./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_front_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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-03 23:16:54,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 23:16:54,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 23:16:54,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 23:16:54,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 23:16:54,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 23:16:54,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 23:16:54,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 23:16:54,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 23:16:54,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 23:16:54,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 23:16:54,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 23:16:54,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 23:16:54,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 23:16:54,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 23:16:54,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 23:16:54,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 23:16:54,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 23:16:54,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 23:16:54,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 23:16:54,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 23:16:54,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 23:16:54,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 23:16:54,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 23:16:54,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 23:16:54,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 23:16:54,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 23:16:54,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 23:16:54,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 23:16:54,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 23:16:54,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 23:16:54,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 23:16:54,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 23:16:54,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 23:16:54,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 23:16:54,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 23:16:54,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 23:16:54,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 23:16:54,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 23:16:54,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 23:16:54,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 23:16:54,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-03 23:16:54,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 23:16:54,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 23:16:54,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-03 23:16:54,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-03 23:16:54,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 23:16:54,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 23:16:54,194 INFO L138 SettingsManager]: * Use SBE=true [2021-11-03 23:16:54,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 23:16:54,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 23:16:54,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 23:16:54,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 23:16:54,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 23:16:54,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 23:16:54,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 23:16:54,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 23:16:54,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 23:16:54,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 23:16:54,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 23:16:54,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 23:16:54,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 23:16:54,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 23:16:54,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 23:16:54,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 23:16:54,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-03 23:16:54,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 23:16:54,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-03 23:16:54,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-03 23:16:54,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 23:16:54,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 23:16:54,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-03 23:16:54,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 23:16:54,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 23:16:54,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 23:16:54,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 23:16:54,454 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 23:16:54,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-03 23:16:54,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9558dc9a/199ac3d6e5bc4947b795d9ae0c9513f4/FLAG0a64a6a18 [2021-11-03 23:16:55,201 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 23:16:55,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-03 23:16:55,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9558dc9a/199ac3d6e5bc4947b795d9ae0c9513f4/FLAG0a64a6a18 [2021-11-03 23:16:55,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9558dc9a/199ac3d6e5bc4947b795d9ae0c9513f4 [2021-11-03 23:16:55,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 23:16:55,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 23:16:55,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 23:16:55,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 23:16:55,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 23:16:55,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 11:16:55" (1/1) ... [2021-11-03 23:16:55,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b26627a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:55, skipping insertion in model container [2021-11-03 23:16:55,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 11:16:55" (1/1) ... [2021-11-03 23:16:55,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 23:16:55,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 23:16:55,811 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-03 23:16:55,820 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-03 23:16:55,840 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 23:16:55,846 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 23:16:56,586 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,588 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,589 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,590 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,590 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,630 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,630 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,635 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,637 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,640 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,641 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,642 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,643 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:56,877 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 23:16:56,878 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 23:16:56,879 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 23:16:56,880 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 23:16:56,882 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 23:16:56,883 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 23:16:56,883 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 23:16:56,884 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 23:16:56,884 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 23:16:56,885 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 23:16:56,991 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 23:16:57,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 23:16:57,032 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 23:16:57,048 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-03 23:16:57,052 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-03 23:16:57,054 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 23:16:57,055 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 23:16:57,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,075 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,076 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,076 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,080 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,081 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,082 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,082 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,082 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,083 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,083 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,083 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 23:16:57,105 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 23:16:57,105 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 23:16:57,106 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 23:16:57,107 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 23:16:57,107 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 23:16:57,108 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 23:16:57,108 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 23:16:57,109 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 23:16:57,109 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 23:16:57,109 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 23:16:57,122 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 23:16:57,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 23:16:57,334 INFO L208 MainTranslator]: Completed translation [2021-11-03 23:16:57,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57 WrapperNode [2021-11-03 23:16:57,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 23:16:57,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 23:16:57,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 23:16:57,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 23:16:57,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 23:16:57,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 23:16:57,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 23:16:57,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 23:16:57,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 23:16:57,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 23:16:57,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 23:16:57,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 23:16:57,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (1/1) ... [2021-11-03 23:16:57,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 23:16:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:16:57,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 23:16:57,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 23:16:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 23:16:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 23:16:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 23:16:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 23:16:57,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 23:16:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 23:16:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 23:16:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 23:16:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 23:16:57,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 23:16:57,936 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-03 23:16:57,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 11:16:57 BoogieIcfgContainer [2021-11-03 23:16:57,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 23:16:57,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 23:16:57,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 23:16:57,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 23:16:57,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 11:16:55" (1/3) ... [2021-11-03 23:16:57,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bd61c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 11:16:57, skipping insertion in model container [2021-11-03 23:16:57,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 11:16:57" (2/3) ... [2021-11-03 23:16:57,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bd61c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 11:16:57, skipping insertion in model container [2021-11-03 23:16:57,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 11:16:57" (3/3) ... [2021-11-03 23:16:57,946 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2021-11-03 23:16:57,950 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 23:16:57,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-03 23:16:57,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 23:16:57,997 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 23:16:57,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-03 23:16:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 23:16:58,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:16:58,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:16:58,023 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:16:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:16:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1861478915, now seen corresponding path program 1 times [2021-11-03 23:16:58,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:16:58,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740304614] [2021-11-03 23:16:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:16:58,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:16:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:16:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:16:58,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:16:58,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740304614] [2021-11-03 23:16:58,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740304614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:16:58,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:16:58,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 23:16:58,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749699332] [2021-11-03 23:16:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:16:58,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 23:16:58,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:16:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 23:16:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 23:16:58,322 INFO L87 Difference]: Start difference. First operand has 134 states, 126 states have (on average 1.5238095238095237) internal successors, (192), 133 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:16:58,613 INFO L93 Difference]: Finished difference Result 264 states and 379 transitions. [2021-11-03 23:16:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 23:16:58,618 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 23:16:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:16:58,628 INFO L225 Difference]: With dead ends: 264 [2021-11-03 23:16:58,628 INFO L226 Difference]: Without dead ends: 129 [2021-11-03 23:16:58,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 23:16:58,641 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 247.65ms IncrementalHoareTripleChecker+Time [2021-11-03 23:16:58,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 175 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 247.65ms Time] [2021-11-03 23:16:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-03 23:16:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-03 23:16:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 128 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-11-03 23:16:58,683 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 40 [2021-11-03 23:16:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:16:58,684 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-11-03 23:16:58,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-11-03 23:16:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 23:16:58,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:16:58,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:16:58,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 