./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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_pop_back_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 bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 11:17:55,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 11:17:55,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 11:17:55,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 11:17:55,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 11:17:55,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 11:17:55,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 11:17:55,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 11:17:55,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 11:17:55,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 11:17:55,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 11:17:55,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 11:17:55,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 11:17:55,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 11:17:55,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 11:17:55,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 11:17:55,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 11:17:55,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 11:17:55,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 11:17:55,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 11:17:55,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 11:17:55,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 11:17:55,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 11:17:55,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 11:17:55,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 11:17:55,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 11:17:55,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 11:17:55,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 11:17:55,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 11:17:55,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 11:17:55,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 11:17:55,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 11:17:55,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 11:17:55,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 11:17:55,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 11:17:55,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 11:17:55,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 11:17:55,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 11:17:55,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 11:17:55,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 11:17:55,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 11:17:55,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 11:17:55,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 11:17:55,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 11:17:56,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 11:17:56,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 11:17:56,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 11:17:56,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 11:17:56,001 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 11:17:56,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 11:17:56,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 11:17:56,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 11:17:56,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 11:17:56,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 11:17:56,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 11:17:56,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 11:17:56,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 11:17:56,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 11:17:56,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 11:17:56,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 11:17:56,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 11:17:56,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:17:56,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 11:17:56,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 11:17:56,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 11:17:56,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 11:17:56,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 11:17:56,005 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 11:17:56,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 11:17:56,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 11:17:56,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 11:17:56,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2021-11-06 11:17:56,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 11:17:56,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 11:17:56,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 11:17:56,226 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 11:17:56,227 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 11:17:56,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-06 11:17:56,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9d7cdc4/34e032b798234fb5a12c3daef81de750/FLAG2fecb4853 [2021-11-06 11:17:56,819 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 11:17:56,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-11-06 11:17:56,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9d7cdc4/34e032b798234fb5a12c3daef81de750/FLAG2fecb4853 [2021-11-06 11:17:57,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9d7cdc4/34e032b798234fb5a12c3daef81de750 [2021-11-06 11:17:57,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 11:17:57,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 11:17:57,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 11:17:57,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 11:17:57,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 11:17:57,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:17:57" (1/1) ... [2021-11-06 11:17:57,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6091ccfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:57, skipping insertion in model container [2021-11-06 11:17:57,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:17:57" (1/1) ... [2021-11-06 11:17:57,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 11:17:57,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 11:17:57,299 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_pop_back_harness.i[4498,4511] [2021-11-06 11:17:57,303 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_pop_back_harness.i[4558,4571] [2021-11-06 11:17:57,315 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 11:17:57,318 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 11:17:57,732 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,734 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,735 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,735 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,738 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,757 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,764 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,766 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,766 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,771 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,772 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,773 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,773 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:57,958 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 11:17:57,959 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 11:17:57,961 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 11:17:57,962 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 11:17:57,962 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 11:17:57,963 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 11:17:57,963 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 11:17:57,964 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 11:17:57,968 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 11:17:57,969 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 11:17:58,039 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 11:17:58,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:17:58,069 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 11:17:58,093 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_pop_back_harness.i[4498,4511] [2021-11-06 11:17:58,093 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_pop_back_harness.i[4558,4571] [2021-11-06 