./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_byte_buf_secure_zero_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 10:26:04,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 10:26:04,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 10:26:04,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 10:26:04,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 10:26:04,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 10:26:04,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 10:26:04,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 10:26:04,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 10:26:04,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 10:26:04,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 10:26:04,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 10:26:04,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 10:26:05,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 10:26:05,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 10:26:05,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 10:26:05,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 10:26:05,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 10:26:05,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 10:26:05,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 10:26:05,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 10:26:05,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 10:26:05,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 10:26:05,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 10:26:05,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 10:26:05,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 10:26:05,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 10:26:05,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 10:26:05,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 10:26:05,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 10:26:05,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 10:26:05,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 10:26:05,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 10:26:05,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 10:26:05,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 10:26:05,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 10:26:05,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 10:26:05,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 10:26:05,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 10:26:05,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 10:26:05,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 10:26:05,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 10:26:05,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 10:26:05,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 10:26:05,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 10:26:05,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 10:26:05,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 10:26:05,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 10:26:05,057 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 10:26:05,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 10:26:05,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 10:26:05,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 10:26:05,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 10:26:05,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 10:26:05,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 10:26:05,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 10:26:05,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 10:26:05,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 10:26:05,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 10:26:05,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 10:26:05,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 10:26:05,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 10:26:05,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 10:26:05,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 10:26:05,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 10:26:05,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 10:26:05,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 10:26:05,060 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 10:26:05,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 10:26:05,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 10:26:05,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 10:26:05,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2021-11-06 10:26:05,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 10:26:05,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 10:26:05,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 10:26:05,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 10:26:05,277 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 10:26:05,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-11-06 10:26:05,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40702014d/ca31ad3c22604508a42bad0997b4e74a/FLAG856dc5137 [2021-11-06 10:26:05,843 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 10:26:05,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-11-06 10:26:05,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40702014d/ca31ad3c22604508a42bad0997b4e74a/FLAG856dc5137 [2021-11-06 10:26:06,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40702014d/ca31ad3c22604508a42bad0997b4e74a [2021-11-06 10:26:06,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 10:26:06,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 10:26:06,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 10:26:06,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 10:26:06,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 10:26:06,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:06" (1/1) ... [2021-11-06 10:26:06,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd5b649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:06, skipping insertion in model container [2021-11-06 10:26:06,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:06" (1/1) ... [2021-11-06 10:26:06,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 10:26:06,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 10:26:06,410 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_byte_buf_secure_zero_harness.i[4498,4511] [2021-11-06 10:26:06,416 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_byte_buf_secure_zero_harness.i[4558,4571] [2021-11-06 10:26:06,431 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 10:26:06,435 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 10:26:07,168 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,168 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,169 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,170 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,170 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,179 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,183 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,185 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,192 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,444 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 10:26:07,445 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 10:26:07,446 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 10:26:07,446 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 10:26:07,447 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 10:26:07,448 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 10:26:07,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 10:26:07,449 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 10:26:07,450 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 10:26:07,451 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 10:26:07,532 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 10:26:07,602 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,602 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 10:26:07,694 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 10:26:07,711 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_byte_buf_secure_zero_harness.i[4498,4511] [2021-11-06 10:26:07,712 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_byte_buf_secure_zero_harness.i[4558,4571] [2021-11-06 10:26:07,714 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 10:26:07,715 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 10:26:07,742 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,742 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,742 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,743 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,743 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,748 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,748 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,750 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,750 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,783 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 10:26:07,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 10:26:07,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 10:26:07,784 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 10:26:07,785 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 10:26:07,786 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 10:26:07,786 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 10:26:07,786 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 10:26:07,786 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 10:26:07,787 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 10:26:07,807 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 10:26:07,846 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,846 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 10:26:07,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 10:26:08,032 INFO L208 MainTranslator]: Completed translation [2021-11-06 10:26:08,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08 WrapperNode [2021-11-06 10:26:08,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 10:26:08,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 10:26:08,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 10:26:08,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 10:26:08,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 10:26:08,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 10:26:08,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 10:26:08,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 10:26:08,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 10:26:08,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 10:26:08,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 10:26:08,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 10:26:08,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (1/1) ... [2021-11-06 10:26:08,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 10:26:08,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:26:08,270 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 10:26:08,287 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 10:26:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 