./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_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 de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:31:44,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:31:44,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:31:44,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:31:44,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:31:44,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:31:44,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:31:44,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:31:44,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:31:44,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:31:44,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:31:44,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:31:44,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:31:44,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:31:44,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:31:44,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:31:44,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:31:44,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:31:44,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:31:44,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:31:44,615 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:31:44,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:31:44,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:31:44,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:31:44,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:31:44,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:31:44,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:31:44,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:31:44,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:31:44,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:31:44,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:31:44,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:31:44,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:31:44,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:31:44,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:31:44,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:31:44,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:31:44,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:31:44,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:31:44,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:31:44,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:31:44,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:31:44,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 09:31:44,641 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:31:44,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:31:44,642 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:31:44,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:31:44,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:31:44,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:31:44,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:31:44,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:31:44,643 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:31:44,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:31:44,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:31:44,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:31:44,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:31:44,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:31:44,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:31:44,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:31:44,644 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:31:44,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:31:44,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:31:44,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:31:44,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:31:44,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:31:44,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:31:44,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:31:44,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:31:44,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:31:44,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:31:44,645 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:31:44,646 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:31:44,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:31:44,646 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3da06dbfc8734cb93dce42b312357899e8d9cc914b94ba94740650fa2d8258 [2022-07-21 09:31:44,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:31:44,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:31:44,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:31:44,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:31:44,909 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:31:44,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-07-21 09:31:44,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f978919/48e1d24798104739900de15437097a65/FLAG22e86b422 [2022-07-21 09:31:45,539 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:31:45,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i [2022-07-21 09:31:45,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f978919/48e1d24798104739900de15437097a65/FLAG22e86b422 [2022-07-21 09:31:45,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53f978919/48e1d24798104739900de15437097a65 [2022-07-21 09:31:45,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:31:45,989 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:31:45,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:31:45,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:31:45,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:31:45,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:31:45" (1/1) ... [2022-07-21 09:31:45,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db85b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:45, skipping insertion in model container [2022-07-21 09:31:45,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:31:45" (1/1) ... [2022-07-21 09:31:46,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:31:46,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:31:46,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-07-21 09:31:46,258 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-07-21 09:31:46,928 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,930 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,931 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,931 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,933 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,953 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,954 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,955 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:46,956 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,184 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:31:47,185 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:31:47,186 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:31:47,186 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:31:47,187 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:31:47,188 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:31:47,188 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:31:47,188 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:31:47,189 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:31:47,189 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:31:47,265 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:31:47,277 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,277 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,316 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,320 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:31:47,435 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:31:47,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4494,4507] [2022-07-21 09:31:47,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_harness.i[4554,4567] [2022-07-21 09:31:47,461 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,461 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,462 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,462 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,462 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,466 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,466 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,467 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,467 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,485 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-21 09:31:47,486 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-21 09:31:47,486 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-21 09:31:47,487 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-21 09:31:47,487 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-21 09:31:47,488 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-21 09:31:47,488 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-21 09:31:47,488 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-21 09:31:47,489 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-21 09:31:47,489 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-21 09:31:47,518 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-21 09:31:47,535 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,535 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,588 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,588 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-21 09:31:47,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:31:47,826 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:31:47,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47 WrapperNode [2022-07-21 09:31:47,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:31:47,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:31:47,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:31:47,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:31:47,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:47,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:47,986 INFO L137 Inliner]: procedures = 692, calls = 2621, calls flagged for inlining = 60, calls inlined = 10, statements flattened = 957 [2022-07-21 09:31:47,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:31:47,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:31:47,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:31:47,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:31:47,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:47,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:47,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:48,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:48,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:48,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:48,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:48,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:31:48,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:31:48,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:31:48,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:31:48,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (1/1) ... [2022-07-21 09:31:48,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:31:48,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:48,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:31:48,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:31:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-07-21 09:31:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-07-21 09:31:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:31:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-07-21 09:31:48,152 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-07-21 09:31:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:31:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-21 09:31:48,153 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-21 09:31:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 09:31:48,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 09:31:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:31:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:31:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 09:31:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:31:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:31:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-21 09:31:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-21 09:31:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-07-21 09:31:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-07-21 09:31:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_reserve [2022-07-21 09:31:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_reserve [2022-07-21 09:31:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-07-21 09:31:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-07-21 09:31:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 09:31:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 09:31:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:31:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 09:31:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 09:31:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-07-21 09:31:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-07-21 09:31:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-21 09:31:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-21 09:31:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:31:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:31:48,443 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:31:48,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:31:49,137 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:31:49,144 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:31:49,144 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 09:31:49,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:31:49 BoogieIcfgContainer [2022-07-21 09:31:49,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:31:49,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:31:49,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:31:49,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:31:49,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:31:45" (1/3) ... [2022-07-21 09:31:49,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426ddb3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:31:49, skipping insertion in model container [2022-07-21 09:31:49,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:31:47" (2/3) ... [2022-07-21 09:31:49,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426ddb3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:31:49, skipping insertion in model container [2022-07-21 09:31:49,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:31:49" (3/3) ... [2022-07-21 09:31:49,151 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_harness.i [2022-07-21 09:31:49,162 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:31:49,162 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:31:49,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:31:49,228 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13562, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76cd73fc [2022-07-21 09:31:49,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 09:31:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 104 states have internal predecessors, (134), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-21 09:31:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 09:31:49,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:49,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:49,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash 122195533, now seen corresponding path program 1 times [2022-07-21 09:31:49,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:49,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877952613] [2022-07-21 09:31:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:49,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:31:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:31:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877952613] [2022-07-21 09:31:49,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877952613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:49,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:49,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:31:49,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799275243] [2022-07-21 09:31:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:49,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:31:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:49,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:31:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:31:49,811 INFO L87 Difference]: Start difference. First operand has 153 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 104 states have internal predecessors, (134), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 09:31:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:50,067 INFO L93 Difference]: Finished difference Result 318 states and 453 transitions. [2022-07-21 09:31:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:31:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-21 09:31:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:50,083 INFO L225 Difference]: With dead ends: 318 [2022-07-21 09:31:50,083 INFO L226 Difference]: Without dead ends: 168 [2022-07-21 09:31:50,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:31:50,095 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 90 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:50,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 232 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:31:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-21 09:31:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2022-07-21 09:31:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 