23:16:58,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:16:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:16:58,687 INFO L85 PathProgramCache]: Analyzing trace with hash -836812353, now seen corresponding path program 1 times [2021-11-03 23:16:58,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:16:58,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379431334] [2021-11-03 23:16:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:16:58,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:16:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:16:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:16:58,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:16:58,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379431334] [2021-11-03 23:16:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379431334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:16:58,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:16:58,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:16:58,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791585735] [2021-11-03 23:16:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:16:58,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:16:58,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:16:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:16:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:16:58,793 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:16:59,007 INFO L93 Difference]: Finished difference Result 243 states and 323 transitions. [2021-11-03 23:16:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 23:16:59,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 23:16:59,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:16:59,009 INFO L225 Difference]: With dead ends: 243 [2021-11-03 23:16:59,009 INFO L226 Difference]: Without dead ends: 129 [2021-11-03 23:16:59,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.44ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:16:59,010 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.09ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 184.46ms IncrementalHoareTripleChecker+Time [2021-11-03 23:16:59,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 3.09ms Time], IncrementalHoareTripleChecker [4 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 184.46ms Time] [2021-11-03 23:16:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-03 23:16:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-03 23:16:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3770491803278688) internal successors, (168), 128 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2021-11-03 23:16:59,018 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 40 [2021-11-03 23:16:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:16:59,018 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2021-11-03 23:16:59,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2021-11-03 23:16:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 23:16:59,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:16:59,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:16:59,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 23:16:59,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:16:59,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:16:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1534926909, now seen corresponding path program 1 times [2021-11-03 23:16:59,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:16:59,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346579472] [2021-11-03 23:16:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:16:59,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:16:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:16:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:16:59,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:16:59,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346579472] [2021-11-03 23:16:59,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346579472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:16:59,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:16:59,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:16:59,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120097103] [2021-11-03 23:16:59,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:16:59,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:16:59,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:16:59,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:16:59,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:16:59,133 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:16:59,456 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2021-11-03 23:16:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 23:16:59,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 23:16:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:16:59,458 INFO L225 Difference]: With dead ends: 275 [2021-11-03 23:16:59,458 INFO L226 Difference]: Without dead ends: 179 [2021-11-03 23:16:59,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.50ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:16:59,460 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 233.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.43ms IncrementalHoareTripleChecker+Time [2021-11-03 23:16:59,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 503 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [2 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 295.43ms Time] [2021-11-03 23:16:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-03 23:16:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2021-11-03 23:16:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3688524590163935) internal successors, (167), 128 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2021-11-03 23:16:59,468 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 40 [2021-11-03 23:16:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:16:59,468 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2021-11-03 23:16:59,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2021-11-03 23:16:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 23:16:59,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:16:59,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:16:59,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 23:16:59,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:16:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:16:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash 199131234, now seen corresponding path program 1 times [2021-11-03 23:16:59,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:16:59,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643949405] [2021-11-03 23:16:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:16:59,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:16:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:16:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:16:59,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:16:59,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643949405] [2021-11-03 23:16:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643949405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:16:59,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:16:59,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 23:16:59,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928573353] [2021-11-03 23:16:59,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:16:59,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 23:16:59,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:16:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 23:16:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:16:59,556 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:16:59,862 INFO L93 Difference]: Finished difference Result 284 states and 361 transitions. [2021-11-03 23:16:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 23:16:59,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-03 23:16:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:16:59,864 INFO L225 Difference]: With dead ends: 284 [2021-11-03 23:16:59,864 INFO L226 Difference]: Without dead ends: 187 [2021-11-03 23:16:59,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.87ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 23:16:59,865 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 465 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.18ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.94ms IncrementalHoareTripleChecker+Time [2021-11-03 23:16:59,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 0 Invalid, 356 Unknown, 0 Unchecked, 4.18ms Time], IncrementalHoareTripleChecker [7 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 261.94ms Time] [2021-11-03 23:16:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-03 23:16:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-11-03 23:16:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 128 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2021-11-03 23:16:59,873 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 42 [2021-11-03 23:16:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:16:59,874 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2021-11-03 23:16:59,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:16:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2021-11-03 23:16:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 23:16:59,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:16:59,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:16:59,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 23:16:59,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:16:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:16:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash 496706596, now seen corresponding path program 1 times [2021-11-03 23:16:59,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:16:59,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740366779] [2021-11-03 23:16:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:16:59,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:16:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:16:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:16:59,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:16:59,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740366779] [2021-11-03 23:16:59,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740366779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:16:59,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:16:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 23:16:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373471774] [2021-11-03 23:16:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:16:59,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 23:16:59,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:16:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 23:16:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 23:16:59,951 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:00,381 INFO L93 Difference]: Finished difference Result 379 states and 479 transitions. [2021-11-03 23:17:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 23:17:00,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-03 23:17:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:00,382 INFO L225 Difference]: With dead ends: 379 [2021-11-03 23:17:00,383 INFO L226 Difference]: Without dead ends: 281 [2021-11-03 23:17:00,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.91ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:17:00,384 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 773 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.47ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 366.53ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:00,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 0 Invalid, 594 Unknown, 0 Unchecked, 5.47ms Time], IncrementalHoareTripleChecker [16 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 366.53ms Time] [2021-11-03 23:17:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-03 23:17:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 131. [2021-11-03 23:17:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.346774193548387) internal successors, (167), 130 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-11-03 23:17:00,393 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 44 [2021-11-03 23:17:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:00,394 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-11-03 23:17:00,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-11-03 23:17:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 23:17:00,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:00,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:00,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 23:17:00,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1200660794, now seen corresponding path program 1 times [2021-11-03 23:17:00,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:00,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196049732] [2021-11-03 23:17:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:00,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:00,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:00,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196049732] [2021-11-03 23:17:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196049732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:00,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:00,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 23:17:00,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399817575] [2021-11-03 23:17:00,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:00,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 23:17:00,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 23:17:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 23:17:00,485 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:00,915 INFO L93 Difference]: Finished difference Result 381 states and 479 transitions. [2021-11-03 23:17:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 23:17:00,915 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 23:17:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:00,916 INFO L225 Difference]: With dead ends: 381 [2021-11-03 23:17:00,916 INFO L226 Difference]: Without dead ends: 282 [2021-11-03 23:17:00,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.39ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 23:17:00,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 874 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.06ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 334.14ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:00,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 0 Invalid, 530 Unknown, 0 Unchecked, 5.06ms Time], IncrementalHoareTripleChecker [21 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 334.14ms Time] [2021-11-03 23:17:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-03 23:17:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 133. [2021-11-03 23:17:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 132 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2021-11-03 23:17:00,925 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 45 [2021-11-03 23:17:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:00,925 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2021-11-03 23:17:00,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2021-11-03 23:17:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 23:17:00,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:00,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:00,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 23:17:00,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1737555954, now seen corresponding path program 1 times [2021-11-03 23:17:00,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:00,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713210035] [2021-11-03 23:17:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:00,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:01,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:01,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713210035] [2021-11-03 