10:26:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 10:26:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 10:26:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 10:26:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 10:26:08,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 10:26:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 10:26:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 10:26:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 10:26:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 10:26:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 10:26:14,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 10:26:14,738 INFO L299 CfgBuilder]: Removed 59 assume(true) statements. [2021-11-06 10:26:14,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:14 BoogieIcfgContainer [2021-11-06 10:26:14,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 10:26:14,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 10:26:14,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 10:26:14,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 10:26:14,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:06" (1/3) ... [2021-11-06 10:26:14,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8b1ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:14, skipping insertion in model container [2021-11-06 10:26:14,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:08" (2/3) ... [2021-11-06 10:26:14,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8b1ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:14, skipping insertion in model container [2021-11-06 10:26:14,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:14" (3/3) ... [2021-11-06 10:26:14,745 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2021-11-06 10:26:14,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 10:26:14,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-06 10:26:14,791 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 10:26:14,800 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 10:26:14,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-06 10:26:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 113 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 112 states have internal predecessors, (156), 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 10:26:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-06 10:26:14,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:14,820 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] [2021-11-06 10:26:14,821 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash -158234594, now seen corresponding path program 1 times [2021-11-06 10:26:14,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:14,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575040486] [2021-11-06 10:26:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:14,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:15,297 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 10:26:15,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:15,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575040486] [2021-11-06 10:26:15,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575040486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:15,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:15,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 10:26:15,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708127387] [2021-11-06 10:26:15,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 10:26:15,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 10:26:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 10:26:15,315 INFO L87 Difference]: Start difference. First operand has 113 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 112 states have internal predecessors, (156), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 10:26:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:15,343 INFO L93 Difference]: Finished difference Result 222 states and 307 transitions. [2021-11-06 10:26:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 10:26:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 29 [2021-11-06 10:26:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:15,351 INFO L225 Difference]: With dead ends: 222 [2021-11-06 10:26:15,351 INFO L226 Difference]: Without dead ends: 108 [2021-11-06 10:26:15,353 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 10:26:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-06 10:26:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-06 10:26:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 107 states have internal predecessors, (140), 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 10:26:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2021-11-06 10:26:15,386 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 29 [2021-11-06 10:26:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:15,387 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2021-11-06 10:26:15,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 10:26:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2021-11-06 10:26:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-06 10:26:15,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:15,392 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] [2021-11-06 10:26:15,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 10:26:15,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -4552034, now seen corresponding path program 1 times [2021-11-06 10:26:15,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:15,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015091406] [2021-11-06 10:26:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:15,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:15,675 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 10:26:15,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:15,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015091406] [2021-11-06 10:26:15,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015091406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:15,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:15,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 10:26:15,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643786522] [2021-11-06 10:26:15,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 10:26:15,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:15,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 10:26:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 10:26:15,677 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 10:26:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:15,788 INFO L93 Difference]: Finished difference Result 190 states and 246 transitions. [2021-11-06 10:26:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 10:26:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2021-11-06 10:26:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:15,790 INFO L225 Difference]: With dead ends: 190 [2021-11-06 10:26:15,790 INFO L226 Difference]: Without dead ends: 108 [2021-11-06 10:26:15,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 10:26:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-06 10:26:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-06 10:26:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.3173076923076923) internal successors, (137), 107 states have internal predecessors, (137), 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 10:26:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2021-11-06 10:26:15,796 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 29 [2021-11-06 10:26:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:15,796 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2021-11-06 10:26:15,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 10:26:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2021-11-06 10:26:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-06 10:26:15,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:15,797 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] [2021-11-06 10:26:15,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 10:26:15,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1058096316, now seen corresponding path program 1 times [2021-11-06 10:26:15,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:15,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163461557] [2021-11-06 10:26:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:15,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:16,050 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 10:26:16,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:16,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163461557] [2021-11-06 10:26:16,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163461557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:16,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:16,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 10:26:16,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435108741] [2021-11-06 10:26:16,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 10:26:16,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 10:26:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 10:26:16,051 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 10:26:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:16,318 INFO L93 Difference]: Finished difference Result 231 states and 298 transitions. [2021-11-06 10:26:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 10:26:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 41 [2021-11-06 10:26:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:16,319 INFO L225 Difference]: With dead ends: 231 [2021-11-06 10:26:16,320 INFO L226 Difference]: Without dead ends: 148 [2021-11-06 10:26:16,320 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 10:26:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-06 10:26:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2021-11-06 10:26:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.2946428571428572) internal successors, (145), 115 states have internal predecessors, (145), 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 10:26:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2021-11-06 10:26:16,325 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 41 [2021-11-06 10:26:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:16,326 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2021-11-06 10:26:16,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 10:26:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2021-11-06 10:26:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-06 10:26:16,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:16,327 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] [2021-11-06 10:26:16,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 10:26:16,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash 996056702, now seen corresponding path program 1 times [2021-11-06 10:26:16,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:16,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626770595] [2021-11-06 