98 states have internal predecessors, (120), 37 states have call successors, (37), 11 states have call predecessors, (37), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-21 09:31:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2022-07-21 09:31:50,129 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 48 [2022-07-21 09:31:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:50,129 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2022-07-21 09:31:50,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 09:31:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2022-07-21 09:31:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 09:31:50,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:50,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:50,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:31:50,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1409458321, now seen corresponding path program 1 times [2022-07-21 09:31:50,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:50,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474345161] [2022-07-21 09:31:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:31:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:31:50,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474345161] [2022-07-21 09:31:50,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474345161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:50,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:50,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:31:50,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936978193] [2022-07-21 09:31:50,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:50,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:31:50,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:50,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:31:50,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:31:50,354 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 09:31:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:50,840 INFO L93 Difference]: Finished difference Result 323 states and 440 transitions. [2022-07-21 09:31:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:31:50,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2022-07-21 09:31:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:50,845 INFO L225 Difference]: With dead ends: 323 [2022-07-21 09:31:50,845 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 09:31:50,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:31:50,847 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 311 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:50,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 327 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:31:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 09:31:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2022-07-21 09:31:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 101 states have internal predecessors, (122), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (40), 36 states have call predecessors, (40), 36 states have call successors, (40) [2022-07-21 09:31:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 199 transitions. [2022-07-21 09:31:50,867 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 199 transitions. Word has length 50 [2022-07-21 09:31:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:50,868 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 199 transitions. [2022-07-21 09:31:50,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-21 09:31:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 199 transitions. [2022-07-21 09:31:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 09:31:50,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:50,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:31:50,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:50,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:50,870 INFO L85 PathProgramCache]: Analyzing trace with hash -564986084, now seen corresponding path program 1 times [2022-07-21 09:31:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:50,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209627894] [2022-07-21 09:31:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:50,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:31:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:51,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209627894] [2022-07-21 09:31:51,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209627894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:51,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:51,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:31:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94934894] [2022-07-21 09:31:51,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:31:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:51,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:31:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:31:51,148 INFO L87 Difference]: Start difference. First operand 149 states and 199 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:51,714 INFO L93 Difference]: Finished difference Result 261 states and 346 transitions. [2022-07-21 09:31:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:31:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2022-07-21 09:31:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:51,716 INFO L225 Difference]: With dead ends: 261 [2022-07-21 09:31:51,717 INFO L226 Difference]: Without dead ends: 203 [2022-07-21 09:31:51,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:31:51,718 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:51,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 533 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:31:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-21 09:31:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2022-07-21 09:31:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 104 states have internal predecessors, (125), 37 states have call successors, (37), 11 states have call predecessors, (37), 13 states have return successors, (41), 37 states have call predecessors, (41), 36 states have call successors, (41) [2022-07-21 09:31:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 203 transitions. [2022-07-21 09:31:51,730 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 203 transitions. Word has length 56 [2022-07-21 09:31:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:51,730 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 203 transitions. [2022-07-21 09:31:51,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:31:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 203 transitions. [2022-07-21 09:31:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 09:31:51,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:51,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:51,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:31:51,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1211897445, now seen corresponding path program 1 times [2022-07-21 09:31:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:51,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273053674] [2022-07-21 09:31:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:51,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:31:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-21 09:31:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 09:31:51,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273053674] [2022-07-21 09:31:51,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273053674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840761398] [2022-07-21 09:31:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:51,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:51,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:51,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:31:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:31:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:31:52,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:52,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840761398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:52,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:52,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-21 09:31:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576583364] [2022-07-21 09:31:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:52,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:31:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:31:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:31:52,466 INFO L87 Difference]: Start difference. First operand 153 states and 203 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 09:31:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:52,653 INFO L93 Difference]: Finished difference Result 280 states and 370 transitions. [2022-07-21 09:31:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:31:52,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2022-07-21 09:31:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:52,655 INFO L225 Difference]: With dead ends: 280 [2022-07-21 09:31:52,655 INFO L226 Difference]: Without dead ends: 150 [2022-07-21 09:31:52,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:31:52,656 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 258 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:52,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 621 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:31:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-21 09:31:52,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-07-21 09:31:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 100 states have (on average 1.22) internal successors, (122), 101 states have internal predecessors, (122), 37 states have call successors, (37), 11 states have call predecessors, (37), 12 states have return successors, (37), 37 states have call predecessors, (37), 36 states have call successors, (37) [2022-07-21 09:31:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 196 transitions. [2022-07-21 09:31:52,665 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 196 transitions. Word has length 63 [2022-07-21 09:31:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:52,666 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 196 transitions. [2022-07-21 09:31:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 09:31:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 196 transitions. [2022-07-21 09:31:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 09:31:52,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:52,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:52,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:52,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:52,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -747455974, now seen corresponding path program 1 times [2022-07-21 09:31:52,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:52,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223165970] [2022-07-21 09:31:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:31:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 09:31:53,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223165970] [2022-07-21 09:31:53,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223165970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:53,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:53,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:31:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219913905] [2022-07-21 09:31:53,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:31:53,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:31:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:31:53,135 INFO L87 Difference]: Start difference. First operand 150 states and 196 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:31:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:53,820 INFO L93 Difference]: Finished difference Result 212 states and 286 transitions. [2022-07-21 09:31:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:31:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2022-07-21 09:31:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:53,822 INFO L225 Difference]: With dead ends: 212 [2022-07-21 09:31:53,822 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 09:31:53,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:31:53,823 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 298 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:53,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 693 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:31:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 09:31:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 159. [2022-07-21 09:31:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 108 states have internal predecessors, (128), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-21 09:31:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2022-07-21 09:31:53,835 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 68 [2022-07-21 09:31:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:53,835 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2022-07-21 09:31:53,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:31:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2022-07-21 09:31:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 09:31:53,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:53,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:31:53,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2108361110, now seen corresponding path program 1 times [2022-07-21 09:31:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970316662] [2022-07-21 09:31:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:53,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:31:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 09:31:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 09:31:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:54,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970316662] [2022-07-21 09:31:54,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970316662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:54,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:54,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:31:54,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198075760] [2022-07-21 09:31:54,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:54,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:31:54,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:54,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:31:54,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:31:54,058 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:31:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:54,640 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2022-07-21 09:31:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:31:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-07-21 09:31:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:54,657 INFO L225 Difference]: With dead ends: 281 [2022-07-21 09:31:54,657 INFO L226 Difference]: Without dead ends: 217 [2022-07-21 09:31:54,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:31:54,658 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 117 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:54,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 571 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:31:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-21 09:31:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 159. [2022-07-21 09:31:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 108 states have internal predecessors, (128), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-21 09:31:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2022-07-21 09:31:54,669 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 70 [2022-07-21 09:31:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:54,669 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2022-07-21 09:31:54,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:31:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2022-07-21 09:31:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 09:31:54,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:54,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:54,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:31:54,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash -856300446, now seen corresponding path program 1 times [2022-07-21 09:31:54,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:54,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790229507] [2022-07-21 09:31:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:31:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:31:54,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790229507] [2022-07-21 09:31:54,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790229507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:54,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:31:54,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:31:54,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750267987] [2022-07-21 09:31:54,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:54,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:31:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:31:54,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:31:54,899 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:31:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:55,404 INFO L93 Difference]: Finished difference Result 377 states and 539 transitions. [2022-07-21 09:31:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:31:55,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 72 [2022-07-21 09:31:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:55,407 INFO L225 Difference]: With dead ends: 377 [2022-07-21 09:31:55,407 INFO L226 Difference]: Without dead ends: 234 [2022-07-21 09:31:55,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:31:55,408 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 377 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:55,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 367 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:31:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-21 09:31:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 164. [2022-07-21 09:31:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 38 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-21 09:31:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 217 transitions. [2022-07-21 09:31:55,419 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 217 transitions. Word has length 72 [2022-07-21 09:31:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:55,419 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 217 transitions. [2022-07-21 09:31:55,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:31:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 217 transitions. [2022-07-21 09:31:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 09:31:55,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:55,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:55,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:31:55,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash -598135008, now seen corresponding path program 1 times [2022-07-21 09:31:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:55,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42140230] [2022-07-21 09:31:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:55,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:31:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:31:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42140230] [2022-07-21 09:31:55,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42140230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802500899] [2022-07-21 09:31:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:55,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:55,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:55,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:55,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:31:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 09:31:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:56,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:31:56,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:31:56,378 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-21 09:31:56,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-07-21 09:31:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:31:56,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:56,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802500899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:56,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:56,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 18 [2022-07-21 09:31:56,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487279462] [2022-07-21 09:31:56,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:56,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:31:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:31:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:31:56,382 INFO L87 Difference]: Start difference. First operand 164 states and 217 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 09:31:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:56,483 INFO L93 Difference]: Finished difference Result 335 states and 441 transitions. [2022-07-21 09:31:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:31:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 72 [2022-07-21 09:31:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:56,485 INFO L225 Difference]: With dead ends: 335 [2022-07-21 09:31:56,485 INFO L226 Difference]: Without dead ends: 183 [2022-07-21 09:31:56,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:31:56,486 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 19 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:56,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1337 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2022-07-21 09:31:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-21 09:31:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-07-21 09:31:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 131 states have internal predecessors, (158), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2022-07-21 09:31:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2022-07-21 09:31:56,495 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 72 [2022-07-21 09:31:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:56,495 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2022-07-21 09:31:56,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 09:31:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2022-07-21 09:31:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 09:31:56,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:56,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:56,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-21 09:31:56,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:56,717 INFO L85 PathProgramCache]: Analyzing trace with hash -951223390, now seen corresponding path program 1 times [2022-07-21 09:31:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:56,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101398788] [2022-07-21 09:31:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-21 09:31:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 09:31:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:31:56,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101398788] [2022-07-21 09:31:56,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101398788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685007837] [2022-07-21 09:31:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:56,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:56,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:56,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:56,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:31:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:31:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:31:57,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:57,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685007837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:57,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:57,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-07-21 09:31:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415004336] [2022-07-21 09:31:57,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:57,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:31:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:31:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:31:57,214 INFO L87 Difference]: Start difference. First operand 183 states and 240 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:57,235 INFO L93 Difference]: Finished difference Result 344 states and 460 transitions. [2022-07-21 09:31:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:31:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 72 [2022-07-21 09:31:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:57,237 INFO L225 Difference]: With dead ends: 344 [2022-07-21 09:31:57,237 INFO L226 Difference]: Without dead ends: 192 [2022-07-21 09:31:57,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:31:57,238 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 20 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:57,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 568 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:31:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-21 09:31:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2022-07-21 09:31:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.221311475409836) internal successors, (149), 123 states have internal predecessors, (149), 38 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (43), 38 states have call predecessors, (43), 37 states have call successors, (43) [2022-07-21 09:31:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2022-07-21 09:31:57,246 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 72 [2022-07-21 09:31:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:57,246 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2022-07-21 09:31:57,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2022-07-21 09:31:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 09:31:57,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:57,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:57,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:57,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:57,466 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash -188012506, now seen corresponding path program 1 times [2022-07-21 09:31:57,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:57,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802036378] [2022-07-21 09:31:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:57,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 09:31:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 09:31:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-21 09:31:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 09:31:57,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:57,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802036378] [2022-07-21 09:31:57,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802036378] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:57,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819477213] [2022-07-21 09:31:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:57,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:57,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:57,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:31:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 2514 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 09:31:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:31:58,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:58,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819477213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:58,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:58,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2022-07-21 09:31:58,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640393038] [2022-07-21 09:31:58,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:58,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:31:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:31:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:31:58,075 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 09:31:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:58,163 INFO L93 Difference]: Finished difference Result 332 states and 439 transitions. [2022-07-21 09:31:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:31:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2022-07-21 09:31:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:58,164 INFO L225 Difference]: With dead ends: 332 [2022-07-21 09:31:58,164 INFO L226 Difference]: Without dead ends: 180 [2022-07-21 09:31:58,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:31:58,166 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 12 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:58,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1431 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 09:31:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-21 09:31:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-07-21 09:31:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-21 09:31:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 239 transitions. [2022-07-21 09:31:58,180 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 239 transitions. Word has length 76 [2022-07-21 09:31:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:58,180 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 239 transitions. [2022-07-21 09:31:58,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 09:31:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 239 transitions. [2022-07-21 09:31:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 09:31:58,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:58,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:58,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:58,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash 908856363, now seen corresponding path program 1 times [2022-07-21 09:31:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:58,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746029819] [2022-07-21 09:31:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:31:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:31:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:31:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746029819] [2022-07-21 09:31:58,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746029819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287288378] [2022-07-21 09:31:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:58,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:58,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:31:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:31:58,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:31:58,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:58,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287288378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:58,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:58,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-07-21 09:31:58,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155312858] [2022-07-21 09:31:58,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:58,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:31:58,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:31:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:31:58,930 INFO L87 Difference]: Start difference. First operand 180 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:58,954 INFO L93 Difference]: Finished difference Result 342 states and 461 transitions. [2022-07-21 09:31:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:31:58,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2022-07-21 09:31:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:58,955 INFO L225 Difference]: With dead ends: 342 [2022-07-21 09:31:58,955 INFO L226 Difference]: Without dead ends: 183 [2022-07-21 09:31:58,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:31:58,956 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:58,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 561 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:31:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-21 09:31:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-07-21 09:31:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 126 states have (on average 1.1984126984126984) internal successors, (151), 128 states have internal predecessors, (151), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-21 09:31:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 237 transitions. [2022-07-21 09:31:58,964 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 237 transitions. Word has length 78 [2022-07-21 09:31:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:58,964 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 237 transitions. [2022-07-21 09:31:58,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 237 transitions. [2022-07-21 09:31:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 09:31:58,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:58,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:58,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:31:59,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 09:31:59,185 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:59,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1518245265, now seen corresponding path program 1 times [2022-07-21 09:31:59,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:59,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046978410] [2022-07-21 09:31:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:59,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:31:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:31:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:31:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:31:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:31:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:31:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:31:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:31:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:31:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:31:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:31:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046978410] [2022-07-21 09:31:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046978410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:31:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326946083] [2022-07-21 09:31:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:59,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:59,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:31:59,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:31:59,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:31:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:31:59,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 09:31:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:31:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 09:31:59,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:31:59,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326946083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:31:59,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:31:59,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-07-21 