 15:30:37,596 INFO L226 Difference]: Without dead ends: 265 [2021-12-21 15:30:37,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:30:37,598 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 9 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:37,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 645 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-21 15:30:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2021-12-21 15:30:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 178 states have (on average 1.1292134831460674) internal successors, (201), 183 states have internal predecessors, (201), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (72), 55 states have call predecessors, (72), 55 states have call successors, (72) [2021-12-21 15:30:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 329 transitions. [2021-12-21 15:30:37,610 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 329 transitions. Word has length 125 [2021-12-21 15:30:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:37,610 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 329 transitions. [2021-12-21 15:30:37,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 329 transitions. [2021-12-21 15:30:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 15:30:37,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:37,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:37,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:37,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 15:30:37,833 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash 44113837, now seen corresponding path program 1 times [2021-12-21 15:30:37,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:37,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66401427] [2021-12-21 15:30:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:37,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:37,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 15:30:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 15:30:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-21 15:30:38,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:38,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66401427] [2021-12-21 15:30:38,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66401427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:38,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398935687] [2021-12-21 15:30:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:38,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:38,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:38,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:38,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 15:30:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:30:38,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-21 15:30:38,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:38,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398935687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:38,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:38,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-21 15:30:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361873977] [2021-12-21 15:30:38,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:38,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:30:38,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:30:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:30:38,572 INFO L87 Difference]: Start difference. First operand 262 states and 329 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:38,596 INFO L93 Difference]: Finished difference Result 488 states and 627 transitions. [2021-12-21 15:30:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:30:38,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-12-21 15:30:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:38,598 INFO L225 Difference]: With dead ends: 488 [2021-12-21 15:30:38,598 INFO L226 Difference]: Without dead ends: 259 [2021-12-21 15:30:38,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:30:38,600 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 26 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:38,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 657 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:30:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-21 15:30:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2021-12-21 15:30:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 169 states have (on average 1.1124260355029585) internal successors, (188), 173 states have internal predecessors, (188), 56 states have call successors, (56), 23 states have call predecessors, (56), 26 states have return successors, (71), 55 states have call predecessors, (71), 55 states have call successors, (71) [2021-12-21 15:30:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 315 transitions. [2021-12-21 15:30:38,610 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 315 transitions. Word has length 125 [2021-12-21 15:30:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:38,611 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 315 transitions. [2021-12-21 15:30:38,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 15:30:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 315 transitions. [2021-12-21 15:30:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 15:30:38,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:38,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:38,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:38,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 15:30:38,827 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash -308974545, now seen corresponding path program 1 times [2021-12-21 15:30:38,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:38,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242423359] [2021-12-21 15:30:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:38,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 15:30:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 15:30:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 15:30:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 15:30:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 15:30:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-21 15:30:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 15:30:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-21 15:30:39,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242423359] [2021-12-21 15:30:39,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242423359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200444116] [2021-12-21 15:30:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:39,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:39,086 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:39,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 15:30:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:39,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-21 15:30:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:39,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 15:30:40,034 INFO L387 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 16 treesize of output 8 [2021-12-21 15:30:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-21 15:30:40,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:30:40,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-21 15:30:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-21 15:30:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200444116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:30:40,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:30:40,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2021-12-21 15:30:40,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652455425] [2021-12-21 15:30:40,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:30:40,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 15:30:40,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 15:30:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-12-21 15:30:40,332 INFO L87 Difference]: Start difference. First operand 252 states and 315 transitions. Second operand has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-21 15:30:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:41,701 INFO L93 Difference]: Finished difference Result 461 states and 586 transitions. [2021-12-21 15:30:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:30:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) Word has length 125 [2021-12-21 15:30:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:41,703 INFO L225 Difference]: With dead ends: 461 [2021-12-21 15:30:41,703 INFO L226 Difference]: Without dead ends: 346 [2021-12-21 15:30:41,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 252 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-12-21 15:30:41,704 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 219 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:41,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1811 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1582 Invalid, 0 Unknown, 314 Unchecked, 1.1s Time] [2021-12-21 15:30:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-21 15:30:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 277. [2021-12-21 15:30:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 193 states have (on average 1.1139896373056994) internal successors, (215), 197 states have internal predecessors, (215), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (68), 56 states have call predecessors, (68), 55 states have call successors, (68) [2021-12-21 15:30:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 339 transitions. [2021-12-21 15:30:41,719 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 339 transitions. Word has length 125 [2021-12-21 15:30:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:41,720 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 339 transitions. [2021-12-21 15:30:41,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.0) internal successors, (140), 16 states have internal predecessors, (140), 10 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 12 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-21 15:30:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 339 transitions. [2021-12-21 15:30:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 15:30:41,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:41,722 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:41,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-21 15:30:41,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 15:30:41,935 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -564182680, now seen corresponding path program 1 times [2021-12-21 15:30:41,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370551698] [2021-12-21 15:30:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:41,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 15:30:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:30:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:30:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 15:30:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 15:30:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 15:30:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 15:30:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 15:30:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 15:30:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-21 15:30:42,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370551698] [2021-12-21 15:30:42,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370551698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032058043] [2021-12-21 15:30:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:42,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:42,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:42,248 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:42,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 15:30:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:42,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 15:30:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 