11:17:58,095 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 11:17:58,096 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 11:17:58,127 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,127 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,129 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,129 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,130 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,135 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,139 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,141 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,142 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,142 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,143 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,162 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,163 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:17:58,195 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 11:17:58,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 11:17:58,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 11:17:58,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 11:17:58,201 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 11:17:58,202 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 11:17:58,211 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 11:17:58,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 11:17:58,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 11:17:58,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 11:17:58,240 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 11:17:58,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:17:58,376 INFO L208 MainTranslator]: Completed translation [2021-11-06 11:17:58,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58 WrapperNode [2021-11-06 11:17:58,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 11:17:58,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 11:17:58,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 11:17:58,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 11:17:58,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 11:17:58,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 11:17:58,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 11:17:58,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 11:17:58,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 11:17:58,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 11:17:58,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 11:17:58,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 11:17:58,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (1/1) ... [2021-11-06 11:17:58,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:17:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:17:58,626 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) [2021-11-06 11:17:58,644 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 [2021-11-06 11:17:58,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 11:17:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 11:17:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 11:17:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 11:17:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 11:17:58,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 11:17:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 11:17:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 11:17:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 11:17:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 11:17:59,356 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 11:17:59,356 INFO L299 CfgBuilder]: Removed 119 assume(true) statements. [2021-11-06 11:17:59,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:17:59 BoogieIcfgContainer [2021-11-06 11:17:59,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 11:17:59,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 11:17:59,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 11:17:59,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 11:17:59,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:17:57" (1/3) ... [2021-11-06 11:17:59,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4e9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:17:59, skipping insertion in model container [2021-11-06 11:17:59,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:17:58" (2/3) ... [2021-11-06 11:17:59,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4e9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:17:59, skipping insertion in model container [2021-11-06 11:17:59,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:17:59" (3/3) ... [2021-11-06 11:17:59,364 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2021-11-06 11:17:59,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 11:17:59,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-06 11:17:59,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 11:17:59,414 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 [2021-11-06 11:17:59,416 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-06 11:17:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 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) [2021-11-06 11:17:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-06 11:17:59,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:17:59,444 INFO L513 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, 1, 1, 1, 1] [2021-11-06 11:17:59,444 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:17:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:17:59,448 INFO L85 PathProgramCache]: Analyzing trace with hash 170416363, now seen corresponding path program 1 times [2021-11-06 11:17:59,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:17:59,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2732878] [2021-11-06 11:17:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:17:59,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:17:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:17:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:17:59,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:17:59,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2732878] [2021-11-06 11:17:59,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2732878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:17:59,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:17:59,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 11:17:59,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252653973] [2021-11-06 11:17:59,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 11:17:59,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:17:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 11:17:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 11:17:59,717 INFO L87 Difference]: Start difference. First operand has 217 states, 206 states have (on average 1.5388349514563107) internal successors, (317), 216 states have internal predecessors, (317), 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 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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) [2021-11-06 11:17:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:17:59,748 INFO L93 Difference]: Finished difference Result 430 states and 629 transitions. [2021-11-06 11:17:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 11:17:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-11-06 11:17:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:17:59,760 INFO L225 Difference]: With dead ends: 430 [2021-11-06 11:17:59,760 INFO L226 Difference]: Without dead ends: 212 [2021-11-06 11:17:59,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 11:17:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-06 11:17:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-11-06 11:17:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 202 states have (on average 1.391089108910891) internal successors, (281), 211 states have internal predecessors, (281), 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) [2021-11-06 11:17:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 281 transitions. [2021-11-06 11:17:59,803 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 281 transitions. Word has length 56 [2021-11-06 11:17:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:17:59,804 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 281 transitions. [2021-11-06 11:17:59,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 