09:31:59,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472231611] [2022-07-21 09:31:59,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:31:59,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:31:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:31:59,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:31:59,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:31:59,662 INFO L87 Difference]: Start difference. First operand 180 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:31:59,682 INFO L93 Difference]: Finished difference Result 348 states and 473 transitions. [2022-07-21 09:31:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:31:59,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 78 [2022-07-21 09:31:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:31:59,684 INFO L225 Difference]: With dead ends: 348 [2022-07-21 09:31:59,684 INFO L226 Difference]: Without dead ends: 189 [2022-07-21 09:31:59,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:31:59,685 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 34 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:31:59,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:31:59,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-21 09:31:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2022-07-21 09:31:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 122 states have (on average 1.180327868852459) internal successors, (144), 124 states have internal predecessors, (144), 38 states have call successors, (38), 13 states have call predecessors, (38), 15 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2022-07-21 09:31:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2022-07-21 09:31:59,693 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 78 [2022-07-21 09:31:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:31:59,693 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2022-07-21 09:31:59,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 09:31:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2022-07-21 09:31:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 09:31:59,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:31:59,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:31:59,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 09:31:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:31:59,917 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:31:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:31:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1074344591, now seen corresponding path program 1 times [2022-07-21 09:31:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:31:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489016868] [2022-07-21 09:31:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:31:59,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:32:00,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:00,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489016868] [2022-07-21 09:32:00,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489016868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:00,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672917503] [2022-07-21 09:32:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:00,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:00,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:00,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:00,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:32:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:00,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2516 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 09:32:00,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:01,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:32:01,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:01,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672917503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:01,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:01,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-07-21 09:32:01,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674453900] [2022-07-21 09:32:01,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:01,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:32:01,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:32:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:32:01,687 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand has 25 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-21 09:32:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:03,800 INFO L93 Difference]: Finished difference Result 366 states and 491 transitions. [2022-07-21 09:32:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:32:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 78 [2022-07-21 09:32:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:03,802 INFO L225 Difference]: With dead ends: 366 [2022-07-21 09:32:03,802 INFO L226 Difference]: Without dead ends: 316 [2022-07-21 09:32:03,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=369, Invalid=1699, Unknown=2, NotChecked=0, Total=2070 [2022-07-21 09:32:03,803 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 424 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:03,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1200 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2319 Invalid, 0 Unknown, 963 Unchecked, 1.6s Time] [2022-07-21 09:32:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-21 09:32:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 228. [2022-07-21 09:32:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 45 states have call successors, (45), 15 states have call predecessors, (45), 20 states have return successors, (60), 47 states have call predecessors, (60), 44 states have call successors, (60) [2022-07-21 09:32:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 295 transitions. [2022-07-21 09:32:03,814 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 295 transitions. Word has length 78 [2022-07-21 09:32:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:03,815 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 295 transitions. [2022-07-21 09:32:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-21 09:32:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 295 transitions. [2022-07-21 09:32:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 09:32:03,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:03,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:03,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:04,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:04,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash 94245687, now seen corresponding path program 1 times [2022-07-21 09:32:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:04,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107589810] [2022-07-21 09:32:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:32:04,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107589810] [2022-07-21 09:32:04,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107589810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:04,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247676912] [2022-07-21 09:32:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:04,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:04,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:04,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:04,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:32:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:32:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:04,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:32:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:32:05,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:11,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247676912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:11,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:11,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-21 09:32:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740679860] [2022-07-21 09:32:11,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 09:32:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 09:32:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=990, Unknown=1, NotChecked=0, Total=1122 [2022-07-21 09:32:11,046 INFO L87 Difference]: Start difference. First operand 228 states and 295 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-21 09:32:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:13,993 INFO L93 Difference]: Finished difference Result 418 states and 588 transitions. [2022-07-21 09:32:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:32:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 78 [2022-07-21 09:32:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:13,995 INFO L225 Difference]: With dead ends: 418 [2022-07-21 09:32:13,995 INFO L226 Difference]: Without dead ends: 386 [2022-07-21 09:32:13,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=541, Invalid=2645, Unknown=6, NotChecked=0, Total=3192 [2022-07-21 09:32:13,996 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 478 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1236 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:13,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1237 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2861 Invalid, 0 Unknown, 1236 Unchecked, 2.0s Time] [2022-07-21 09:32:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-21 09:32:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 269. [2022-07-21 09:32:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 194 states have (on average 1.1546391752577319) internal successors, (224), 197 states have internal predecessors, (224), 51 states have call successors, (51), 17 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2022-07-21 09:32:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 352 transitions. [2022-07-21 09:32:14,012 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 352 transitions. Word has length 78 [2022-07-21 09:32:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 352 transitions. [2022-07-21 09:32:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 23 states have internal predecessors, (83), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-21 09:32:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 352 transitions. [2022-07-21 09:32:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 09:32:14,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:14,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:14,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:14,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:32:14,228 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash 352411125, now seen corresponding path program 1 times [2022-07-21 09:32:14,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:14,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526039728] [2022-07-21 09:32:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:14,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:32:14,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:14,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526039728] [2022-07-21 09:32:14,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526039728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:14,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:14,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:32:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71721444] [2022-07-21 09:32:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:14,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:32:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:32:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:32:14,415 INFO L87 Difference]: Start difference. First operand 269 states and 352 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:32:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:14,943 INFO L93 Difference]: Finished difference Result 549 states and 769 transitions. [2022-07-21 09:32:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:32:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 78 [2022-07-21 09:32:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:14,945 INFO L225 Difference]: With dead ends: 549 [2022-07-21 09:32:14,945 INFO L226 Difference]: Without dead ends: 320 [2022-07-21 09:32:14,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:32:14,946 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 314 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:14,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 369 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:32:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-21 09:32:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 267. [2022-07-21 09:32:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 192 states have (on average 1.140625) internal successors, (219), 195 states have internal predecessors, (219), 51 states have call successors, (51), 17 states have call predecessors, (51), 23 states have return successors, (77), 54 states have call predecessors, (77), 50 states have call successors, (77) [2022-07-21 09:32:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 347 transitions. [2022-07-21 09:32:14,959 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 347 transitions. Word has length 78 [2022-07-21 09:32:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:14,960 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 347 transitions. [2022-07-21 09:32:14,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:32:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 347 transitions. [2022-07-21 09:32:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 09:32:14,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:14,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:14,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:32:14,961 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash -258842695, now seen corresponding path program 1 times [2022-07-21 09:32:14,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125302215] [2022-07-21 09:32:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:32:15,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125302215] [2022-07-21 09:32:15,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125302215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:15,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509039404] [2022-07-21 09:32:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:15,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:15,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:15,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:32:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 09:32:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:16,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:32:16,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:17,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509039404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:17,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:32:17,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2022-07-21 09:32:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870125709] [2022-07-21 09:32:17,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 09:32:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 09:32:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2022-07-21 09:32:17,465 INFO L87 Difference]: Start difference. First operand 267 states and 347 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-21 09:32:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:19,900 INFO L93 Difference]: Finished difference Result 387 states and 531 transitions. [2022-07-21 09:32:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:32:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 78 [2022-07-21 09:32:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:19,902 INFO L225 Difference]: With dead ends: 387 [2022-07-21 09:32:19,902 INFO L226 Difference]: Without dead ends: 355 [2022-07-21 09:32:19,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=493, Invalid=2260, Unknown=3, NotChecked=0, Total=2756 [2022-07-21 09:32:19,907 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 473 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:19,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 874 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1409 Invalid, 0 Unknown, 662 Unchecked, 1.1s Time] [2022-07-21 09:32:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-21 09:32:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 291. [2022-07-21 09:32:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 212 states have (on average 1.1320754716981132) internal successors, (240), 218 states have internal predecessors, (240), 53 states have call successors, (53), 18 states have call predecessors, (53), 25 states have return successors, (81), 54 states have call predecessors, (81), 52 states have call successors, (81) [2022-07-21 09:32:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2022-07-21 09:32:19,938 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 78 [2022-07-21 09:32:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:19,938 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2022-07-21 09:32:19,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 24 states have internal predecessors, (90), 7 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-21 09:32:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2022-07-21 09:32:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 09:32:19,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:19,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:19,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:20,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:32:20,151 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 394720380, now seen corresponding path program 1 times [2022-07-21 