23:17:01,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713210035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:01,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:01,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:17:01,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062316358] [2021-11-03 23:17:01,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:01,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:17:01,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:17:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:17:01,012 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:01,268 INFO L93 Difference]: Finished difference Result 261 states and 334 transitions. [2021-11-03 23:17:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:17:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 23:17:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:01,269 INFO L225 Difference]: With dead ends: 261 [2021-11-03 23:17:01,269 INFO L226 Difference]: Without dead ends: 153 [2021-11-03 23:17:01,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.48ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:17:01,270 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.51ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:01,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 531 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [17 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 234.51ms Time] [2021-11-03 23:17:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-03 23:17:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 143. [2021-11-03 23:17:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 136 states have (on average 1.3161764705882353) internal successors, (179), 142 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2021-11-03 23:17:01,276 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 50 [2021-11-03 23:17:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:01,276 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2021-11-03 23:17:01,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2021-11-03 23:17:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 23:17:01,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:01,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:01,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 23:17:01,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1603542448, now seen corresponding path program 1 times [2021-11-03 23:17:01,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:01,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211573852] [2021-11-03 23:17:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:01,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:01,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:01,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211573852] [2021-11-03 23:17:01,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211573852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:01,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:01,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 23:17:01,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045784408] [2021-11-03 23:17:01,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:01,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 23:17:01,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 23:17:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 23:17:01,345 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:01,761 INFO L93 Difference]: Finished difference Result 417 states and 518 transitions. [2021-11-03 23:17:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 23:17:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 23:17:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:01,763 INFO L225 Difference]: With dead ends: 417 [2021-11-03 23:17:01,763 INFO L226 Difference]: Without dead ends: 299 [2021-11-03 23:17:01,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.70ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 23:17:01,764 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 850 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 349.83ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:01,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 0 Invalid, 708 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [29 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 349.83ms Time] [2021-11-03 23:17:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-03 23:17:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 145. [2021-11-03 23:17:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.3115942028985508) internal successors, (181), 144 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 181 transitions. [2021-11-03 23:17:01,769 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 181 transitions. Word has length 50 [2021-11-03 23:17:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:01,769 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 181 transitions. [2021-11-03 23:17:01,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 181 transitions. [2021-11-03 23:17:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 23:17:01,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:01,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:01,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 23:17:01,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1675516340, now seen corresponding path program 1 times [2021-11-03 23:17:01,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:01,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247891355] [2021-11-03 23:17:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:01,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:01,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:01,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247891355] [2021-11-03 23:17:01,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247891355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:01,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:01,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 23:17:01,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190871158] [2021-11-03 23:17:01,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:01,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 23:17:01,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:01,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 23:17:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:17:01,830 INFO L87 Difference]: Start difference. First operand 145 states and 181 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:02,242 INFO L93 Difference]: Finished difference Result 371 states and 452 transitions. [2021-11-03 23:17:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 23:17:02,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 23:17:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:02,244 INFO L225 Difference]: With dead ends: 371 [2021-11-03 23:17:02,244 INFO L226 Difference]: Without dead ends: 263 [2021-11-03 23:17:02,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.91ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 23:17:02,245 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 298.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.46ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 370.06ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:02,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 812 Unknown, 0 Unchecked, 3.46ms Time], IncrementalHoareTripleChecker [7 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 370.06ms Time] [2021-11-03 23:17:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-03 23:17:02,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-11-03 23:17:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.3043478260869565) internal successors, (180), 144 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2021-11-03 23:17:02,255 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 50 [2021-11-03 23:17:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:02,257 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2021-11-03 23:17:02,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2021-11-03 23:17:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 23:17:02,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:02,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:02,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 23:17:02,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1963585782, now seen corresponding path program 1 times [2021-11-03 23:17:02,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:02,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742819934] [2021-11-03 23:17:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:02,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:02,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:02,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742819934] [2021-11-03 23:17:02,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742819934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:02,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537976132] [2021-11-03 23:17:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:02,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:02,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:02,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 23:17:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-03 23:17:02,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:02,608 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:17:02,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 23:17:02,627 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 23:17:02,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 23:17:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:05,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:17:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:05,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537976132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:17:05,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:17:05,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 24 [2021-11-03 23:17:05,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055699430] [2021-11-03 23:17:05,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:17:05,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 23:17:05,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 23:17:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-11-03 23:17:05,923 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:09,137 INFO L93 Difference]: Finished difference Result 1007 states and 1220 transitions. [2021-11-03 23:17:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-03 23:17:09,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 23:17:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:09,142 INFO L225 Difference]: With dead ends: 1007 [2021-11-03 23:17:09,142 INFO L226 Difference]: Without dead ends: 898 [2021-11-03 23:17:09,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 2905.46ms TimeCoverageRelationStatistics Valid=627, Invalid=4065, Unknown=0, NotChecked=0, Total=4692 [2021-11-03 23:17:09,144 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1598 mSDsluCounter, 3834 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1434.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.80ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2065 IncrementalHoareTripleChecker+Unchecked, 1744.50ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:09,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 0 Invalid, 5785 Unknown, 0 Unchecked, 24.80ms Time], IncrementalHoareTripleChecker [69 Valid, 3651 Invalid, 0 Unknown, 2065 Unchecked, 1744.50ms Time] [2021-11-03 23:17:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-03 23:17:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 194. [2021-11-03 23:17:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 187 states have (on average 1.3101604278074865) internal successors, (245), 193 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 245 transitions. [2021-11-03 23:17:09,158 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 245 transitions. Word has length 52 [2021-11-03 23:17:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:09,158 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 245 transitions. [2021-11-03 23:17:09,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 245 transitions. [2021-11-03 23:17:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 23:17:09,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:09,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:09,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 23:17:09,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-03 23:17:09,378 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2025625396, now seen corresponding path program 1 times [2021-11-03 23:17:09,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:09,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270011560] [2021-11-03 23:17:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:09,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:09,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:09,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270011560] [2021-11-03 23:17:09,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270011560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:09,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:09,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-03 23:17:09,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861418397] [2021-11-03 23:17:09,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:09,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 23:17:09,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 23:17:09,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-03 23:17:09,545 INFO L87 Difference]: Start difference. First operand 194 states and 245 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:10,599 INFO L93 Difference]: Finished difference Result 820 states and 1012 transitions. [2021-11-03 23:17:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-03 23:17:10,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 23:17:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:10,602 INFO L225 Difference]: With dead ends: 820 [2021-11-03 23:17:10,602 INFO L226 Difference]: Without dead ends: 667 [2021-11-03 23:17:10,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 209.68ms TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2021-11-03 23:17:10,603 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1438 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 653.