10:26:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:16,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:16,662 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 10:26:16,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:16,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626770595] [2021-11-06 10:26:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626770595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:16,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 10:26:16,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420972545] [2021-11-06 10:26:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 10:26:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 10:26:16,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:26:16,664 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 10:26:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:16,966 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2021-11-06 10:26:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 10:26:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 41 [2021-11-06 10:26:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:16,968 INFO L225 Difference]: With dead ends: 156 [2021-11-06 10:26:16,968 INFO L226 Difference]: Without dead ends: 116 [2021-11-06 10:26:16,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:26:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-06 10:26:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-06 10:26:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.2857142857142858) internal successors, (144), 115 states have internal predecessors, (144), 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 10:26:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 144 transitions. [2021-11-06 10:26:16,973 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 144 transitions. Word has length 41 [2021-11-06 10:26:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:16,973 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 144 transitions. [2021-11-06 10:26:16,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 10:26:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 144 transitions. [2021-11-06 10:26:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-06 10:26:16,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:16,974 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] [2021-11-06 10:26:16,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 10:26:16,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:16,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1931250963, now seen corresponding path program 1 times [2021-11-06 10:26:16,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:16,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029897070] [2021-11-06 10:26:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:16,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:17,439 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 10:26:17,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:17,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029897070] [2021-11-06 10:26:17,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029897070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:17,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:17,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 10:26:17,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366517011] [2021-11-06 10:26:17,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 10:26:17,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 10:26:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 10:26:17,440 INFO L87 Difference]: Start difference. First operand 116 states and 144 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 10:26:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:17,868 INFO L93 Difference]: Finished difference Result 184 states and 221 transitions. [2021-11-06 10:26:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 10:26:17,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 47 [2021-11-06 10:26:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:17,869 INFO L225 Difference]: With dead ends: 184 [2021-11-06 10:26:17,869 INFO L226 Difference]: Without dead ends: 180 [2021-11-06 10:26:17,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:26:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-06 10:26:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 124. [2021-11-06 10:26:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.2666666666666666) internal successors, (152), 123 states have internal predecessors, (152), 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 10:26:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 152 transitions. [2021-11-06 10:26:17,876 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 152 transitions. Word has length 47 [2021-11-06 10:26:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:17,877 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 152 transitions. [2021-11-06 10:26:17,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 10:26:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 152 transitions. [2021-11-06 10:26:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-06 10:26:17,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:17,878 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] [2021-11-06 10:26:17,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 10:26:17,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:17,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1524322635, now seen corresponding path program 1 times [2021-11-06 10:26:17,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:17,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867609282] [2021-11-06 10:26:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:17,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:18,293 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 10:26:18,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:18,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867609282] [2021-11-06 10:26:18,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867609282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:18,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:18,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 10:26:18,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167466889] [2021-11-06 10:26:18,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 10:26:18,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 10:26:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 10:26:18,294 INFO L87 Difference]: Start difference. First operand 124 states and 152 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 10:26:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:20,812 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2021-11-06 10:26:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 10:26:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 51 [2021-11-06 10:26:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:20,814 INFO L225 Difference]: With dead ends: 177 [2021-11-06 10:26:20,814 INFO L226 Difference]: Without dead ends: 131 [2021-11-06 10:26:20,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:26:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-06 10:26:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2021-11-06 10:26:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 125 states have internal predecessors, (154), 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 10:26:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 154 transitions. [2021-11-06 10:26:20,818 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 154 transitions. Word has length 51 [2021-11-06 10:26:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:20,818 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 154 transitions. [2021-11-06 10:26:20,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 10:26:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 154 transitions. [2021-11-06 10:26:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-06 10:26:20,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:20,819 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] [2021-11-06 10:26:20,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 10:26:20,819 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2090586291, now seen corresponding path program 1 times [2021-11-06 10:26:20,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:20,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550560732] [2021-11-06 10:26:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:20,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:22,768 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 10:26:22,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:22,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550560732] [2021-11-06 10:26:22,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550560732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:22,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:22,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:26:22,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944296972] [2021-11-06 10:26:22,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:26:22,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:22,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:26:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:26:22,770 INFO L87 Difference]: Start difference. First operand 126 states and 154 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 10:26:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:25,704 INFO L93 Difference]: Finished difference Result 249 states and 305 transitions. [2021-11-06 10:26:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 10:26:25,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 51 [2021-11-06 10:26:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:25,705 INFO L225 Difference]: With dead ends: 249 [2021-11-06 10:26:25,705 INFO L226 Difference]: Without dead ends: 150 [2021-11-06 10:26:25,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-06 10:26:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-06 10:26:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2021-11-06 10:26:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 121 states have internal predecessors, (148), 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 10:26:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2021-11-06 10:26:25,730 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 51 [2021-11-06 10:26:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:25,731 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2021-11-06 10:26:25,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 10:26:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2021-11-06 10:26:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-06 10:26:25,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:25,732 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] [2021-11-06 10:26:25,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 10:26:25,732 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash -122386677, now seen corresponding path program 1 times [2021-11-06 