09:32:20,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:20,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695644630] [2022-07-21 09:32:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:20,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 09:32:20,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695644630] [2022-07-21 09:32:20,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695644630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:20,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:20,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:32:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608718601] [2022-07-21 09:32:20,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:20,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:32:20,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:32:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:32:20,358 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:32:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:21,143 INFO L93 Difference]: Finished difference Result 347 states and 471 transitions. [2022-07-21 09:32:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:32:21,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 80 [2022-07-21 09:32:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:21,145 INFO L225 Difference]: With dead ends: 347 [2022-07-21 09:32:21,145 INFO L226 Difference]: Without dead ends: 345 [2022-07-21 09:32:21,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:32:21,146 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 145 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:21,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 872 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-21 09:32:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 291. [2022-07-21 09:32:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 212 states have (on average 1.1320754716981132) internal successors, (240), 218 states have internal predecessors, (240), 53 states have call successors, (53), 18 states have call predecessors, (53), 25 states have return successors, (81), 54 states have call predecessors, (81), 52 states have call successors, (81) [2022-07-21 09:32:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2022-07-21 09:32:21,161 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 80 [2022-07-21 09:32:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:21,161 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2022-07-21 09:32:21,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:32:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2022-07-21 09:32:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 09:32:21,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:21,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:21,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:32:21,162 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:21,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1080266240, now seen corresponding path program 1 times [2022-07-21 09:32:21,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:21,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846633729] [2022-07-21 09:32:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:21,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:32:21,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:21,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846633729] [2022-07-21 09:32:21,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846633729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:21,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:21,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-21 09:32:21,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721106235] [2022-07-21 09:32:21,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:21,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:32:21,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:21,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:32:21,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:32:21,634 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 09:32:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:23,229 INFO L93 Difference]: Finished difference Result 366 states and 496 transitions. [2022-07-21 09:32:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 09:32:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 80 [2022-07-21 09:32:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:23,231 INFO L225 Difference]: With dead ends: 366 [2022-07-21 09:32:23,231 INFO L226 Difference]: Without dead ends: 364 [2022-07-21 09:32:23,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:32:23,232 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 372 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:23,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 882 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-21 09:32:23,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-21 09:32:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 291. [2022-07-21 09:32:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 212 states have (on average 1.1320754716981132) internal successors, (240), 218 states have internal predecessors, (240), 53 states have call successors, (53), 18 states have call predecessors, (53), 25 states have return successors, (81), 54 states have call predecessors, (81), 52 states have call successors, (81) [2022-07-21 09:32:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2022-07-21 09:32:23,248 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 80 [2022-07-21 09:32:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:23,248 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2022-07-21 09:32:23,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 09:32:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2022-07-21 09:32:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 09:32:23,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:23,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:23,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:32:23,250 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:23,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:23,250 INFO L85 PathProgramCache]: Analyzing trace with hash -650434166, now seen corresponding path program 1 times [2022-07-21 09:32:23,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:23,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006914680] [2022-07-21 09:32:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:23,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:32:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 09:32:23,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006914680] [2022-07-21 09:32:23,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006914680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:23,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:23,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:32:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406763429] [2022-07-21 09:32:23,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:23,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:23,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:23,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:23,397 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:32:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:23,817 INFO L93 Difference]: Finished difference Result 330 states and 435 transitions. [2022-07-21 09:32:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:32:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 81 [2022-07-21 09:32:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:23,819 INFO L225 Difference]: With dead ends: 330 [2022-07-21 09:32:23,819 INFO L226 Difference]: Without dead ends: 328 [2022-07-21 09:32:23,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:32:23,819 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 112 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:23,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 874 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-21 09:32:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 296. [2022-07-21 09:32:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 215 states have (on average 1.130232558139535) internal successors, (243), 221 states have internal predecessors, (243), 54 states have call successors, (54), 19 states have call predecessors, (54), 26 states have return successors, (82), 55 states have call predecessors, (82), 53 states have call successors, (82) [2022-07-21 09:32:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 379 transitions. [2022-07-21 09:32:23,834 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 379 transitions. Word has length 81 [2022-07-21 09:32:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:23,835 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 379 transitions. [2022-07-21 09:32:23,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-21 09:32:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 379 transitions. [2022-07-21 09:32:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 09:32:23,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:23,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:23,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:32:23,837 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash -306040688, now seen corresponding path program 1 times [2022-07-21 09:32:23,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:23,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218434021] [2022-07-21 09:32:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 09:32:24,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218434021] [2022-07-21 09:32:24,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218434021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:24,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:24,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:32:24,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969030584] [2022-07-21 09:32:24,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:24,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:24,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:24,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:24,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:32:24,117 INFO L87 Difference]: Start difference. First operand 296 states and 379 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 09:32:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:24,826 INFO L93 Difference]: Finished difference Result 365 states and 495 transitions. [2022-07-21 09:32:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:32:24,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2022-07-21 09:32:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:24,828 INFO L225 Difference]: With dead ends: 365 [2022-07-21 09:32:24,828 INFO L226 Difference]: Without dead ends: 363 [2022-07-21 09:32:24,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:32:24,829 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 302 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:24,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 485 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-21 09:32:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 304. [2022-07-21 09:32:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 219 states have (on average 1.1278538812785388) internal successors, (247), 225 states have internal predecessors, (247), 57 states have call successors, (57), 20 states have call predecessors, (57), 27 states have return successors, (85), 58 states have call predecessors, (85), 56 states have call successors, (85) [2022-07-21 09:32:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 389 transitions. [2022-07-21 09:32:24,845 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 389 transitions. Word has length 86 [2022-07-21 09:32:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:24,845 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 389 transitions. [2022-07-21 09:32:24,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 09:32:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 389 transitions. [2022-07-21 09:32:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-21 09:32:24,846 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:24,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:24,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:32:24,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 748766864, now seen corresponding path program 1 times [2022-07-21 09:32:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:24,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466722525] [2022-07-21 09:32:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 09:32:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 09:32:25,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:25,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466722525] [2022-07-21 09:32:25,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466722525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:25,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549813680] [2022-07-21 09:32:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:25,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:25,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:25,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:25,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:32:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 09:32:25,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:25,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 09:32:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:32:26,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:26,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549813680] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:26,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:26,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 34 [2022-07-21 09:32:26,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427463646] [2022-07-21 09:32:26,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:26,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:32:26,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:32:26,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 09:32:26,586 INFO L87 Difference]: Start difference. First operand 304 states and 389 transitions. Second operand has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 29 states have internal predecessors, (150), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-21 09:32:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:29,377 INFO L93 Difference]: Finished difference Result 708 states and 947 transitions. [2022-07-21 09:32:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 09:32:29,378 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 29 states have internal predecessors, (150), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 85 [2022-07-21 09:32:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:29,380 INFO L225 Difference]: With dead ends: 708 [2022-07-21 09:32:29,380 INFO L226 Difference]: Without dead ends: 444 [2022-07-21 09:32:29,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 159 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=3704, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 09:32:29,382 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 433 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:29,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 2407 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3344 Invalid, 0 Unknown, 304 Unchecked, 1.9s Time] [2022-07-21 09:32:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-21 09:32:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 330. [2022-07-21 09:32:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 242 states have (on average 1.128099173553719) internal successors, (273), 250 states have internal predecessors, (273), 57 states have call successors, (57), 21 states have call predecessors, (57), 30 states have return successors, (89), 58 states have call predecessors, (89), 56 states have call successors, (89) [2022-07-21 09:32:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 419 transitions. [2022-07-21 09:32:29,401 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 419 transitions. Word has length 85 [2022-07-21 09:32:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:29,401 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 419 transitions. [2022-07-21 09:32:29,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 29 states have internal predecessors, (150), 11 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-21 09:32:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 419 transitions. [2022-07-21 09:32:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:32:29,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:29,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:29,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:29,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 09:32:29,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1622871588, now seen corresponding path program 1 times [2022-07-21 09:32:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:29,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122390332] [2022-07-21 09:32:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 09:32:29,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:29,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122390332] [2022-07-21 09:32:29,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122390332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:29,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829111136] [2022-07-21 09:32:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:29,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:29,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:29,788 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:29,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:32:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 