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.77ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 800.68ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:10,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 0 Invalid, 1965 Unknown, 0 Unchecked, 6.77ms Time], IncrementalHoareTripleChecker [109 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 800.68ms Time] [2021-11-03 23:17:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-03 23:17:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 203. [2021-11-03 23:17:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 196 states have (on average 1.2857142857142858) internal successors, (252), 202 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 252 transitions. [2021-11-03 23:17:10,614 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 252 transitions. Word has length 52 [2021-11-03 23:17:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:10,614 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 252 transitions. [2021-11-03 23:17:10,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 252 transitions. [2021-11-03 23:17:10,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 23:17:10,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:10,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:10,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 23:17:10,617 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1891199224, now seen corresponding path program 1 times [2021-11-03 23:17:10,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:10,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619924182] [2021-11-03 23:17:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:10,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:17:10,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:10,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619924182] [2021-11-03 23:17:10,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619924182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:10,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:10,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 23:17:10,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425593097] [2021-11-03 23:17:10,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:10,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 23:17:10,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 23:17:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 23:17:10,673 INFO L87 Difference]: Start difference. First operand 203 states and 252 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:10,852 INFO L93 Difference]: Finished difference Result 372 states and 467 transitions. [2021-11-03 23:17:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 23:17:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 23:17:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:10,854 INFO L225 Difference]: With dead ends: 372 [2021-11-03 23:17:10,854 INFO L226 Difference]: Without dead ends: 207 [2021-11-03 23:17:10,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.14ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 23:17:10,855 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.60ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.34ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:10,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 333 Unknown, 0 Unchecked, 0.60ms Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 161.34ms Time] [2021-11-03 23:17:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-03 23:17:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-11-03 23:17:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 198 states have (on average 1.2676767676767677) internal successors, (251), 204 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 251 transitions. [2021-11-03 23:17:10,865 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 251 transitions. Word has length 52 [2021-11-03 23:17:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:10,867 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 251 transitions. [2021-11-03 23:17:10,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 251 transitions. [2021-11-03 23:17:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 23:17:10,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:10,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:10,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 23:17:10,868 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:10,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1119580280, now seen corresponding path program 1 times [2021-11-03 23:17:10,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:10,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923448403] [2021-11-03 23:17:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:10,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:17:10,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:10,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923448403] [2021-11-03 23:17:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923448403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:10,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:10,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:17:10,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650395877] [2021-11-03 23:17:10,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:10,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:17:10,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:10,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:17:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:17:10,917 INFO L87 Difference]: Start difference. First operand 205 states and 251 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:11,155 INFO L93 Difference]: Finished difference Result 377 states and 469 transitions. [2021-11-03 23:17:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:17:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 23:17:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:11,157 INFO L225 Difference]: With dead ends: 377 [2021-11-03 23:17:11,157 INFO L226 Difference]: Without dead ends: 206 [2021-11-03 23:17:11,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.74ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:17:11,158 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 213.62ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:11,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 509 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [8 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 213.62ms Time] [2021-11-03 23:17:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-03 23:17:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-11-03 23:17:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 193 states have (on average 1.2642487046632125) internal successors, (244), 199 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2021-11-03 23:17:11,166 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 52 [2021-11-03 23:17:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:11,166 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2021-11-03 23:17:11,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2021-11-03 23:17:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 23:17:11,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:11,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:11,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 23:17:11,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1671849992, now seen corresponding path program 1 times [2021-11-03 23:17:11,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:11,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526016331] [2021-11-03 23:17:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:11,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:17:11,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:11,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526016331] [2021-11-03 23:17:11,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526016331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:11,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:11,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:17:11,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100904186] [2021-11-03 23:17:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:11,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:17:11,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:17:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:17:11,214 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:11,467 INFO L93 Difference]: Finished difference Result 356 states and 437 transitions. [2021-11-03 23:17:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:17:11,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 23:17:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:11,469 INFO L225 Difference]: With dead ends: 356 [2021-11-03 23:17:11,469 INFO L226 Difference]: Without dead ends: 188 [2021-11-03 23:17:11,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.80ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:17:11,470 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.36ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:11,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 518 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [8 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 231.36ms Time] [2021-11-03 23:17:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-03 23:17:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2021-11-03 23:17:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 173 states have (on average 1.2485549132947977) internal successors, (216), 179 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 216 transitions. [2021-11-03 23:17:11,482 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 216 transitions. Word has length 52 [2021-11-03 23:17:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 216 transitions. [2021-11-03 23:17:11,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 216 transitions. [2021-11-03 23:17:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 23:17:11,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:11,484 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:11,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 23:17:11,484 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1322921012, now seen corresponding path program 1 times [2021-11-03 23:17:11,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:11,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641186072] [2021-11-03 23:17:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:11,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:11,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:11,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641186072] [2021-11-03 23:17:11,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641186072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:11,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584917371] [2021-11-03 23:17:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:11,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:11,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:11,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:11,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 23:17:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:11,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 23:17:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:11,988 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:17:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 23:17:12,007 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 23:17:12,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 23:17:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:17:13,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-03 23:17:13,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584917371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:13,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 23:17:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2021-11-03 23:17:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777719370] [2021-11-03 23:17:13,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:13,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 23:17:13,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 23:17:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-11-03 23:17:13,463 INFO L87 Difference]: Start difference. First operand 180 states and 216 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:13,677 INFO L93 Difference]: Finished difference Result 295 states and 357 transitions. [2021-11-03 23:17:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 23:17:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 23:17:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:13,679 INFO L225 Difference]: With dead ends: 295 [2021-11-03 23:17:13,679 INFO L226 Difference]: Without dead ends: 206 [2021-11-03 23:17:13,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 360.03ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-11-03 23:17:13,680 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 167.50ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:13,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 959 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [0 Valid, 337 Invalid, 0 Unknown, 622 Unchecked, 167.50ms Time] [2021-11-03 23:17:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-03 23:17:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-03 23:17:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.256281407035176) internal successors, (250), 205 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 250 transitions. [2021-11-03 23:17:13,694 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 250 transitions. Word has length 53 [2021-11-03 23:17:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:13,694 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 250 transitions. [2021-11-03 23:17:13,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 250 transitions. [2021-11-03 23:17:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 23:17:13,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:13,696 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:13,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-03 23:17:13,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-03 23:17:13,907 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1324768054, now seen corresponding path program 1 times [2021-11-03 23:17:13,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:13,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088829191] [2021-11-03 23:17:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:13,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:14,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:14,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088829191] [2021-11-03 23:17:14,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088829191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:14,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296391998] [2021-11-03 23:17:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:14,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:14,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:14,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 23:17:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 23:17:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:14,409 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-03 23:17:14,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2021-11-03 23:17:14,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-03 23:17:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:17:14,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-03 23:17:14,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296391998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:14,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 23:17:14,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 21 [2021-11-03 23:17:14,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281130257] [2021-11-03 23:17:14,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:14,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 23:17:14,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 23:17:14,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-03 23:17:14,845 INFO L87 Difference]: Start difference. First operand 206 states and 250 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:15,706 INFO L93 Difference]: Finished difference Result 500 states and 605 transitions. [2021-11-03 23:17:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 23:17:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 23:17:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:15,708 INFO L225 Difference]: With dead ends: 500 [2021-11-03 23:17:15,708 INFO L226 Difference]: Without dead ends: 404 [2021-11-03 23:17:15,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 454.12ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-11-03 23:17:15,709 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 899 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 484.