10:26:25,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:25,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358196583] [2021-11-06 10:26:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:25,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:26,386 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 10:26:26,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:26,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358196583] [2021-11-06 10:26:26,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358196583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:26,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:26,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-06 10:26:26,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568556818] [2021-11-06 10:26:26,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 10:26:26,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 10:26:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:26:26,387 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 10:26:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:32,281 INFO L93 Difference]: Finished difference Result 361 states and 446 transitions. [2021-11-06 10:26:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-06 10:26:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 59 [2021-11-06 10:26:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:32,282 INFO L225 Difference]: With dead ends: 361 [2021-11-06 10:26:32,282 INFO L226 Difference]: Without dead ends: 256 [2021-11-06 10:26:32,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-06 10:26:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-06 10:26:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-11-06 10:26:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.2411347517730495) internal successors, (175), 144 states have internal predecessors, (175), 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 10:26:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2021-11-06 10:26:32,289 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 59 [2021-11-06 10:26:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:32,289 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2021-11-06 10:26:32,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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 10:26:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2021-11-06 10:26:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-06 10:26:32,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:32,295 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] [2021-11-06 10:26:32,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 10:26:32,295 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1263816717, now seen corresponding path program 1 times [2021-11-06 10:26:32,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:32,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186658660] [2021-11-06 10:26:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:32,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:32,685 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 10:26:32,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:32,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186658660] [2021-11-06 10:26:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186658660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:32,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:32,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 10:26:32,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228183624] [2021-11-06 10:26:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 10:26:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 10:26:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:26:32,686 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 10:26:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:33,256 INFO L93 Difference]: Finished difference Result 291 states and 342 transitions. [2021-11-06 10:26:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 10:26:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 59 [2021-11-06 10:26:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:33,257 INFO L225 Difference]: With dead ends: 291 [2021-11-06 10:26:33,257 INFO L226 Difference]: Without dead ends: 174 [2021-11-06 10:26:33,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:26:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-06 10:26:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 145. [2021-11-06 10:26:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 144 states have internal predecessors, (172), 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 10:26:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2021-11-06 10:26:33,262 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 59 [2021-11-06 10:26:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:33,262 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2021-11-06 10:26:33,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 10:26:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2021-11-06 10:26:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-06 10:26:33,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:33,263 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] [2021-11-06 10:26:33,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 10:26:33,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash 907824687, now seen corresponding path program 1 times [2021-11-06 10:26:33,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:33,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517680957] [2021-11-06 10:26:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:33,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:33,782 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 10:26:33,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:33,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517680957] [2021-11-06 10:26:33,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517680957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:33,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:33,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 10:26:33,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287169815] [2021-11-06 10:26:33,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 10:26:33,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 10:26:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:26:33,784 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 10:26:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:41,968 INFO L93 Difference]: Finished difference Result 365 states and 429 transitions. [2021-11-06 10:26:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 10:26:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-06 10:26:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:41,971 INFO L225 Difference]: With dead ends: 365 [2021-11-06 10:26:41,971 INFO L226 Difference]: Without dead ends: 229 [2021-11-06 10:26:41,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-11-06 10:26:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-06 10:26:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 138. [2021-11-06 10:26:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.1791044776119404) internal successors, (158), 137 states have internal predecessors, (158), 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 10:26:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2021-11-06 10:26:41,976 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 63 [2021-11-06 10:26:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:41,976 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2021-11-06 10:26:41,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 10:26:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2021-11-06 10:26:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-06 10:26:41,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:41,977 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] [2021-11-06 10:26:41,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 10:26:41,978 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1732937233, now seen corresponding path program 1 times [2021-11-06 10:26:41,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:41,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375010788] [2021-11-06 10:26:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:41,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:42,294 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 10:26:42,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:42,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375010788] [2021-11-06 10:26:42,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375010788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:42,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:42,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 10:26:42,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251902456] [2021-11-06 10:26:42,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 10:26:42,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 10:26:42,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 10:26:42,295 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 10:26:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:47,074 INFO L93 Difference]: Finished difference Result 301 states and 341 transitions. [2021-11-06 10:26:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 10:26:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-06 10:26:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:47,077 INFO L225 Difference]: With dead ends: 301 [2021-11-06 10:26:47,077 INFO L226 Difference]: Without dead ends: 175 [2021-11-06 10:26:47,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:26:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-06 10:26:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 134. [2021-11-06 10:26:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 133 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 10:26:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2021-11-06 10:26:47,081 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 63 [2021-11-06 10:26:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:47,081 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2021-11-06 10:26:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 10:26:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2021-11-06 10:26:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-06 10:26:47,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:47,082 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] [2021-11-06 10:26:47,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 10:26:47,082 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash 354357871, now seen corresponding path program 1 times [2021-11-06 10:26:47,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:47,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892643588] [2021-11-06 10:26:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:47,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:26:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:26:47,717 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 