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) [2021-11-06 11:17:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 281 transitions. [2021-11-06 11:17:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-06 11:17:59,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:17:59,805 INFO L513 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, 1, 1, 1, 1] [2021-11-06 11:17:59,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 11:17:59,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:17:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:17:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash 828944299, now seen corresponding path program 1 times [2021-11-06 11:17:59,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:17:59,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287609895] [2021-11-06 11:17:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:17:59,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:17:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:17:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:17:59,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:17:59,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287609895] [2021-11-06 11:17:59,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287609895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:17:59,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:17:59,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:17:59,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699124809] [2021-11-06 11:17:59,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:17:59,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:17:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:17:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:17:59,903 INFO L87 Difference]: Start difference. First operand 212 states and 281 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:00,039 INFO L93 Difference]: Finished difference Result 462 states and 632 transitions. [2021-11-06 11:18:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:18:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-06 11:18:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:00,043 INFO L225 Difference]: With dead ends: 462 [2021-11-06 11:18:00,044 INFO L226 Difference]: Without dead ends: 272 [2021-11-06 11:18:00,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:18:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-06 11:18:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2021-11-06 11:18:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 212 states have (on average 1.3726415094339623) internal successors, (291), 221 states have internal predecessors, (291), 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) [2021-11-06 11:18:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 291 transitions. [2021-11-06 11:18:00,076 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 291 transitions. Word has length 56 [2021-11-06 11:18:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:00,077 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 291 transitions. [2021-11-06 11:18:00,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 291 transitions. [2021-11-06 11:18:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-06 11:18:00,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:00,081 INFO L513 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, 1, 1, 1, 1] [2021-11-06 11:18:00,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 11:18:00,081 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash 434577513, now seen corresponding path program 1 times [2021-11-06 11:18:00,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:00,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147963622] [2021-11-06 11:18:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:00,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:00,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:00,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147963622] [2021-11-06 11:18:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147963622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:00,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:00,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:18:00,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663957927] [2021-11-06 11:18:00,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:18:00,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:18:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:18:00,161 INFO L87 Difference]: Start difference. First operand 222 states and 291 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:00,257 INFO L93 Difference]: Finished difference Result 458 states and 617 transitions. [2021-11-06 11:18:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:18:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-06 11:18:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:00,258 INFO L225 Difference]: With dead ends: 458 [2021-11-06 11:18:00,259 INFO L226 Difference]: Without dead ends: 262 [2021-11-06 11:18:00,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:18:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-06 11:18:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 232. [2021-11-06 11:18:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 222 states have (on average 1.3558558558558558) internal successors, (301), 231 states have internal predecessors, (301), 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) [2021-11-06 11:18:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 301 transitions. [2021-11-06 11:18:00,268 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 301 transitions. Word has length 56 [2021-11-06 11:18:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:00,268 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 301 transitions. [2021-11-06 11:18:00,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 301 transitions. [2021-11-06 11:18:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-06 11:18:00,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:00,270 INFO L513 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, 1, 1, 1, 1] [2021-11-06 11:18:00,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 11:18:00,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1809405785, now seen corresponding path program 1 times [2021-11-06 11:18:00,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:00,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041310487] [2021-11-06 11:18:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:00,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:00,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:00,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041310487] [2021-11-06 11:18:00,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041310487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:00,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:00,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:18:00,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443216555] [2021-11-06 11:18:00,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:18:00,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:18:00,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:18:00,321 INFO L87 Difference]: Start difference. First operand 232 states and 301 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:00,392 INFO L93 Difference]: Finished difference Result 454 states and 602 transitions. [2021-11-06 11:18:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:18:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-06 11:18:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:00,394 INFO L225 Difference]: With dead ends: 454 [2021-11-06 11:18:00,394 INFO L226 Difference]: Without dead ends: 252 [2021-11-06 11:18:00,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:18:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-06 11:18:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2021-11-06 11:18:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 237 states have (on average 1.3333333333333333) internal successors, (316), 246 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) [2021-11-06 11:18:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 316 transitions. [2021-11-06 11:18:00,401 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 316 transitions. Word has length 56 [2021-11-06 11:18:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:00,401 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 