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.81ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 591.78ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:15,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 0 Invalid, 1326 Unknown, 0 Unchecked, 4.81ms Time], IncrementalHoareTripleChecker [35 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 591.78ms Time] [2021-11-03 23:17:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-03 23:17:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 284. [2021-11-03 23:17:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 277 states have (on average 1.2310469314079422) internal successors, (341), 283 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 341 transitions. [2021-11-03 23:17:15,744 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 341 transitions. Word has length 53 [2021-11-03 23:17:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:15,744 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 341 transitions. [2021-11-03 23:17:15,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 341 transitions. [2021-11-03 23:17:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 23:17:15,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:15,745 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:15,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-03 23:17:15,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:15,964 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1195191880, now seen corresponding path program 1 times [2021-11-03 23:17:15,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:15,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677777370] [2021-11-03 23:17:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:15,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:16,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:16,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677777370] [2021-11-03 23:17:16,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677777370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:16,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734575477] [2021-11-03 23:17:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:16,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:16,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:16,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:16,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 23:17:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:16,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-03 23:17:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:16,465 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:17:16,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 23:17:16,482 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 23:17:16,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 23:17:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:17:18,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-03 23:17:18,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734575477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:18,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 23:17:18,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 23 [2021-11-03 23:17:18,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639130376] [2021-11-03 23:17:18,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:18,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 23:17:18,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:18,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 23:17:18,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-03 23:17:18,058 INFO L87 Difference]: Start difference. First operand 284 states and 341 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:18,245 INFO L93 Difference]: Finished difference Result 377 states and 451 transitions. [2021-11-03 23:17:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 23:17:18,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 23:17:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:18,247 INFO L225 Difference]: With dead ends: 377 [2021-11-03 23:17:18,247 INFO L226 Difference]: Without dead ends: 285 [2021-11-03 23:17:18,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 443.90ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-11-03 23:17:18,247 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 127.50ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:18,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 1269 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [1 Valid, 483 Invalid, 0 Unknown, 785 Unchecked, 127.50ms Time] [2021-11-03 23:17:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-03 23:17:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2021-11-03 23:17:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 277 states have (on average 1.2238267148014441) internal successors, (339), 283 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 339 transitions. [2021-11-03 23:17:18,273 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 339 transitions. Word has length 53 [2021-11-03 23:17:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:18,273 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 339 transitions. [2021-11-03 23:17:18,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 339 transitions. [2021-11-03 23:17:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 23:17:18,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:18,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:18,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 23:17:18,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-03 23:17:18,474 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -515133510, now seen corresponding path program 1 times [2021-11-03 23:17:18,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:18,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808224477] [2021-11-03 23:17:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:18,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:18,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:18,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808224477] [2021-11-03 23:17:18,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808224477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:18,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435806457] [2021-11-03 23:17:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:18,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:18,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:18,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:18,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 23:17:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-03 23:17:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:18,786 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:17:18,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 23:17:20,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-03 23:17:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:17:20,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 333 [2021-11-03 23:17:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:20,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435806457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:17:20,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:17:20,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 28 [2021-11-03 23:17:20,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156376081] [2021-11-03 23:17:20,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:17:20,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-03 23:17:20,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-03 23:17:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-11-03 23:17:20,484 INFO L87 Difference]: Start difference. First operand 284 states and 339 transitions. Second operand has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:21,287 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2021-11-03 23:17:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 23:17:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 23:17:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:21,289 INFO L225 Difference]: With dead ends: 478 [2021-11-03 23:17:21,289 INFO L226 Difference]: Without dead ends: 384 [2021-11-03 23:17:21,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1124.07ms TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 23:17:21,290 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 150 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 502.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 621.75ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:21,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 0 Invalid, 1888 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [8 Valid, 1567 Invalid, 0 Unknown, 313 Unchecked, 621.75ms Time] [2021-11-03 23:17:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-03 23:17:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 312. [2021-11-03 23:17:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 305 states have (on average 1.2131147540983607) internal successors, (370), 311 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 370 transitions. [2021-11-03 23:17:21,308 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 370 transitions. Word has length 53 [2021-11-03 23:17:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:21,308 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 370 transitions. [2021-11-03 23:17:21,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 370 transitions. [2021-11-03 23:17:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 23:17:21,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:21,309 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:21,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-03 23:17:21,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-03 23:17:21,528 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1401036871, now seen corresponding path program 1 times [2021-11-03 23:17:21,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:21,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028085066] [2021-11-03 23:17:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:21,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:17:21,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:21,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028085066] [2021-11-03 23:17:21,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028085066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:21,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:21,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 23:17:21,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355735515] [2021-11-03 23:17:21,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:21,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 23:17:21,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 23:17:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 23:17:21,592 INFO L87 Difference]: Start difference. First operand 312 states and 370 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:21,788 INFO L93 Difference]: Finished difference Result 402 states and 477 transitions. [2021-11-03 23:17:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:17:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 23:17:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:21,790 INFO L225 Difference]: With dead ends: 402 [2021-11-03 23:17:21,790 INFO L226 Difference]: Without dead ends: 312 [2021-11-03 23:17:21,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.33ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 23:17:21,790 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 525 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.71ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:21,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 0 Invalid, 227 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [16 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 167.71ms Time] [2021-11-03 23:17:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-03 23:17:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-11-03 23:17:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 305 states have (on average 1.2098360655737705) internal successors, (369), 311 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 369 transitions. [2021-11-03 23:17:21,803 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 369 transitions. Word has length 55 [2021-11-03 23:17:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:21,804 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 369 transitions. [2021-11-03 23:17:21,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 369 transitions. [2021-11-03 23:17:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 23:17:21,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:21,805 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:21,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 23:17:21,805 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash 619543768, now seen corresponding path program 1 times [2021-11-03 23:17:21,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:21,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268111676] [2021-11-03 23:17:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:21,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:17:22,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:22,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268111676] [2021-11-03 23:17:22,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268111676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:22,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459002093] [2021-11-03 23:17:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:22,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:22,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:22,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 23:17:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:22,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-03 23:17:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:22,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 23:17:22,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 23:17:22,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-03 23:17:22,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-03 23:17:22,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:22,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:22,378 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-03 23:17:22,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 47 [2021-11-03 23:17:23,149 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-11-03 23:17:23,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 35 [2021-11-03 23:17:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:23,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:17:24,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1653 treesize of output 1637 [2021-11-03 23:17:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:25,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459002093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:17:25,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:17:25,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2021-11-03 23:17:25,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880073563] [2021-11-03 23:17:25,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:17:25,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 23:17:25,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 23:17:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-03 23:17:25,293 INFO L87 Difference]: Start difference. First operand 312 states and 369 transitions. Second operand has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:29,694 INFO L93 Difference]: Finished difference Result 1751 states and 2059 transitions. [2021-11-03 23:17:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-03 23:17:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 23:17:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:29,699 INFO L225 Difference]: With dead ends: 1751 [2021-11-03 23:17:29,699 INFO L226 Difference]: Without dead ends: 1587 [2021-11-03 23:17:29,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 3283.78ms TimeCoverageRelationStatistics Valid=782, Invalid=4620, Unknown=0, NotChecked=0, Total=5402 [2021-11-03 23:17:29,701 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4188 mSDsluCounter, 5937 mSDsCounter, 0 mSdLazyCounter, 5834 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2034.