10:26:47,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:26:47,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892643588] [2021-11-06 10:26:47,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892643588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:26:47,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:26:47,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-06 10:26:47,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82580860] [2021-11-06 10:26:47,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 10:26:47,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:26:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 10:26:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-06 10:26:47,718 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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 10:26:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:26:59,887 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2021-11-06 10:26:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 10:26:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-06 10:26:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:26:59,889 INFO L225 Difference]: With dead ends: 353 [2021-11-06 10:26:59,889 INFO L226 Difference]: Without dead ends: 259 [2021-11-06 10:26:59,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-06 10:26:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-06 10:26:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 208. [2021-11-06 10:26:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.1519607843137254) internal successors, (235), 207 states have internal predecessors, (235), 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 10:26:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 235 transitions. [2021-11-06 10:26:59,895 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 235 transitions. Word has length 63 [2021-11-06 10:26:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:26:59,895 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 235 transitions. [2021-11-06 10:26:59,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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 10:26:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 235 transitions. [2021-11-06 10:26:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-06 10:26:59,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:26:59,895 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] [2021-11-06 10:26:59,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 10:26:59,896 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:26:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:26:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 213809261, now seen corresponding path program 1 times [2021-11-06 10:26:59,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:26:59,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730675824] [2021-11-06 10:26:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:26:59,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:27:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:27:01,900 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 10:27:01,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:27:01,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730675824] [2021-11-06 10:27:01,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730675824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:27:01,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:27:01,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 10:27:01,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57801215] [2021-11-06 10:27:01,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 10:27:01,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:27:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 10:27:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:27:01,901 INFO L87 Difference]: Start difference. First operand 208 states and 235 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 10:27:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:27:06,678 INFO L93 Difference]: Finished difference Result 411 states and 467 transitions. [2021-11-06 10:27:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 10:27:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-06 10:27:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:27:06,680 INFO L225 Difference]: With dead ends: 411 [2021-11-06 10:27:06,680 INFO L226 Difference]: Without dead ends: 291 [2021-11-06 10:27:06,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:27:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-06 10:27:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 208. [2021-11-06 10:27:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.142156862745098) internal successors, (233), 207 states have internal predecessors, (233), 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 10:27:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 233 transitions. [2021-11-06 10:27:06,687 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 233 transitions. Word has length 63 [2021-11-06 10:27:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:27:06,687 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 233 transitions. [2021-11-06 10:27:06,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 10:27:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 233 transitions. [2021-11-06 10:27:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-06 10:27:06,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:27:06,688 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] [2021-11-06 10:27:06,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 10:27:06,688 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:27:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:27:06,688 INFO L85 PathProgramCache]: Analyzing trace with hash 694910338, now seen corresponding path program 1 times [2021-11-06 10:27:06,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:27:06,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7183405] [2021-11-06 10:27:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:27:06,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:27:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:27:10,638 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 10:27:10,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:27:10,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7183405] [2021-11-06 10:27:10,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7183405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:27:10,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:27:10,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 10:27:10,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465020923] [2021-11-06 10:27:10,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:27:10,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:27:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:27:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:27:10,639 INFO L87 Difference]: Start difference. First operand 208 states and 233 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 10:27:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:27:13,811 INFO L93 Difference]: Finished difference Result 401 states and 451 transitions. [2021-11-06 10:27:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 10:27:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-06 10:27:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:27:13,813 INFO L225 Difference]: With dead ends: 401 [2021-11-06 10:27:13,813 INFO L226 Difference]: Without dead ends: 273 [2021-11-06 10:27:13,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-06 10:27:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-06 10:27:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 208. [2021-11-06 10:27:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.1323529411764706) internal successors, (231), 207 states have internal predecessors, (231), 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 10:27:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 231 transitions. [2021-11-06 10:27:13,820 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 231 transitions. Word has length 69 [2021-11-06 10:27:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:27:13,821 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 231 transitions. [2021-11-06 10:27:13,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 10:27:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 231 transitions. [2021-11-06 10:27:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-06 10:27:13,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:27:13,822 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] [2021-11-06 10:27:13,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 10:27:13,822 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:27:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:27:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash 448544190, now seen corresponding path program 1 times [2021-11-06 10:27:13,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:27:13,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887782141] [2021-11-06 10:27:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:27:13,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:27:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:27:14,048 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 10:27:14,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:27:14,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887782141] [2021-11-06 10:27:14,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887782141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:27:14,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:27:14,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 10:27:14,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984386717] [2021-11-06 10:27:14,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 10:27:14,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:27:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 10:27:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 10:27:14,050 INFO L87 Difference]: Start difference. First operand 208 states and 231 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 10:27:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:27:14,076 INFO L93 Difference]: Finished difference Result 292 states and 326 transitions. [2021-11-06 10:27:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 10:27:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-06 10:27:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:27:14,077 INFO L225 Difference]: With dead ends: 292 [2021-11-06 10:27:14,077 INFO L226 Difference]: Without dead ends: 164 [2021-11-06 10:27:14,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 10:27:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-06 10:27:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2021-11-06 10:27:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 151 states have internal predecessors, (166), 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 10:27:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2021-11-06 10:27:14,081 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 70 [2021-11-06 10:27:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:27:14,081 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2021-11-06 10:27:14,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 10:27:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2021-11-06 10:27:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-06 10:27:14,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:27:14,082 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] [2021-11-06 10:27:14,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 10:27:14,082 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:27:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:27:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash 484257116, now seen corresponding path program 1 times [2021-11-06 10:27:14,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:27:14,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862045935] [2021-11-06 10:27:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:27:14,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:27:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:27:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:27:17,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:27:17,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862045935] [2021-11-06 10:27:17,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862045935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:27:17,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852301293] [2021-11-06 10:27:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:27:17,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:27:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:27:17,859 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 10:27:17,864 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 10:27:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:27:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 2906 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-06 10:27:18,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 10:27:19,035 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-06 10:27:20,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-06 10:27:20,950 INFO L354 Elim1Store]: treesize reduction 168, result has 18.0 percent of original size [2021-11-06 10:27:20,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 157 [2021-11-06 10:27:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:21,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 23 [2021-11-06 10:27:21,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:21,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 23 [2021-11-06 10:27:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:21,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2021-11-06 10:27:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:21,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2021-11-06 10:27:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:21,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 78 [2021-11-06 10:27:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:21,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 40 [2021-11-06 10:27:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 47 [2021-11-06 10:27:22,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:27:22,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 98 [2021-11-06 10:27:46,602 INFO L354 Elim1Store]: treesize reduction 318, result has 12.9 percent of original size [2021-11-06 10:27:46,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 381 treesize of output 243 [2021-11-06 10:27:50,246 INFO L354 Elim1Store]: treesize reduction 134, result has 43.0 percent of original size [2021-11-06 10:27:50,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 402 treesize of output 303 [2021-11-06 10:27:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:27:50,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852301293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:27:50,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 10:27:50,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-06 10:27:50,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597734462] [2021-11-06 10:27:50,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-06 10:27:50,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:27:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-06 10:27:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-06 10:27:50,746 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 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 10:28:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:28:24,529 INFO L93 Difference]: Finished difference Result 274 states and 301 transitions. [2021-11-06 10:28:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-06 10:28:24,529 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 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 72 [2021-11-06 10:28:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:28:24,530 INFO L225 Difference]: With dead ends: 274 [2021-11-06 10:28:24,530 INFO L226 Difference]: Without dead ends: 208 [2021-11-06 10:28:24,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=533, Invalid=1628, Unknown=1, NotChecked=0, Total=2162 [2021-11-06 10:28:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-06 10:28:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2021-11-06 10:28:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.108433734939759) internal successors, (184), 169 states have internal predecessors, (184), 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 10:28:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2021-11-06 10:28:24,539 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 72 [2021-11-06 10:28:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:28:24,539 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2021-11-06 10:28:24,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 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 10:28:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2021-11-06 10:28:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-06 10:28:24,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:28:24,540 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] [2021-11-06 10:28:24,564 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 10:28:24,755 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,SelfDestructingSolverStorable15 [2021-11-06 10:28:24,756 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:28:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:28:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash -268694696, now seen corresponding path program 1 times [2021-11-06 10:28:24,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:28:24,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015494974] [2021-11-06 10:28:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:24,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:28:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:28:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:28:25,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:28:25,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015494974] [2021-11-06 10:28:25,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015494974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:28:25,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:28:25,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 10:28:25,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219133580] [2021-11-06 10:28:25,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 10:28:25,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:28:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 10:28:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 10:28:25,112 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:28:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:28:27,661 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2021-11-06 10:28:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 10:28:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-06 10:28:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:28:27,662 INFO L225 Difference]: With dead ends: 252 [2021-11-06 10:28:27,662 INFO L226 Difference]: Without dead ends: 186 [2021-11-06 10:28:27,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-06 10:28:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-06 10:28:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 166. [2021-11-06 10:28:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.0925925925925926) internal successors, (177), 165 states have internal predecessors, (177), 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 10:28:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 177 transitions. [2021-11-06 10:28:27,671 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 177 transitions. Word has length 72 [2021-11-06 10:28:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:28:27,671 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 177 transitions. [2021-11-06 10:28:27,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:28:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 177 transitions. [2021-11-06 10:28:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 10:28:27,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:28:27,672 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] [2021-11-06 10:28:27,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 10:28:27,672 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:28:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:28:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash -101538063, now seen corresponding path program 1 times [2021-11-06 10:28:27,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:28:27,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387848004] [2021-11-06 10:28:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:27,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:28:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:28:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:28:28,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:28:28,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387848004] [2021-11-06 10:28:28,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387848004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:28:28,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:28:28,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 10:28:28,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569077580] [2021-11-06 10:28:28,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 10:28:28,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:28:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 10:28:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 10:28:28,100 INFO L87 Difference]: Start difference. First operand 166 states and 177 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 10:28:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:28:28,989 INFO L93 Difference]: Finished difference Result 213 states and 226 transitions. [2021-11-06 10:28:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-06 10:28:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 