316 transitions. [2021-11-06 11:18:00,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 316 transitions. [2021-11-06 11:18:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-06 11:18:00,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:00,402 INFO L513 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, 1, 1, 1, 1] [2021-11-06 11:18:00,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 11:18:00,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:00,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1534646171, now seen corresponding path program 1 times [2021-11-06 11:18:00,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:00,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797836029] [2021-11-06 11:18:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:00,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:00,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:00,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797836029] [2021-11-06 11:18:00,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797836029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:00,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:00,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:18:00,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370879820] [2021-11-06 11:18:00,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:18:00,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:18:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:18:00,480 INFO L87 Difference]: Start difference. First operand 247 states and 316 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:00,527 INFO L93 Difference]: Finished difference Result 448 states and 574 transitions. [2021-11-06 11:18:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:18:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 56 [2021-11-06 11:18:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:00,529 INFO L225 Difference]: With dead ends: 448 [2021-11-06 11:18:00,529 INFO L226 Difference]: Without dead ends: 239 [2021-11-06 11:18:00,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:18:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-06 11:18:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-06 11:18:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 229 states have (on average 1.3275109170305677) internal successors, (304), 238 states have internal predecessors, (304), 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) [2021-11-06 11:18:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-11-06 11:18:00,535 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 56 [2021-11-06 11:18:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:00,536 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-11-06 11:18:00,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-11-06 11:18:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-06 11:18:00,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:00,537 INFO L513 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, 1, 1, 1, 1] [2021-11-06 11:18:00,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 11:18:00,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1858303597, now seen corresponding path program 1 times [2021-11-06 11:18:00,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:00,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587686482] [2021-11-06 11:18:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:00,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:00,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:00,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587686482] [2021-11-06 11:18:00,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587686482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:00,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:00,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:18:00,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464868542] [2021-11-06 11:18:00,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:18:00,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:18:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:18:00,615 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:00,665 INFO L93 Difference]: Finished difference Result 524 states and 656 transitions. [2021-11-06 11:18:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:18:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-06 11:18:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:00,667 INFO L225 Difference]: With dead ends: 524 [2021-11-06 11:18:00,667 INFO L226 Difference]: Without dead ends: 316 [2021-11-06 11:18:00,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:18:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-06 11:18:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 229. [2021-11-06 11:18:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 219 states have (on average 1.3059360730593608) internal successors, (286), 228 states have internal predecessors, (286), 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) [2021-11-06 11:18:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 286 transitions. [2021-11-06 11:18:00,673 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 286 transitions. Word has length 56 [2021-11-06 11:18:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:00,674 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 286 transitions. [2021-11-06 11:18:00,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-06 11:18:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 286 transitions. [2021-11-06 11:18:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-06 11:18:00,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:00,675 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:00,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 11:18:00,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1990287981, now seen corresponding path program 1 times [2021-11-06 11:18:00,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:00,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744011292] [2021-11-06 11:18:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:00,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:00,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:00,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744011292] [2021-11-06 11:18:00,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744011292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:00,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:00,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:18:00,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732823179] [2021-11-06 11:18:00,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:18:00,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:18:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:18:00,735 INFO L87 Difference]: Start difference. First operand 229 states and 286 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2021-11-06 11:18:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:00,834 INFO L93 Difference]: Finished difference Result 534 states and 662 transitions. [2021-11-06 11:18:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 11:18:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 [2021-11-06 11:18:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:00,835 INFO L225 Difference]: With dead ends: 534 [2021-11-06 11:18:00,835 INFO L226 Difference]: Without dead ends: 342 [2021-11-06 11:18:00,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-06 11:18:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-06 11:18:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 229. [2021-11-06 11:18:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 219 states have (on average 1.2876712328767124) internal successors, (282), 228 states have internal predecessors, (282), 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) [2021-11-06 11:18:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-11-06 11:18:00,841 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 60 [2021-11-06 11:18:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:00,842 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-11-06 11:18:00,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2021-11-06 11:18:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-11-06 11:18:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 11:18:00,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:00,843 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:00,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 