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4188 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.24ms SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 5834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2170 IncrementalHoareTripleChecker+Unchecked, 2508.44ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:29,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4188 Valid, 0 Invalid, 8156 Unknown, 0 Unchecked, 25.24ms Time], IncrementalHoareTripleChecker [152 Valid, 5834 Invalid, 0 Unknown, 2170 Unchecked, 2508.44ms Time] [2021-11-03 23:17:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-11-03 23:17:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 286. [2021-11-03 23:17:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 279 states have (on average 1.2150537634408602) internal successors, (339), 285 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 339 transitions. [2021-11-03 23:17:29,721 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 339 transitions. Word has length 55 [2021-11-03 23:17:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:29,722 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 339 transitions. [2021-11-03 23:17:29,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 339 transitions. [2021-11-03 23:17:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 23:17:29,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:29,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:29,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 23:17:29,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:29,925 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1939570492, now seen corresponding path program 1 times [2021-11-03 23:17:29,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:29,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610452862] [2021-11-03 23:17:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:29,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:17:29,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:29,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610452862] [2021-11-03 23:17:29,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610452862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:29,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:29,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 23:17:29,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473120050] [2021-11-03 23:17:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:29,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 23:17:29,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 23:17:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 23:17:29,996 INFO L87 Difference]: Start difference. First operand 286 states and 339 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:30,323 INFO L93 Difference]: Finished difference Result 564 states and 674 transitions. [2021-11-03 23:17:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 23:17:30,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 23:17:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:30,325 INFO L225 Difference]: With dead ends: 564 [2021-11-03 23:17:30,325 INFO L226 Difference]: Without dead ends: 389 [2021-11-03 23:17:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.08ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:17:30,326 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 297.43ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:30,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 634 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [12 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 297.43ms Time] [2021-11-03 23:17:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-03 23:17:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 276. [2021-11-03 23:17:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 269 states have (on average 1.1970260223048328) internal successors, (322), 275 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 322 transitions. [2021-11-03 23:17:30,340 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 322 transitions. Word has length 60 [2021-11-03 23:17:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:30,340 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 322 transitions. [2021-11-03 23:17:30,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 322 transitions. [2021-11-03 23:17:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 23:17:30,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:30,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:30,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 23:17:30,343 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1492137016, now seen corresponding path program 2 times [2021-11-03 23:17:30,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:30,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874531410] [2021-11-03 23:17:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:30,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 23:17:30,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:30,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874531410] [2021-11-03 23:17:30,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874531410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:30,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:30,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 23:17:30,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762193565] [2021-11-03 23:17:30,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:30,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 23:17:30,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 23:17:30,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 23:17:30,405 INFO L87 Difference]: Start difference. First operand 276 states and 322 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:30,732 INFO L93 Difference]: Finished difference Result 550 states and 642 transitions. [2021-11-03 23:17:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 23:17:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 23:17:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:30,734 INFO L225 Difference]: With dead ends: 550 [2021-11-03 23:17:30,735 INFO L226 Difference]: Without dead ends: 401 [2021-11-03 23:17:30,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.04ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 23:17:30,736 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 227 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.49ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:30,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 0 Invalid, 914 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [10 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 273.49ms Time] [2021-11-03 23:17:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-03 23:17:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 276. [2021-11-03 23:17:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 269 states have (on average 1.1821561338289963) internal successors, (318), 275 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 318 transitions. [2021-11-03 23:17:30,761 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 318 transitions. Word has length 60 [2021-11-03 23:17:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:30,761 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 318 transitions. [2021-11-03 23:17:30,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 318 transitions. [2021-11-03 23:17:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 23:17:30,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:30,762 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:30,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 23:17:30,763 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash -268357848, now seen corresponding path program 2 times [2021-11-03 23:17:30,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:30,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221130633] [2021-11-03 23:17:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:30,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:17:30,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:30,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221130633] [2021-11-03 23:17:30,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221130633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:30,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177303964] [2021-11-03 23:17:30,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 23:17:30,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:30,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:30,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:30,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 23:17:30,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 23:17:30,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 23:17:30,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-03 23:17:30,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:31,000 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-03 23:17:31,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-03 23:17:31,011 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-03 23:17:31,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-03 23:17:32,485 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-03 23:17:32,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 92 [2021-11-03 23:17:32,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:32,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 95 [2021-11-03 23:17:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 23:17:32,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-03 23:17:32,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177303964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:32,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 23:17:32,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 17 [2021-11-03 23:17:32,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281963083] [2021-11-03 23:17:32,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:32,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 23:17:32,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 23:17:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-11-03 23:17:32,649 INFO L87 Difference]: Start difference. First operand 276 states and 318 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:32,871 INFO L93 Difference]: Finished difference Result 369 states and 427 transitions. [2021-11-03 23:17:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 23:17:32,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 23:17:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:32,873 INFO L225 Difference]: With dead ends: 369 [2021-11-03 23:17:32,873 INFO L226 Difference]: Without dead ends: 277 [2021-11-03 23:17:32,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 251.72ms TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-03 23:17:32,874 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 179.41ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:32,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 1274 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [1 Valid, 475 Invalid, 0 Unknown, 798 Unchecked, 179.41ms Time] [2021-11-03 23:17:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-03 23:17:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2021-11-03 23:17:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 269 states have (on average 1.174721189591078) internal successors, (316), 275 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2021-11-03 23:17:32,888 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 61 [2021-11-03 23:17:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:32,888 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2021-11-03 23:17:32,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:32,888 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2021-11-03 23:17:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 23:17:32,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:32,889 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:32,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 23:17:33,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:33,113 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash -802042588, now seen corresponding path program 1 times [2021-11-03 23:17:33,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:33,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093925247] [2021-11-03 23:17:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:33,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:33,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093925247] [2021-11-03 23:17:33,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093925247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:33,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860267862] [2021-11-03 23:17:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:33,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:33,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:33,272 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:33,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 23:17:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-03 23:17:33,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-03 23:17:33,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:33,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-03 23:17:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:33,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:17:33,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-03 23:17:33,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:33,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-03 23:17:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:33,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860267862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:17:33,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:17:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2021-11-03 23:17:33,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848626970] [2021-11-03 23:17:33,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:17:33,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 23:17:33,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 23:17:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-11-03 23:17:33,856 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:34,672 INFO L93 Difference]: Finished difference Result 504 states and 585 transitions. [2021-11-03 23:17:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 23:17:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 23:17:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:34,673 INFO L225 Difference]: With dead ends: 504 [2021-11-03 23:17:34,673 INFO L226 Difference]: Without dead ends: 355 [2021-11-03 23:17:34,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 332.74ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-11-03 23:17:34,675 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 177 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 538.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.40ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 638.77ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:34,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 0 Invalid, 2165 Unknown, 0 Unchecked, 3.40ms Time], IncrementalHoareTripleChecker [20 Valid, 2093 Invalid, 0 Unknown, 52 Unchecked, 638.77ms Time] [2021-11-03 23:17:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-03 23:17:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 286. [2021-11-03 23:17:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 279 states have (on average 1.168458781362007) internal successors, (326), 285 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 326 transitions. [2021-11-03 23:17:34,692 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 326 transitions. Word has length 61 [2021-11-03 23:17:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:34,692 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 326 transitions. [2021-11-03 23:17:34,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 326 transitions. [2021-11-03 23:17:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 23:17:34,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:34,694 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:34,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 23:17:34,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-03 23:17:34,907 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash -230671802, now seen corresponding path program 2 times [2021-11-03 23:17:34,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:34,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296249740] [2021-11-03 23:17:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:34,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 23:17:35,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:35,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296249740] [2021-11-03 23:17:35,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296249740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:35,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:35,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 23:17:35,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440551443] [2021-11-03 23:17:35,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:35,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 23:17:35,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 23:17:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-03 23:17:35,083 INFO L87 Difference]: Start difference. First operand 286 states and 326 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:35,785 INFO L93 Difference]: Finished difference Result 488 states and 566 transitions. [2021-11-03 23:17:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 23:17:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 23:17:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:35,787 INFO L225 Difference]: With dead ends: 488 [2021-11-03 23:17:35,787 INFO L226 Difference]: Without dead ends: 400 [2021-11-03 23:17:35,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.70ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-03 23:17:35,788 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 676 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 501.