15:30:42,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:42,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032058043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:42,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:42,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-21 15:30:42,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949792445] [2021-12-21 15:30:42,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:42,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:30:42,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:30:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:30:42,891 INFO L87 Difference]: Start difference. First operand 277 states and 339 transitions. Second operand has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-21 15:30:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:43,044 INFO L93 Difference]: Finished difference Result 544 states and 659 transitions. [2021-12-21 15:30:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:30:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 131 [2021-12-21 15:30:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:43,046 INFO L225 Difference]: With dead ends: 544 [2021-12-21 15:30:43,046 INFO L226 Difference]: Without dead ends: 263 [2021-12-21 15:30:43,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-12-21 15:30:43,047 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 12 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:43,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1639 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:30:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-21 15:30:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-21 15:30:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 180 states have (on average 1.1) internal successors, (198), 183 states have internal predecessors, (198), 56 states have call successors, (56), 23 states have call predecessors, (56), 26 states have return successors, (67), 56 states have call predecessors, (67), 55 states have call successors, (67) [2021-12-21 15:30:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 321 transitions. [2021-12-21 15:30:43,058 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 321 transitions. Word has length 131 [2021-12-21 15:30:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:43,059 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 321 transitions. [2021-12-21 15:30:43,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-21 15:30:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 321 transitions. [2021-12-21 15:30:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-21 15:30:43,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:43,060 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:43,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:43,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:43,282 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash 418439313, now seen corresponding path program 1 times [2021-12-21 15:30:43,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22324105] [2021-12-21 15:30:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:43,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 15:30:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:30:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 15:30:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 15:30:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 15:30:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 15:30:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 15:30:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-21 15:30:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-21 15:30:43,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:43,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22324105] [2021-12-21 15:30:43,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22324105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:43,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011173483] [2021-12-21 15:30:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:43,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:43,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:43,570 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:43,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 15:30:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2791 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 15:30:44,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:44,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:30:44,423 INFO L387 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 17 treesize of output 9 [2021-12-21 15:30:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-21 15:30:44,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:30:44,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011173483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:30:44,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:30:44,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-12-21 15:30:44,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815792431] [2021-12-21 15:30:44,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:30:44,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:30:44,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:30:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:30:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:30:44,507 INFO L87 Difference]: Start difference. First operand 263 states and 321 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-21 15:30:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:30:44,960 INFO L93 Difference]: Finished difference Result 512 states and 650 transitions. [2021-12-21 15:30:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 15:30:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 133 [2021-12-21 15:30:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:30:44,962 INFO L225 Difference]: With dead ends: 512 [2021-12-21 15:30:44,962 INFO L226 Difference]: Without dead ends: 334 [2021-12-21 15:30:44,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-21 15:30:44,963 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 168 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:30:44,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1636 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 322 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2021-12-21 15:30:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-21 15:30:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 269. [2021-12-21 15:30:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 185 states have (on average 1.0972972972972972) internal successors, (203), 189 states have internal predecessors, (203), 56 states have call successors, (56), 23 states have call predecessors, (56), 27 states have return successors, (72), 56 states have call predecessors, (72), 55 states have call successors, (72) [2021-12-21 15:30:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 331 transitions. [2021-12-21 15:30:44,976 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 331 transitions. Word has length 133 [2021-12-21 15:30:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:30:44,976 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 331 transitions. [2021-12-21 15:30:44,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-21 15:30:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 331 transitions. [2021-12-21 15:30:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-21 15:30:44,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:30:44,977 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:30:45,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 15:30:45,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 15:30:45,178 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:30:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:30:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1769824531, now seen corresponding path program 1 times [2021-12-21 15:30:45,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:30:45,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212798842] [2021-12-21 15:30:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:45,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:30:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:30:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:30:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 15:30:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 15:30:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 15:30:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 15:30:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:30:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 15:30:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 15:30:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 15:30:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 15:30:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 15:30:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 15:30:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-21 15:30:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-21 15:30:45,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:30:45,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212798842] [2021-12-21 15:30:45,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212798842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:30:45,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787992542] [2021-12-21 15:30:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:30:45,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:30:45,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:30:45,501 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:30:45,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 15:30:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:30:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 2796 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-21 15:30:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:30:45,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:30:46,144 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 15:30:46,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 15:30:46,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 15:30:46,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 15:31:02,682 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 15:31:02,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-21 15:31:04,955 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 15:31:04,956 INFO L387 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 15 treesize of output 15 [2021-12-21 15:31:05,011 INFO L387 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 27 treesize of output 27 [2021-12-21 15:31:08,465 INFO L387 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 27 treesize of output 27 [2021-12-21 15:31:21,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-21 15:31:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 53 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 15:31:21,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:31:21,658 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1836 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_1836) |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_init_copy_harness_~#src~0#1.offset| 8)) 0))) is different from false [2021-12-21 15:31:21,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787992542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:31:21,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:31:21,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 26 [2021-12-21 15:31:21,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912213010] [2021-12-21 15:31:21,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 15:31:21,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 15:31:21,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:31:21,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 15:31:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=660, Unknown=9, NotChecked=52, Total=812 [2021-12-21 15:31:21,666 INFO L87 Difference]: Start difference. First operand 269 states and 331 transitions. Second operand has 26 states, 26 states have (on average 5.5) internal successors, (143), 23 states have internal predecessors, (143), 10 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29)