09:32:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:30,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:30,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:30,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-21 09:32:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:32:30,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-21 09:32:30,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:32:30,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 09:32:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 09:32:30,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:30,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829111136] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:30,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:30,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2022-07-21 09:32:30,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170450817] [2022-07-21 09:32:30,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:30,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:30,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:32:30,516 INFO L87 Difference]: Start difference. First operand 330 states and 419 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 09:32:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:30,730 INFO L93 Difference]: Finished difference Result 689 states and 883 transitions. [2022-07-21 09:32:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:32:30,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 89 [2022-07-21 09:32:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:30,734 INFO L225 Difference]: With dead ends: 689 [2022-07-21 09:32:30,735 INFO L226 Difference]: Without dead ends: 421 [2022-07-21 09:32:30,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:32:30,738 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 29 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:30,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1028 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-07-21 09:32:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-21 09:32:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 371. [2022-07-21 09:32:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 274 states have (on average 1.1167883211678833) internal successors, (306), 282 states have internal predecessors, (306), 62 states have call successors, (62), 26 states have call predecessors, (62), 34 states have return successors, (95), 62 states have call predecessors, (95), 61 states have call successors, (95) [2022-07-21 09:32:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 463 transitions. [2022-07-21 09:32:30,759 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 463 transitions. Word has length 89 [2022-07-21 09:32:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:30,759 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 463 transitions. [2022-07-21 09:32:30,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 09:32:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 463 transitions. [2022-07-21 09:32:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 09:32:30,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:30,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:30,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:30,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 09:32:30,982 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1189142502, now seen corresponding path program 1 times [2022-07-21 09:32:30,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:30,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598033131] [2022-07-21 09:32:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:30,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 09:32:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 09:32:31,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598033131] [2022-07-21 09:32:31,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598033131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134075880] [2022-07-21 09:32:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:31,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:31,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:31,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:31,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:32:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 09:32:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 09:32:31,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:32:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134075880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:31,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:32:31,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2022-07-21 09:32:31,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661255018] [2022-07-21 09:32:31,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:31,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:32:31,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:32:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:31,534 INFO L87 Difference]: Start difference. First operand 371 states and 463 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:31,589 INFO L93 Difference]: Finished difference Result 659 states and 827 transitions. [2022-07-21 09:32:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:32:31,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-07-21 09:32:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:31,591 INFO L225 Difference]: With dead ends: 659 [2022-07-21 09:32:31,592 INFO L226 Difference]: Without dead ends: 372 [2022-07-21 09:32:31,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:31,593 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 10 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:31,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 09:32:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-07-21 09:32:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-07-21 09:32:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 275 states have (on average 1.1163636363636364) internal successors, (307), 282 states have internal predecessors, (307), 62 states have call successors, (62), 26 states have call predecessors, (62), 34 states have return successors, (95), 63 states have call predecessors, (95), 61 states have call successors, (95) [2022-07-21 09:32:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 464 transitions. [2022-07-21 09:32:31,612 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 464 transitions. Word has length 89 [2022-07-21 09:32:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:31,613 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 464 transitions. [2022-07-21 09:32:31,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 09:32:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 464 transitions. [2022-07-21 09:32:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 09:32:31,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:31,614 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:31,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:31,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 09:32:31,828 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:31,829 INFO L85 PathProgramCache]: Analyzing trace with hash 119789218, now seen corresponding path program 1 times [2022-07-21 09:32:31,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:31,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634225466] [2022-07-21 09:32:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:31,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:31,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:32:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 09:32:32,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:32,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634225466] [2022-07-21 09:32:32,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634225466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:32,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:32,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:32:32,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880349398] [2022-07-21 09:32:32,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:32,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:32,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:32,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:32:32,026 INFO L87 Difference]: Start difference. First operand 372 states and 464 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:32:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:32,758 INFO L93 Difference]: Finished difference Result 437 states and 579 transitions. [2022-07-21 09:32:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:32:32,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-07-21 09:32:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:32,760 INFO L225 Difference]: With dead ends: 437 [2022-07-21 09:32:32,760 INFO L226 Difference]: Without dead ends: 435 [2022-07-21 09:32:32,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:32:32,761 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 157 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:32,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 510 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-07-21 09:32:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 394. [2022-07-21 09:32:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 290 states have (on average 1.1172413793103448) internal successors, (324), 298 states have internal predecessors, (324), 66 states have call successors, (66), 27 states have call predecessors, (66), 37 states have return successors, (106), 68 states have call predecessors, (106), 65 states have call successors, (106) [2022-07-21 09:32:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 496 transitions. [2022-07-21 09:32:32,793 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 496 transitions. Word has length 92 [2022-07-21 09:32:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:32,794 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 496 transitions. [2022-07-21 09:32:32,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 09:32:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 496 transitions. [2022-07-21 09:32:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 09:32:32,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:32,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:32,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 09:32:32,795 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1126537668, now seen corresponding path program 1 times [2022-07-21 09:32:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:32,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746284880] [2022-07-21 09:32:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:32,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:32,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 09:32:33,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:33,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746284880] [2022-07-21 09:32:33,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746284880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:33,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927929137] [2022-07-21 09:32:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:33,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:33,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:33,046 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:33,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:32:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:33,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 09:32:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:33,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:32:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:32:34,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:34,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927929137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:34,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:34,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 37 [2022-07-21 09:32:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37731897] [2022-07-21 09:32:34,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:32:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:32:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:32:34,927 INFO L87 Difference]: Start difference. First operand 394 states and 496 transitions. Second operand has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 34 states have internal predecessors, (160), 9 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-07-21 09:32:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:39,718 INFO L93 Difference]: Finished difference Result 757 states and 1005 transitions. [2022-07-21 09:32:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:32:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 34 states have internal predecessors, (160), 9 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 96 [2022-07-21 09:32:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:39,721 INFO L225 Difference]: With dead ends: 757 [2022-07-21 09:32:39,721 INFO L226 Difference]: Without dead ends: 633 [2022-07-21 09:32:39,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 185 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 09:32:39,723 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 345 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 5069 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 5805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:39,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 3453 Invalid, 5805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5069 Invalid, 0 Unknown, 583 Unchecked, 3.6s Time] [2022-07-21 09:32:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-07-21 09:32:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 484. [2022-07-21 09:32:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 352 states have (on average 1.1392045454545454) internal successors, (401), 365 states have internal predecessors, (401), 86 states have call successors, (86), 29 states have call predecessors, (86), 45 states have return successors, (152), 89 states have call predecessors, (152), 85 states have call successors, (152) [2022-07-21 09:32:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 639 transitions. [2022-07-21 09:32:39,755 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 639 transitions. Word has length 96 [2022-07-21 09:32:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:39,755 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 639 transitions. [2022-07-21 09:32:39,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.324324324324325) internal successors, (160), 34 states have internal predecessors, (160), 9 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-07-21 09:32:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 639 transitions. [2022-07-21 09:32:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 09:32:39,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:39,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:39,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:39,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-21 09:32:39,972 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1329458343, now seen corresponding path program 1 times [2022-07-21 09:32:39,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:39,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266662824] [2022-07-21 09:32:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:39,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-21 09:32:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-21 09:32:40,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:40,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266662824] [2022-07-21 09:32:40,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266662824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:40,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:40,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:32:40,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263669998] [2022-07-21 09:32:40,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:40,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:32:40,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:40,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:32:40,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:32:40,318 INFO L87 Difference]: Start difference. First operand 484 states and 639 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 09:32:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:40,949 INFO L93 Difference]: Finished difference Result 843 states and 1120 transitions. [2022-07-21 09:32:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:32:40,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 91 [2022-07-21 09:32:40,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:40,966 INFO L225 Difference]: With dead ends: 843 [2022-07-21 09:32:40,966 INFO L226 Difference]: Without dead ends: 531 [2022-07-21 09:32:40,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:32:40,968 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 132 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:40,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 683 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:32:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-21 09:32:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 509. [2022-07-21 09:32:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 366 states have (on average 1.1366120218579234) internal successors, (416), 380 states have internal predecessors, (416), 94 states have call successors, (94), 30 states have call predecessors, (94), 48 states have return successors, (169), 98 states have call predecessors, (169), 93 states have call successors, (169) [2022-07-21 09:32:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 