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.39ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 604.02ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:35,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 0 Invalid, 1323 Unknown, 0 Unchecked, 4.39ms Time], IncrementalHoareTripleChecker [38 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 604.02ms Time] [2021-11-03 23:17:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-03 23:17:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 340. [2021-11-03 23:17:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 333 states have (on average 1.1801801801801801) internal successors, (393), 339 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 393 transitions. [2021-11-03 23:17:35,808 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 393 transitions. Word has length 63 [2021-11-03 23:17:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:35,809 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 393 transitions. [2021-11-03 23:17:35,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 393 transitions. [2021-11-03 23:17:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 23:17:35,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:35,809 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:35,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-03 23:17:35,810 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:35,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1369508788, now seen corresponding path program 1 times [2021-11-03 23:17:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:35,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514869860] [2021-11-03 23:17:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:35,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 23:17:35,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:35,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514869860] [2021-11-03 23:17:35,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514869860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:35,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:17:35,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 23:17:35,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018045110] [2021-11-03 23:17:35,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:35,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 23:17:35,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 23:17:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 23:17:35,875 INFO L87 Difference]: Start difference. First operand 340 states and 393 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:36,068 INFO L93 Difference]: Finished difference Result 432 states and 500 transitions. [2021-11-03 23:17:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 23:17:36,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 23:17:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:36,071 INFO L225 Difference]: With dead ends: 432 [2021-11-03 23:17:36,071 INFO L226 Difference]: Without dead ends: 338 [2021-11-03 23:17:36,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.50ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 23:17:36,072 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 249 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.32ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:36,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 161.32ms Time] [2021-11-03 23:17:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-03 23:17:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2021-11-03 23:17:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 331 states have (on average 1.1752265861027191) internal successors, (389), 337 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 389 transitions. [2021-11-03 23:17:36,097 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 389 transitions. Word has length 63 [2021-11-03 23:17:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:36,097 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 389 transitions. [2021-11-03 23:17:36,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 389 transitions. [2021-11-03 23:17:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 23:17:36,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:36,098 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:36,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-03 23:17:36,099 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1567579282, now seen corresponding path program 2 times [2021-11-03 23:17:36,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:36,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107498385] [2021-11-03 23:17:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:36,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:17:36,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:36,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107498385] [2021-11-03 23:17:36,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107498385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:36,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802490182] [2021-11-03 23:17:36,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 23:17:36,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:36,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:36,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:36,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 23:17:36,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 23:17:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 23:17:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 23:17:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:36,346 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:17:36,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 23:17:36,372 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 23:17:36,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 23:17:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-03 23:17:38,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-03 23:17:38,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802490182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:17:38,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 23:17:38,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-03 23:17:38,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975893529] [2021-11-03 23:17:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:38,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 23:17:38,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 23:17:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-03 23:17:38,180 INFO L87 Difference]: Start difference. First operand 338 states and 389 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:38,359 INFO L93 Difference]: Finished difference Result 452 states and 528 transitions. [2021-11-03 23:17:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 23:17:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 23:17:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:38,360 INFO L225 Difference]: With dead ends: 452 [2021-11-03 23:17:38,360 INFO L226 Difference]: Without dead ends: 338 [2021-11-03 23:17:38,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 221.04ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-03 23:17:38,361 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 137.63ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:38,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 923 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [0 Valid, 325 Invalid, 0 Unknown, 598 Unchecked, 137.63ms Time] [2021-11-03 23:17:38,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-03 23:17:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 332. [2021-11-03 23:17:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 325 states have (on average 1.1723076923076923) internal successors, (381), 331 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 381 transitions. [2021-11-03 23:17:38,380 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 381 transitions. Word has length 69 [2021-11-03 23:17:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:38,381 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 381 transitions. [2021-11-03 23:17:38,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 381 transitions. [2021-11-03 23:17:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 23:17:38,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:38,382 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:38,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-03 23:17:38,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-03 23:17:38,600 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:38,601 INFO L85 PathProgramCache]: Analyzing trace with hash -950533610, now seen corresponding path program 1 times [2021-11-03 23:17:38,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:38,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027909099] [2021-11-03 23:17:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:38,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 23:17:38,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:38,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027909099] [2021-11-03 23:17:38,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027909099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:38,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429731276] [2021-11-03 23:17:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:38,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:38,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:38,692 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:38,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 23:17:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 23:17:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:39,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:39,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-11-03 23:17:39,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:39,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 37 [2021-11-03 23:17:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 23:17:39,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:17:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 23:17:39,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429731276] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:39,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 23:17:39,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 14 [2021-11-03 23:17:39,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364988391] [2021-11-03 23:17:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:17:39,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 23:17:39,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:17:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 23:17:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-03 23:17:39,220 INFO L87 Difference]: Start difference. First operand 332 states and 381 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:17:39,877 INFO L93 Difference]: Finished difference Result 750 states and 888 transitions. [2021-11-03 23:17:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 23:17:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 23:17:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:17:39,879 INFO L225 Difference]: With dead ends: 750 [2021-11-03 23:17:39,879 INFO L226 Difference]: Without dead ends: 516 [2021-11-03 23:17:39,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 172.90ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-03 23:17:39,880 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 259 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 463.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 561.55ms IncrementalHoareTripleChecker+Time [2021-11-03 23:17:39,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 0 Invalid, 1291 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [20 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 561.55ms Time] [2021-11-03 23:17:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-03 23:17:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 278. [2021-11-03 23:17:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 271 states have (on average 1.1808118081180812) internal successors, (320), 277 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 320 transitions. [2021-11-03 23:17:39,898 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 320 transitions. Word has length 69 [2021-11-03 23:17:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:17:39,899 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 320 transitions. [2021-11-03 23:17:39,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:17:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 320 transitions. [2021-11-03 23:17:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 23:17:39,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:17:39,900 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:17:39,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 23:17:40,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-03 23:17:40,119 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:17:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:17:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash -414228359, now seen corresponding path program 1 times [2021-11-03 23:17:40,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:17:40,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198725221] [2021-11-03 23:17:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:40,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:17:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:40,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:17:40,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198725221] [2021-11-03 23:17:40,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198725221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:17:40,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254431016] [2021-11-03 23:17:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:17:40,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:17:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:17:40,419 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:17:40,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-03 23:17:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:17:40,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-03 23:17:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:17:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:40,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-03 23:17:40,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:40,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:40,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-03 23:17:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:41,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:41,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-03 23:17:41,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:41,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:41,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 23:17:41,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:41,229 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-03 23:17:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 35 treesize of output 22 [2021-11-03 23:17:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:17:41,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:17:41,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 749 treesize of output 741 [2021-11-03 23:17:41,908 INFO L354 Elim1Store]: treesize reduction 384, result has 32.9 percent of original size [2021-11-03 23:17:41,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 37 case distinctions, treesize of input 15175 treesize of output 14194 [2021-11-03 