11:18:00,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 49668941, now seen corresponding path program 1 times [2021-11-06 11:18:00,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:00,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089486979] [2021-11-06 11:18:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:00,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:00,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089486979] [2021-11-06 11:18:00,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089486979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:00,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:00,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:18:00,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97056326] [2021-11-06 11:18:00,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:18:00,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:18:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:18:00,960 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-11-06 11:18:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:01,138 INFO L93 Difference]: Finished difference Result 723 states and 890 transitions. [2021-11-06 11:18:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:18:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 64 [2021-11-06 11:18:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:01,141 INFO L225 Difference]: With dead ends: 723 [2021-11-06 11:18:01,141 INFO L226 Difference]: Without dead ends: 530 [2021-11-06 11:18:01,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:18:01,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-06 11:18:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 233. [2021-11-06 11:18:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 223 states have (on average 1.2825112107623318) internal successors, (286), 232 states have internal predecessors, (286), 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) [2021-11-06 11:18:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 286 transitions. [2021-11-06 11:18:01,150 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 286 transitions. Word has length 64 [2021-11-06 11:18:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:01,151 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 286 transitions. [2021-11-06 11:18:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-11-06 11:18:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 286 transitions. [2021-11-06 11:18:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 11:18:01,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:01,153 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:01,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 11:18:01,153 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1788737394, now seen corresponding path program 1 times [2021-11-06 11:18:01,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:01,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995211910] [2021-11-06 11:18:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:01,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:01,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:01,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995211910] [2021-11-06 11:18:01,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995211910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:01,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:01,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:18:01,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132151788] [2021-11-06 11:18:01,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:18:01,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:18:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:18:01,254 INFO L87 Difference]: Start difference. First operand 233 states and 286 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2021-11-06 11:18:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:01,424 INFO L93 Difference]: Finished difference Result 726 states and 889 transitions. [2021-11-06 11:18:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:18:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 66 [2021-11-06 11:18:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:01,426 INFO L225 Difference]: With dead ends: 726 [2021-11-06 11:18:01,426 INFO L226 Difference]: Without dead ends: 530 [2021-11-06 11:18:01,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:18:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-06 11:18:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 237. [2021-11-06 11:18:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 227 states have (on average 1.277533039647577) internal successors, (290), 236 states have internal predecessors, (290), 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) [2021-11-06 11:18:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 290 transitions. [2021-11-06 11:18:01,435 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 290 transitions. Word has length 66 [2021-11-06 11:18:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:01,435 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 290 transitions. [2021-11-06 11:18:01,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2021-11-06 11:18:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 290 transitions. [2021-11-06 11:18:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-06 11:18:01,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:01,436 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:01,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 11:18:01,437 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1529718097, now seen corresponding path program 1 times [2021-11-06 11:18:01,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:01,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145989128] [2021-11-06 11:18:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:01,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:01,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:01,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145989128] [2021-11-06 11:18:01,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145989128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:01,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:01,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:18:01,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727232556] [2021-11-06 11:18:01,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:18:01,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:18:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:18:01,510 INFO L87 Difference]: Start difference. First operand 237 states and 290 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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) [2021-11-06 11:18:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:01,734 INFO L93 Difference]: Finished difference Result 733 states and 897 transitions. [2021-11-06 11:18:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 11:18:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 [2021-11-06 11:18:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:01,736 INFO L225 Difference]: With dead ends: 733 [2021-11-06 11:18:01,736 INFO L226 Difference]: Without dead ends: 526 [2021-11-06 11:18:01,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:18:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-06 11:18:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 241. [2021-11-06 11:18:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 231 states have (on average 1.2727272727272727) internal successors, (294), 240 states have internal predecessors, (294), 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) [2021-11-06 11:18:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 294 transitions. [2021-11-06 11:18:01,746 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 294 transitions. Word has length 76 [2021-11-06 11:18:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:01,746 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 294 transitions. [2021-11-06 11:18:01,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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) [2021-11-06 11:18:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 294 transitions. [2021-11-06 11:18:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-06 11:18:01,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:01,747 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:01,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 