679 transitions. [2022-07-21 09:32:41,001 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 679 transitions. Word has length 91 [2022-07-21 09:32:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:41,001 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 679 transitions. [2022-07-21 09:32:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 09:32:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 679 transitions. [2022-07-21 09:32:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 09:32:41,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:41,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:41,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 09:32:41,003 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash -223113860, now seen corresponding path program 1 times [2022-07-21 09:32:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099315452] [2022-07-21 09:32:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:41,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099315452] [2022-07-21 09:32:41,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099315452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350605031] [2022-07-21 09:32:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:41,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:41,736 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:41,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:32:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:42,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 09:32:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:42,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:32:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:32:42,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:43,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350605031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:43,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:43,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 11] total 36 [2022-07-21 09:32:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067465218] [2022-07-21 09:32:43,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 09:32:43,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 09:32:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 09:32:43,601 INFO L87 Difference]: Start difference. First operand 509 states and 679 transitions. Second operand has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 32 states have internal predecessors, (149), 9 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-21 09:32:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:46,408 INFO L93 Difference]: Finished difference Result 748 states and 959 transitions. [2022-07-21 09:32:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 09:32:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 32 states have internal predecessors, (149), 9 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 96 [2022-07-21 09:32:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:46,411 INFO L225 Difference]: With dead ends: 748 [2022-07-21 09:32:46,411 INFO L226 Difference]: Without dead ends: 616 [2022-07-21 09:32:46,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=464, Invalid=2842, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 09:32:46,413 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 527 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:46,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1493 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2635 Invalid, 0 Unknown, 520 Unchecked, 1.9s Time] [2022-07-21 09:32:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-07-21 09:32:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 506. [2022-07-21 09:32:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 365 states have (on average 1.1342465753424658) internal successors, (414), 377 states have internal predecessors, (414), 94 states have call successors, (94), 30 states have call predecessors, (94), 46 states have return successors, (156), 98 states have call predecessors, (156), 93 states have call successors, (156) [2022-07-21 09:32:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 664 transitions. [2022-07-21 09:32:46,450 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 664 transitions. Word has length 96 [2022-07-21 09:32:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:46,451 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 664 transitions. [2022-07-21 09:32:46,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 32 states have internal predecessors, (149), 9 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-21 09:32:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 664 transitions. [2022-07-21 09:32:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 09:32:46,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:46,452 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:46,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:46,667 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1572301202, now seen corresponding path program 1 times [2022-07-21 09:32:46,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:46,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997926627] [2022-07-21 09:32:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:32:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:32:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 09:32:46,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997926627] [2022-07-21 09:32:46,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997926627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:46,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:46,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:32:46,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561221141] [2022-07-21 09:32:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:46,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:46,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:46,982 INFO L87 Difference]: Start difference. First operand 506 states and 664 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-21 09:32:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:47,772 INFO L93 Difference]: Finished difference Result 543 states and 726 transitions. [2022-07-21 09:32:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:32:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 99 [2022-07-21 09:32:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:47,774 INFO L225 Difference]: With dead ends: 543 [2022-07-21 09:32:47,774 INFO L226 Difference]: Without dead ends: 541 [2022-07-21 09:32:47,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:32:47,775 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 236 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:47,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 488 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:32:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-07-21 09:32:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 513. [2022-07-21 09:32:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 370 states have (on average 1.1324324324324324) internal successors, (419), 382 states have internal predecessors, (419), 95 states have call successors, (95), 31 states have call predecessors, (95), 47 states have return successors, (157), 99 states have call predecessors, (157), 94 states have call successors, (157) [2022-07-21 09:32:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 671 transitions. [2022-07-21 09:32:47,813 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 671 transitions. Word has length 99 [2022-07-21 09:32:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:47,813 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 671 transitions. [2022-07-21 09:32:47,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-21 09:32:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 671 transitions. [2022-07-21 09:32:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 09:32:47,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:47,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:47,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 09:32:47,815 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1103427007, now seen corresponding path program 1 times [2022-07-21 09:32:47,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:47,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397865460] [2022-07-21 09:32:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:47,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:32:47,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:47,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397865460] [2022-07-21 09:32:47,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397865460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:47,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:47,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:32:47,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523566846] [2022-07-21 09:32:47,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:47,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:32:47,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:32:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:47,982 INFO L87 Difference]: Start difference. First operand 513 states and 671 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:32:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:48,479 INFO L93 Difference]: Finished difference Result 523 states and 682 transitions. [2022-07-21 09:32:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:32:48,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 98 [2022-07-21 09:32:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:48,481 INFO L225 Difference]: With dead ends: 523 [2022-07-21 09:32:48,482 INFO L226 Difference]: Without dead ends: 521 [2022-07-21 09:32:48,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:32:48,482 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 119 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:48,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1090 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:32:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-21 09:32:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 513. [2022-07-21 09:32:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 370 states have (on average 1.1324324324324324) internal successors, (419), 382 states have internal predecessors, (419), 95 states have call successors, (95), 31 states have call predecessors, (95), 47 states have return successors, (157), 99 states have call predecessors, (157), 94 states have call successors, (157) [2022-07-21 09:32:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 671 transitions. [2022-07-21 09:32:48,529 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 671 transitions. Word has length 98 [2022-07-21 09:32:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:48,530 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 671 transitions. [2022-07-21 09:32:48,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-21 09:32:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 671 transitions. [2022-07-21 09:32:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 09:32:48,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:48,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:48,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 09:32:48,531 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:48,532 INFO L85 PathProgramCache]: Analyzing trace with hash -474748987, now seen corresponding path program 1 times [2022-07-21 09:32:48,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:48,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228227726] [2022-07-21 09:32:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:48,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 09:32:48,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228227726] [2022-07-21 09:32:48,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228227726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:32:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587236299] [2022-07-21 09:32:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:48,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:48,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:32:48,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:32:48,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:32:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:49,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 09:32:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:32:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:32:49,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:32:49,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-21 09:32:49,937 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:32:49,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-07-21 09:32:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:32:49,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587236299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:32:49,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:32:49,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 25 [2022-07-21 09:32:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312513623] [2022-07-21 09:32:49,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:32:49,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 09:32:49,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:49,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 09:32:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-07-21 09:32:49,964 INFO L87 Difference]: Start difference. First operand 513 states and 671 transitions. Second operand has 25 states, 25 states have (on average 5.48) internal successors, (137), 22 states have internal predecessors, (137), 7 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-21 09:32:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:52,016 INFO L93 Difference]: Finished difference Result 725 states and 930 transitions. [2022-07-21 09:32:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 09:32:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 22 states have internal predecessors, (137), 7 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2022-07-21 09:32:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:52,019 INFO L225 Difference]: With dead ends: 725 [2022-07-21 09:32:52,019 INFO L226 Difference]: Without dead ends: 624 [2022-07-21 09:32:52,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 09:32:52,020 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 303 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:52,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1558 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2576 Invalid, 0 Unknown, 418 Unchecked, 1.6s Time] [2022-07-21 09:32:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-07-21 09:32:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 535. [2022-07-21 09:32:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 391 states have (on average 1.1304347826086956) internal successors, (442), 404 states have internal predecessors, (442), 94 states have call successors, (94), 32 states have call predecessors, (94), 49 states have return successors, (155), 98 states have call predecessors, (155), 93 states have call successors, (155) [2022-07-21 09:32:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 691 transitions. [2022-07-21 09:32:52,076 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 691 transitions. Word has length 98 [2022-07-21 09:32:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:52,076 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 691 transitions. [2022-07-21 09:32:52,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 22 states have internal predecessors, (137), 7 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-21 09:32:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 691 transitions. [2022-07-21 09:32:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 09:32:52,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:52,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:52,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:32:52,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:32:52,295 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash 204523267, now seen corresponding path program 1 times [2022-07-21 09:32:52,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:52,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063247437] [2022-07-21 09:32:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:52,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 09:32:52,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063247437] [2022-07-21 09:32:52,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063247437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:52,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:52,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 09:32:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983182238] [2022-07-21 09:32:52,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:32:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:32:52,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:32:52,782 INFO L87 Difference]: Start difference. First operand 535 states and 691 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 09:32:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:54,025 INFO L93 Difference]: Finished difference Result 565 states and 729 transitions. [2022-07-21 09:32:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 09:32:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 98 [2022-07-21 09:32:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:54,027 INFO L225 Difference]: With dead ends: 565 [2022-07-21 09:32:54,027 INFO L226 Difference]: Without dead ends: 563 [2022-07-21 09:32:54,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:32:54,028 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 210 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:54,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1139 