23:17:42,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:42,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 12316 treesize of output 12316 [2021-11-03 23:17:44,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:44,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-11-03 23:17:45,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:45,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-03 23:17:45,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:45,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-11-03 23:17:45,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:45,509 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-03 23:17:45,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:45,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-03 23:17:47,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-03 23:17:47,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-03 23:17:47,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-03 23:17:47,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-03 23:17:47,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-03 23:17:47,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:47,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 43 [2021-11-03 23:17:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-03 23:17:47,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:47,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-03 23:17:48,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:48,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:48,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-03 23:17:49,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:49,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 23:17:49,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 23:17:49,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 511 treesize of output 545 [2021-11-03 23:18:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:18:29,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254431016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 23:18:29,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 23:18:29,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2021-11-03 23:18:29,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103876343] [2021-11-03 23:18:29,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 23:18:29,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-03 23:18:29,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:18:29,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-03 23:18:29,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-11-03 23:18:29,891 INFO L87 Difference]: Start difference. First operand 278 states and 320 transitions. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:18:31,685 INFO L93 Difference]: Finished difference Result 411 states and 470 transitions. [2021-11-03 23:18:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 23:18:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 23:18:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:18:31,686 INFO L225 Difference]: With dead ends: 411 [2021-11-03 23:18:31,687 INFO L226 Difference]: Without dead ends: 244 [2021-11-03 23:18:31,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1312.36ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-11-03 23:18:31,705 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 542 mSDsluCounter, 1932 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 916.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.10ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1058.85ms IncrementalHoareTripleChecker+Time [2021-11-03 23:18:31,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 0 Invalid, 3010 Unknown, 0 Unchecked, 8.10ms Time], IncrementalHoareTripleChecker [41 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1058.85ms Time] [2021-11-03 23:18:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-03 23:18:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-11-03 23:18:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 174 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 199 transitions. [2021-11-03 23:18:31,717 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 199 transitions. Word has length 71 [2021-11-03 23:18:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:18:31,717 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 199 transitions. [2021-11-03 23:18:31,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 199 transitions. [2021-11-03 23:18:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 23:18:31,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:18:31,718 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:18:31,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-03 23:18:31,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-03 23:18:31,937 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:18:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:18:31,937 INFO L85 PathProgramCache]: Analyzing trace with hash -370008677, now seen corresponding path program 1 times [2021-11-03 23:18:31,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:18:31,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360884650] [2021-11-03 23:18:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:18:31,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:18:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:18:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 23:18:32,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:18:32,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360884650] [2021-11-03 23:18:32,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360884650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:18:32,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334573844] [2021-11-03 23:18:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:18:32,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:18:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:18:32,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:18:32,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-03 23:18:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:18:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-03 23:18:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:18:32,521 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-03 23:18:32,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-03 23:18:32,536 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-03 23:18:32,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-03 23:18:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 23:18:41,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:18:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 23:18:42,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334573844] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 23:18:42,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 23:18:42,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [18, 23] total 50 [2021-11-03 23:18:42,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463971667] [2021-11-03 23:18:42,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:18:42,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 23:18:42,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:18:42,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 23:18:42,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2021-11-03 23:18:42,793 INFO L87 Difference]: Start difference. First operand 175 states and 199 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:18:44,197 INFO L93 Difference]: Finished difference Result 312 states and 358 transitions. [2021-11-03 23:18:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 23:18:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 23:18:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:18:44,199 INFO L225 Difference]: With dead ends: 312 [2021-11-03 23:18:44,199 INFO L226 Difference]: Without dead ends: 220 [2021-11-03 23:18:44,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 8962.14ms TimeCoverageRelationStatistics Valid=606, Invalid=3554, Unknown=0, NotChecked=0, Total=4160 [2021-11-03 23:18:44,200 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2181 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 571.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.43ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 670.15ms IncrementalHoareTripleChecker+Time [2021-11-03 23:18:44,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2181 Valid, 0 Invalid, 1523 Unknown, 0 Unchecked, 4.43ms Time], IncrementalHoareTripleChecker [70 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 670.15ms Time] [2021-11-03 23:18:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-03 23:18:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 175. [2021-11-03 23:18:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.1785714285714286) internal successors, (198), 174 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 198 transitions. [2021-11-03 23:18:44,214 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 198 transitions. Word has length 73 [2021-11-03 23:18:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:18:44,214 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 198 transitions. [2021-11-03 23:18:44,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 198 transitions. [2021-11-03 23:18:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 23:18:44,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:18:44,215 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:18:44,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-03 23:18:44,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:18:44,431 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:18:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:18:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2140195802, now seen corresponding path program 1 times [2021-11-03 23:18:44,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:18:44,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235384537] [2021-11-03 23:18:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:18:44,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:18:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:18:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 23:18:44,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:18:44,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235384537] [2021-11-03 23:18:44,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235384537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 23:18:44,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 23:18:44,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 23:18:44,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747561082] [2021-11-03 23:18:44,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 23:18:44,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 23:18:44,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 23:18:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 23:18:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 23:18:44,482 INFO L87 Difference]: Start difference. First operand 175 states and 198 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 23:18:44,820 INFO L93 Difference]: Finished difference Result 274 states and 310 transitions. [2021-11-03 23:18:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 23:18:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-03 23:18:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 23:18:44,822 INFO L225 Difference]: With dead ends: 274 [2021-11-03 23:18:44,822 INFO L226 Difference]: Without dead ends: 270 [2021-11-03 23:18:44,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.39ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 23:18:44,822 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 246 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 289.43ms IncrementalHoareTripleChecker+Time [2021-11-03 23:18:44,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 0 Invalid, 760 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [8 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 289.43ms Time] [2021-11-03 23:18:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-03 23:18:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 183. [2021-11-03 23:18:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 182 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 206 transitions. [2021-11-03 23:18:44,844 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 206 transitions. Word has length 76 [2021-11-03 23:18:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 23:18:44,844 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 206 transitions. [2021-11-03 23:18:44,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 23:18:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 206 transitions. [2021-11-03 23:18:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 23:18:44,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 23:18:44,845 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 23:18:44,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-03 23:18:44,859 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-03 23:18:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 23:18:44,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1144589933, now seen corresponding path program 1 times [2021-11-03 23:18:44,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 23:18:44,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939522350] [2021-11-03 23:18:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:18:44,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 23:18:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:18:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:18:45,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 23:18:45,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939522350] [2021-11-03 23:18:45,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939522350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 23:18:45,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774653877] [2021-11-03 23:18:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 23:18:45,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 23:18:45,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 23:18:45,414 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 23:18:45,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-03 23:18:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 23:18:45,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-03 23:18:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 23:18:45,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 23:18:45,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 23:18:45,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-03 23:18:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 23:18:45,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-03 23:18:45,773 INFO L354 Elim1Store]: treesize reduction 182, result has 15.0 percent of original size [2021-11-03 23:18:45,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 160 treesize of output 108 [2021-11-03 23:18:45,798 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-03 23:18:45,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 94 [2021-11-03 23:18:48,550 INFO L354 Elim1Store]: treesize reduction 146, result has 2.0 percent of original size [2021-11-03 23:18:48,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 251 treesize of output 134 [2021-11-03 23:18:48,568 INFO L354 Elim1Store]: treesize reduction 89, result has 8.2 percent of original size [2021-11-03 23:18:48,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 46 [2021-11-03 23:18:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 23:18:48,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 23:18:59,587 WARN L210 SmtUtils]: Spent 9.52s on a formula simplification. DAG size of input: 857 DAG size of output: 357 [2021-11-03 23:18:59,589 INFO L354 Elim1Store]: treesize reduction 34853, result has 19.5 percent of original size [2021-11-03 23:18:59,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 1 disjoint index pairs (out of 136 index pairs), introduced 24 new quantified variables, introduced 156 case distinctions, treesize of input 44845241 treesize of output 40197155 [2021-11-03 23:22:15,628 WARN L210 SmtUtils]: Spent 3.27m on a formula simplification. DAG size of input: 2515 DAG size of output: 2447 [2021-11-03 23:22:22,963 WARN L210 SmtUtils]: Spent 7.32s on a formula simplification that was a NOOP. DAG size: 2394 Killed by 15