74 [2021-11-06 10:28:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:28:28,990 INFO L225 Difference]: With dead ends: 213 [2021-11-06 10:28:28,990 INFO L226 Difference]: Without dead ends: 209 [2021-11-06 10:28:28,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-11-06 10:28:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-06 10:28:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 166. [2021-11-06 10:28:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 165 states have internal predecessors, (176), 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 10:28:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2021-11-06 10:28:28,998 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 74 [2021-11-06 10:28:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:28:28,999 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2021-11-06 10:28:28,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 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 10:28:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2021-11-06 10:28:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 10:28:28,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:28:29,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:28:29,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-06 10:28:29,000 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:28:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:28:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash -131806003, now seen corresponding path program 1 times [2021-11-06 10:28:29,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:28:29,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563821494] [2021-11-06 10:28:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:29,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:28:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:28:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:28:29,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:28:29,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563821494] [2021-11-06 10:28:29,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563821494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:28:29,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:28:29,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 10:28:29,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719190352] [2021-11-06 10:28:29,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 10:28:29,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:28:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 10:28:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:28:29,370 INFO L87 Difference]: Start difference. First operand 166 states and 176 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 10:28:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:28:34,170 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2021-11-06 10:28:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 10:28:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 90 [2021-11-06 10:28:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:28:34,172 INFO L225 Difference]: With dead ends: 191 [2021-11-06 10:28:34,172 INFO L226 Difference]: Without dead ends: 171 [2021-11-06 10:28:34,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-06 10:28:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-06 10:28:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2021-11-06 10:28:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 163 states have (on average 1.0736196319018405) internal successors, (175), 165 states have internal predecessors, (175), 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 10:28:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 175 transitions. [2021-11-06 10:28:34,179 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 175 transitions. Word has length 90 [2021-11-06 10:28:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:28:34,180 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 175 transitions. [2021-11-06 10:28:34,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 10:28:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 175 transitions. [2021-11-06 10:28:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 10:28:34,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:28:34,180 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:28:34,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-06 10:28:34,181 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:28:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:28:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1803770330, now seen corresponding path program 1 times [2021-11-06 10:28:34,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:28:34,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600008421] [2021-11-06 10:28:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:34,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:28:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:28:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:28:34,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:28:34,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600008421] [2021-11-06 10:28:34,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600008421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:28:34,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:28:34,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 10:28:34,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15011501] [2021-11-06 10:28:34,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 10:28:34,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:28:34,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 10:28:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 10:28:34,567 INFO L87 Difference]: Start difference. First operand 166 states and 175 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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 10:28:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:28:39,462 INFO L93 Difference]: Finished difference Result 192 states and 201 transitions. [2021-11-06 10:28:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 10:28:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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 92 [2021-11-06 10:28:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:28:39,463 INFO L225 Difference]: With dead ends: 192 [2021-11-06 10:28:39,464 INFO L226 Difference]: Without dead ends: 171 [2021-11-06 10:28:39,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-06 10:28:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-06 10:28:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2021-11-06 10:28:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 162 states have (on average 1.0679012345679013) internal successors, (173), 164 states have internal predecessors, (173), 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 10:28:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 173 transitions. [2021-11-06 10:28:39,471 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 173 transitions. Word has length 92 [2021-11-06 10:28:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:28:39,471 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 173 transitions. [2021-11-06 10:28:39,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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 10:28:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 173 transitions. [2021-11-06 10:28:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 10:28:39,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:28:39,472 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:28:39,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-06 10:28:39,473 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:28:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:28:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1823882895, now seen corresponding path program 1 times [2021-11-06 10:28:39,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:28:39,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429481987] [2021-11-06 10:28:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:39,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:28:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:28:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:28:45,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:28:45,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429481987] [2021-11-06 10:28:45,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429481987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:28:45,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117610337] [2021-11-06 10:28:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:45,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:28:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:28:45,454 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 10:28:45,455 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 10:28:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:28:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-06 10:28:46,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 10:28:47,165 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-06 10:28:48,239 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 10:28:48,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117610337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:28:48,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 10:28:48,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 25 [2021-11-06 10:28:48,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568812504] [2021-11-06 10:28:48,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 10:28:48,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:28:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 10:28:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-06 10:28:48,241 INFO L87 Difference]: Start difference. First operand 165 states and 173 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 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 10:28:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:28:51,722 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2021-11-06 10:28:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 10:28:51,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 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 92 [2021-11-06 10:28:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:28:51,724 INFO L225 Difference]: With dead ends: 182 [2021-11-06 10:28:51,724 INFO L226 Difference]: Without dead ends: 149 [2021-11-06 10:28:51,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-11-06 10:28:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-06 10:28:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 122. [2021-11-06 10:28:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 1.05) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 10:28:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-11-06 10:28:51,729 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 92 [2021-11-06 10:28:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:28:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-11-06 