11:18:01,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1176629715, now seen corresponding path program 1 times [2021-11-06 11:18:01,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:01,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338515479] [2021-11-06 11:18:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:01,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:18:01,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:01,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338515479] [2021-11-06 11:18:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338515479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:01,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:01,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:18:01,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803203255] [2021-11-06 11:18:01,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:18:01,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:18:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:18:01,873 INFO L87 Difference]: Start difference. First operand 241 states and 294 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2021-11-06 11:18:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:01,991 INFO L93 Difference]: Finished difference Result 648 states and 782 transitions. [2021-11-06 11:18:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:18:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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 [2021-11-06 11:18:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:01,993 INFO L225 Difference]: With dead ends: 648 [2021-11-06 11:18:01,993 INFO L226 Difference]: Without dead ends: 444 [2021-11-06 11:18:01,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:18:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-06 11:18:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 241. [2021-11-06 11:18:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 231 states have (on average 1.2640692640692641) internal successors, (292), 240 states have internal predecessors, (292), 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) [2021-11-06 11:18:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 292 transitions. [2021-11-06 11:18:02,001 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 292 transitions. Word has length 76 [2021-11-06 11:18:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:02,001 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 292 transitions. [2021-11-06 11:18:02,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2021-11-06 11:18:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 292 transitions. [2021-11-06 11:18:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-06 11:18:02,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:02,002 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:02,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 11:18:02,002 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:02,003 INFO L85 PathProgramCache]: Analyzing trace with hash 660004237, now seen corresponding path program 1 times [2021-11-06 11:18:02,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:02,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456001539] [2021-11-06 11:18:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:02,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 11:18:02,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:02,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456001539] [2021-11-06 11:18:02,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456001539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:18:02,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603325686] [2021-11-06 11:18:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:02,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:18:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:18:02,117 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) [2021-11-06 11:18:02,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 11:18:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:02,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-06 11:18:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:18:02,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:18:02,481 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 [2021-11-06 11:18:03,203 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 [2021-11-06 11:18:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 11:18:03,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603325686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:18:03,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:18:03,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-11-06 11:18:03,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375945020] [2021-11-06 11:18:03,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 11:18:03,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 11:18:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-06 11:18:03,260 INFO L87 Difference]: Start difference. First operand 241 states and 292 transitions. Second operand has 17 states, 17 states have (on average 8.176470588235293) internal successors, (139), 17 states have internal predecessors, (139), 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) [2021-11-06 11:18:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:05,856 INFO L93 Difference]: Finished difference Result 1781 states and 2097 transitions. [2021-11-06 11:18:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-06 11:18:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.176470588235293) internal successors, (139), 17 states have internal predecessors, (139), 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 80 [2021-11-06 11:18:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:05,861 INFO L225 Difference]: With dead ends: 1781 [2021-11-06 11:18:05,862 INFO L226 Difference]: Without dead ends: 1579 [2021-11-06 11:18:05,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=3981, Unknown=0, NotChecked=0, Total=5256 [2021-11-06 11:18:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-06 11:18:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 365. [2021-11-06 11:18:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 355 states have (on average 1.2450704225352112) internal successors, (442), 364 states have internal predecessors, (442), 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) [2021-11-06 11:18:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 442 transitions. [2021-11-06 11:18:05,888 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 442 transitions. Word has length 80 [2021-11-06 11:18:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:05,888 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 442 transitions. [2021-11-06 11:18:05,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.176470588235293) internal successors, (139), 17 states have internal predecessors, (139), 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) [2021-11-06 11:18:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 442 transitions. [2021-11-06 11:18:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 11:18:05,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:05,890 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:05,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 11:18:06,103 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,SelfDestructingSolverStorable11 [2021-11-06 11:18:06,104 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2023690006, now seen corresponding path program 1 times [2021-11-06 11:18:06,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:06,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499798303] [2021-11-06 11:18:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:06,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:18:06,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:06,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499798303] [2021-11-06 11:18:06,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499798303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:18:06,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615453949] [2021-11-06 11:18:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:06,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:18:06,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:18:06,503 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) [2021-11-06 11:18:06,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 11:18:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-06 11:18:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:18:06,777 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-06 11:18:06,777 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 [2021-11-06 11:18:06,793 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-06 11:18:06,793 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 [2021-11-06 11:18:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:18:12,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615453949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:12,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:18:12,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2021-11-06 11:18:12,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597617718] [2021-11-06 11:18:12,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 11:18:12,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 11:18:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-11-06 11:18:12,360 INFO L87 Difference]: Start difference. First operand 365 states and 442 transitions. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 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) [2021-11-06 11:18:19,714 WARN L207 SmtUtils]: Spent 5.08 s on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-11-06 11:18:25,010 WARN L207 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2021-11-06 11:18:30,743 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 100 [2021-11-06 11:18:37,992 WARN L207 SmtUtils]: Spent 7.21 s on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2021-11-06 11:18:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:40,346 INFO L93 Difference]: Finished difference Result 518 states and 630 transitions. [2021-11-06 11:18:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 11:18:40,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 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 82 [2021-11-06 11:18:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:40,348 INFO L225 Difference]: With dead ends: 518 [2021-11-06 11:18:40,348 INFO L226 Difference]: Without dead ends: 365 [2021-11-06 11:18:40,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-11-06 11:18:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-06 11:18:40,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-11-06 11:18:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 355 states have (on average 1.2394366197183098) internal successors, (440), 364 states have internal predecessors, (440), 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) [2021-11-06 11:18:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 440 transitions. [2021-11-06 11:18:40,366 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 440 transitions. Word has length 82 [2021-11-06 11:18:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:40,366 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 440 transitions. [2021-11-06 11:18:40,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 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) [2021-11-06 11:18:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 440 transitions. [2021-11-06 11:18:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 11:18:40,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:40,368 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:40,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 11:18:40,596 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,SelfDestructingSolverStorable12 [2021-11-06 11:18:40,596 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2021842964, now seen corresponding path program 1 times [2021-11-06 11:18:40,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:40,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140137949] [2021-11-06 11:18:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:40,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:18:40,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:40,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140137949] [2021-11-06 11:18:40,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140137949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:40,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:18:40,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-06 11:18:40,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767916995] [2021-11-06 11:18:40,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 11:18:40,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 11:18:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:18:40,917 INFO L87 Difference]: Start difference. First operand 365 states and 440 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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) [2021-11-06 11:18:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:18:41,682 INFO L93 Difference]: Finished difference Result 734 states and 895 transitions. [2021-11-06 11:18:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 11:18:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 82 [2021-11-06 11:18:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:18:41,684 INFO L225 Difference]: With dead ends: 734 [2021-11-06 11:18:41,684 INFO L226 Difference]: Without dead ends: 580 [2021-11-06 11:18:41,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-11-06 11:18:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-06 11:18:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 365. [2021-11-06 11:18:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 355 states have (on average 1.236619718309859) internal successors, (439), 364 states have internal predecessors, (439), 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) [2021-11-06 11:18:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 439 transitions. [2021-11-06 11:18:41,703 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 439 transitions. Word has length 82 [2021-11-06 11:18:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:18:41,703 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 439 transitions. [2021-11-06 11:18:41,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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) [2021-11-06 11:18:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 439 transitions. [2021-11-06 11:18:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 11:18:41,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:18:41,704 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:18:41,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 11:18:41,705 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:18:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:18:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash -246835602, now seen corresponding path program 1 times [2021-11-06 11:18:41,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:18:41,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143478833] [2021-11-06 11:18:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:41,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:18:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:18:41,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:18:41,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143478833] [2021-11-06 11:18:41,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143478833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:18:41,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116333604] [2021-11-06 11:18:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:18:41,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:18:41,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:18:41,948 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) [2021-11-06 11:18:41,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 11:18:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:18:42,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-06 11:18:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:18:42,373 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-06 11:18:42,374 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 [2021-11-06 11:18:42,383 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-06 11:18:42,383 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 [2021-11-06 11:18:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:18:46,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116333604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:18:46,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:18:46,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13] total 