10:28:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 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 10:28:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-11-06 10:28:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-06 10:28:51,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:28:51,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:28:51,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 10:28:51,951 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,SelfDestructingSolverStorable20 [2021-11-06 10:28:51,951 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:28:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:28:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 337913773, now seen corresponding path program 1 times [2021-11-06 10:28:51,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:28:51,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387525477] [2021-11-06 10:28:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:51,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:28:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:28:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 10:28:52,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:28:52,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387525477] [2021-11-06 10:28:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387525477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 10:28:52,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 10:28:52,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 10:28:52,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925994042] [2021-11-06 10:28:52,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 10:28:52,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:28:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 10:28:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 10:28:52,264 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 10:28:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:28:54,720 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-11-06 10:28:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 10:28:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 96 [2021-11-06 10:28:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:28:54,721 INFO L225 Difference]: With dead ends: 122 [2021-11-06 10:28:54,721 INFO L226 Difference]: Without dead ends: 117 [2021-11-06 10:28:54,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 10:28:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-06 10:28:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-06 10:28:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 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 10:28:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-11-06 10:28:54,727 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 96 [2021-11-06 10:28:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:28:54,727 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-11-06 10:28:54,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 10:28:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-11-06 10:28:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-06 10:28:54,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:28:54,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:28:54,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-06 10:28:54,728 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:28:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:28:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2020038766, now seen corresponding path program 1 times [2021-11-06 10:28:54,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:28:54,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402325640] [2021-11-06 10:28:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:28:54,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:29:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:29:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:29:04,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:29:04,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402325640] [2021-11-06 10:29:04,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402325640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:29:04,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849318896] [2021-11-06 10:29:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:29:04,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:29:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:29:04,660 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 10:29:04,661 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 10:32:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:32:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-06 10:32:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 10:32:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:32:18,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-06 10:32:18,646 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-06 10:32:18,670 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-06 10:32:22,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 10:32:22,578 INFO L354 Elim1Store]: treesize reduction 131, result has 12.7 percent of original size [2021-11-06 10:32:22,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 363 treesize of output 280 [2021-11-06 10:32:22,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 10:32:22,674 INFO L354 Elim1Store]: treesize reduction 126, result has 13.1 percent of original size [2021-11-06 10:32:22,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 364 treesize of output 356 [2021-11-06 10:32:22,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 10:32:22,759 INFO L354 Elim1Store]: treesize reduction 113, result has 14.4 percent of original size [2021-11-06 10:32:22,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 353 treesize of output 297 [2021-11-06 10:32:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:32:22,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-06 10:32:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:32:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2021-11-06 10:32:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:32:22,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-11-06 10:32:24,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:32:24,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-06 10:32:24,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:32:24,343 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-06 10:32:24,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 69 [2021-11-06 10:32:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 10:32:24,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 51 [2021-11-06 10:32:27,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2021-11-06 10:32:27,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2021-11-06 10:32:28,940 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-11-06 10:32:28,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 70 [2021-11-06 10:32:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:32:29,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849318896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:32:29,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 10:32:29,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 48 [2021-11-06 10:32:29,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035447439] [2021-11-06 10:32:29,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-06 10:32:29,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 10:32:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-06 10:32:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2021-11-06 10:32:29,172 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 48 states, 48 states have (on average 4.041666666666667) internal successors, (194), 48 states have internal predecessors, (194), 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 10:33:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 10:33:35,407 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-11-06 10:33:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-06 10:33:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.041666666666667) internal successors, (194), 48 states have internal predecessors, (194), 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 98 [2021-11-06 10:33:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 10:33:35,410 INFO L225 Difference]: With dead ends: 238 [2021-11-06 10:33:35,411 INFO L226 Difference]: Without dead ends: 186 [2021-11-06 10:33:35,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1701, Invalid=7611, Unknown=0, NotChecked=0, Total=9312 [2021-11-06 10:33:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-06 10:33:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 119. [2021-11-06 10:33:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 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 10:33:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2021-11-06 10:33:35,419 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 98 [2021-11-06 10:33:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 10:33:35,419 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2021-11-06 10:33:35,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.041666666666667) internal successors, (194), 48 states have internal predecessors, (194), 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 10:33:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2021-11-06 10:33:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-06 10:33:35,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 10:33:35,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 10:33:35,530 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 10:33:35,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:33:35,640 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 10:33:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 10:33:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash 539676428, now seen corresponding path program 2 times [2021-11-06 10:33:35,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 10:33:35,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153370655] [2021-11-06 10:33:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 10:33:35,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 10:33:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 10:33:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 10:33:48,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 10:33:48,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153370655] [2021-11-06 10:33:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153370655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 10:33:48,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671766578] [2021-11-06 10:33:48,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 10:33:48,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 10:33:48,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 10:33:48,167 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 10:33:48,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process Killed by 15