25 [2021-11-06 11:18:46,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722292977] [2021-11-06 11:18:46,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 11:18:46,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:18:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 11:18:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-11-06 11:18:46,121 INFO L87 Difference]: Start difference. First operand 365 states and 439 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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) [2021-11-06 11:18:57,962 WARN L207 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-11-06 11:19:06,097 WARN L207 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 111 DAG size of output: 82 [2021-11-06 11:19:12,036 WARN L207 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-11-06 11:19:20,953 WARN L207 SmtUtils]: Spent 8.83 s on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2021-11-06 11:19:31,289 WARN L207 SmtUtils]: Spent 10.29 s on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2021-11-06 11:19:38,255 WARN L207 SmtUtils]: Spent 6.93 s on a formula simplification. DAG size of input: 115 DAG size of output: 104 [2021-11-06 11:19:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:19:42,620 INFO L93 Difference]: Finished difference Result 522 states and 631 transitions. [2021-11-06 11:19:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 11:19:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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 82 [2021-11-06 11:19:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:19:42,622 INFO L225 Difference]: With dead ends: 522 [2021-11-06 11:19:42,622 INFO L226 Difference]: Without dead ends: 366 [2021-11-06 11:19:42,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-11-06 11:19:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-06 11:19:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2021-11-06 11:19:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 355 states have (on average 1.2309859154929577) internal successors, (437), 364 states have internal predecessors, (437), 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) [2021-11-06 11:19:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2021-11-06 11:19:42,659 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 82 [2021-11-06 11:19:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:19:42,659 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2021-11-06 11:19:42,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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) [2021-11-06 11:19:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2021-11-06 11:19:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 11:19:42,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:19:42,661 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:19:42,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-06 11:19:42,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:19:42,876 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 11:19:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:19:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash 433222768, now seen corresponding path program 1 times [2021-11-06 11:19:42,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:19:42,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313746237] [2021-11-06 11:19:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:19:42,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:19:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:19:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:19:43,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:19:43,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313746237] [2021-11-06 11:19:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313746237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:19:43,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552610163] [2021-11-06 11:19:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:19:43,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:19:43,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:19:43,058 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) [2021-11-06 11:19:43,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 11:19:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:19:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-06 11:19:43,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:19:43,620 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-06 11:19:43,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-06 11:19:57,681 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-06 11:20:15,660 WARN L207 SmtUtils]: Spent 9.91 s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-06 11:20:27,773 WARN L207 SmtUtils]: Spent 10.04 s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-06 11:20:39,196 WARN L207 SmtUtils]: Spent 9.28 s on a formula simplification that was a NOOP. DAG size: 25 [2021-11-06 11:20:49,268 WARN L207 SmtUtils]: Spent 10.03 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-06 11:20:59,436 WARN L207 SmtUtils]: Spent 10.02 s on a formula simplification that was a NOOP. DAG size: 26 [2021-11-06 11:21:07,506 WARN L207 SmtUtils]: Spent 8.01 s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-06 11:21:15,638 WARN L207 SmtUtils]: Spent 8.03 s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-06 11:21:22,022 WARN L207 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-06 11:21:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:21:22,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552610163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:21:22,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:21:22,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-11-06 11:21:22,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480322700] [2021-11-06 11:21:22,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-06 11:21:22,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:21:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-06 11:21:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=476, Unknown=8, NotChecked=0, Total=552 [2021-11-06 11:21:22,052 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 24 states, 24 states have (on average 6.291666666666667) internal successors, (151), 24 states have internal predecessors, (151), 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) [2021-11-06 11:21:44,194 WARN L207 SmtUtils]: Spent 10.03 s on a formula simplification that was a NOOP. DAG size: 23 [2021-11-06 11:22:05,428 WARN L207 SmtUtils]: Spent 19.19 s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-06 11:22:23,581 WARN L207 SmtUtils]: Spent 18.13 s on a formula simplification that was a NOOP. DAG size: 38 [2021-11-06 11:22:42,963 WARN L207 SmtUtils]: Spent 19.29 s on a formula simplification that was a NOOP. DAG size: 42 [2021-11-06 11:23:20,995 WARN L207 SmtUtils]: Spent 38.01 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-11-06 11:23:41,379 WARN L207 SmtUtils]: Spent 20.32 s on a formula simplification that was a NOOP. DAG size: 45 [2021-11-06 11:24:17,351 WARN L207 SmtUtils]: Spent 35.95 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-11-06 11:25:09,036 WARN L207 SmtUtils]: Spent 51.64 s on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-11-06 11:26:00,320 WARN L207 SmtUtils]: Spent 51.27 s on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-11-06 11:26:55,119 WARN L207 SmtUtils]: Spent 54.76 s on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-11-06 11:27:48,928 WARN L207 SmtUtils]: Spent 53.75 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-11-06 11:28:39,786 WARN L207 SmtUtils]: Spent 50.83 s on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-11-06 11:29:17,518 WARN L207 SmtUtils]: Spent 37.49 s on a formula simplification that was a NOOP. DAG size: 70 [2021-11-06 11:29:52,880 WARN L207 SmtUtils]: Spent 35.34 s on a formula simplification that was a NOOP. DAG size: 71 [2021-11-06 11:30:29,006 WARN L207 SmtUtils]: Spent 36.11 s on a formula simplification that was a NOOP. DAG size: 72 [2021-11-06 11:31:02,541 WARN L207 SmtUtils]: Spent 33.44 s on a formula simplification that was a NOOP. DAG size: 67 [2021-11-06 11:31:22,619 WARN L207 SmtUtils]: Spent 20.06 s on a formula simplification that was a NOOP. DAG size: 44 [2021-11-06 11:32:02,246 WARN L207 SmtUtils]: Spent 39.60 s on a formula simplification that was a NOOP. DAG size: 63 Killed by 15