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 09:32:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-21 09:32:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 539. [2022-07-21 09:32:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 394 states have (on average 1.1294416243654823) internal successors, (445), 407 states have internal predecessors, (445), 94 states have call successors, (94), 33 states have call predecessors, (94), 50 states have return successors, (155), 98 states have call predecessors, (155), 93 states have call successors, (155) [2022-07-21 09:32:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 694 transitions. [2022-07-21 09:32:54,067 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 694 transitions. Word has length 98 [2022-07-21 09:32:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:54,068 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 694 transitions. [2022-07-21 09:32:54,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 13 states have internal predecessors, (61), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 09:32:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 694 transitions. [2022-07-21 09:32:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-21 09:32:54,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:54,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:54,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-21 09:32:54,069 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash 175619793, now seen corresponding path program 1 times [2022-07-21 09:32:54,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:54,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947666834] [2022-07-21 09:32:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:32:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:32:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 09:32:54,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947666834] [2022-07-21 09:32:54,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947666834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:54,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:54,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 09:32:54,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875413638] [2022-07-21 09:32:54,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:54,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:32:54,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:32:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-21 09:32:54,408 INFO L87 Difference]: Start difference. First operand 539 states and 694 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:55,441 INFO L93 Difference]: Finished difference Result 703 states and 884 transitions. [2022-07-21 09:32:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:32:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 102 [2022-07-21 09:32:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:55,444 INFO L225 Difference]: With dead ends: 703 [2022-07-21 09:32:55,444 INFO L226 Difference]: Without dead ends: 557 [2022-07-21 09:32:55,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:32:55,445 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 277 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:55,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 706 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 09:32:55,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-07-21 09:32:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 534. [2022-07-21 09:32:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 389 states have (on average 1.1285347043701799) internal successors, (439), 401 states have internal predecessors, (439), 95 states have call successors, (95), 33 states have call predecessors, (95), 49 states have return successors, (151), 99 states have call predecessors, (151), 93 states have call successors, (151) [2022-07-21 09:32:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 685 transitions. [2022-07-21 09:32:55,485 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 685 transitions. Word has length 102 [2022-07-21 09:32:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:55,485 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 685 transitions. [2022-07-21 09:32:55,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 685 transitions. [2022-07-21 09:32:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-21 09:32:55,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:55,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-21 09:32:55,487 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2142703970, now seen corresponding path program 1 times [2022-07-21 09:32:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:55,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134437539] [2022-07-21 09:32:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:55,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:55,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:55,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:55,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:55,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:32:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:32:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 09:32:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:56,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134437539] [2022-07-21 09:32:56,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134437539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:56,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:56,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:32:56,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801905818] [2022-07-21 09:32:56,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:56,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:32:56,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:32:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:32:56,088 INFO L87 Difference]: Start difference. First operand 534 states and 685 transitions. Second operand has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:56,963 INFO L93 Difference]: Finished difference Result 566 states and 734 transitions. [2022-07-21 09:32:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:32:56,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 108 [2022-07-21 09:32:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:56,965 INFO L225 Difference]: With dead ends: 566 [2022-07-21 09:32:56,965 INFO L226 Difference]: Without dead ends: 564 [2022-07-21 09:32:56,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:32:56,966 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 158 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:56,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 642 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 09:32:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-21 09:32:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 538. [2022-07-21 09:32:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 392 states have (on average 1.1275510204081634) internal successors, (442), 404 states have internal predecessors, (442), 95 states have call successors, (95), 34 states have call predecessors, (95), 50 states have return successors, (151), 99 states have call predecessors, (151), 93 states have call successors, (151) [2022-07-21 09:32:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 688 transitions. [2022-07-21 09:32:57,010 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 688 transitions. Word has length 108 [2022-07-21 09:32:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:57,010 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 688 transitions. [2022-07-21 09:32:57,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 09:32:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 688 transitions. [2022-07-21 09:32:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 09:32:57,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:57,012 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:57,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-21 09:32:57,012 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1928597217, now seen corresponding path program 1 times [2022-07-21 09:32:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:57,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074507161] [2022-07-21 09:32:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 09:32:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 09:32:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-21 09:32:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:32:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 09:32:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:32:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 09:32:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 09:32:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-21 09:32:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-21 09:32:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-21 09:32:57,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:57,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074507161] [2022-07-21 09:32:57,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074507161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:57,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:57,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:32:57,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986925560] [2022-07-21 09:32:57,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:57,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:32:57,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:32:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:32:57,160 INFO L87 Difference]: Start difference. First operand 538 states and 688 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-21 09:32:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:57,552 INFO L93 Difference]: Finished difference Result 570 states and 741 transitions. [2022-07-21 09:32:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:32:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2022-07-21 09:32:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:57,554 INFO L225 Difference]: With dead ends: 570 [2022-07-21 09:32:57,554 INFO L226 Difference]: Without dead ends: 397 [2022-07-21 09:32:57,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:32:57,555 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 187 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:57,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 333 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:32:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-21 09:32:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 370. [2022-07-21 09:32:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 269 states have (on average 1.1226765799256506) internal successors, (302), 278 states have internal predecessors, (302), 67 states have call successors, (67), 22 states have call predecessors, (67), 33 states have return successors, (105), 69 states have call predecessors, (105), 63 states have call successors, (105) [2022-07-21 09:32:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 474 transitions. [2022-07-21 09:32:57,586 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 474 transitions. Word has length 116 [2022-07-21 09:32:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:57,586 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 474 transitions. [2022-07-21 09:32:57,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-21 09:32:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 474 transitions. [2022-07-21 09:32:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 09:32:57,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:57,587 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 09:32:57,588 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1800394554, now seen corresponding path program 1 times [2022-07-21 09:32:57,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:57,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071594033] [2022-07-21 09:32:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:57,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:57,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:32:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:32:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:32:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 09:32:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-07-21 09:32:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-21 09:32:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-21 09:32:58,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071594033] [2022-07-21 09:32:58,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071594033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:58,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:58,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-21 09:32:58,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780919138] [2022-07-21 09:32:58,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:58,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:32:58,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:58,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:32:58,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:32:58,033 INFO L87 Difference]: Start difference. First operand 370 states and 474 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 12 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 09:32:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:58,977 INFO L93 Difference]: Finished difference Result 378 states and 485 transitions. [2022-07-21 09:32:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 09:32:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 12 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 120 [2022-07-21 09:32:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:58,979 INFO L225 Difference]: With dead ends: 378 [2022-07-21 09:32:58,979 INFO L226 Difference]: Without dead ends: 345 [2022-07-21 09:32:58,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-07-21 09:32:58,980 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 133 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:58,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 666 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 09:32:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-21 09:32:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 328. [2022-07-21 09:32:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 237 states have (on average 1.1265822784810127) internal successors, (267), 244 states have internal predecessors, (267), 60 states have call successors, (60), 21 states have call predecessors, (60), 30 states have return successors, (97), 62 states have call predecessors, (97), 57 states have call successors, (97) [2022-07-21 09:32:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 424 transitions. [2022-07-21 09:32:59,006 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 424 transitions. Word has length 120 [2022-07-21 09:32:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:59,006 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 424 transitions. [2022-07-21 09:32:59,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 12 states have internal predecessors, (55), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 09:32:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 424 transitions. [2022-07-21 09:32:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-21 09:32:59,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:59,008 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-21 09:32:59,008 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2129347606, now seen corresponding path program 1 times [2022-07-21 09:32:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147897841] [2022-07-21 09:32:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:32:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:32:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:32:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-21 09:32:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-21 09:32:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147897841] [2022-07-21 09:32:59,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147897841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:59,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:59,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:32:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060924579] [2022-07-21 09:32:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:59,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:32:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:32:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:32:59,187 INFO L87 Difference]: Start difference. First operand 328 states and 424 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:32:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:32:59,633 INFO L93 Difference]: Finished difference Result 461 states and 618 transitions. [2022-07-21 09:32:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:32:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 121 [2022-07-21 09:32:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:32:59,635 INFO L225 Difference]: With dead ends: 461 [2022-07-21 09:32:59,635 INFO L226 Difference]: Without dead ends: 358 [2022-07-21 09:32:59,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:32:59,637 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 101 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:32:59,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 466 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:32:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-21 09:32:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 334. [2022-07-21 09:32:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 242 states have (on average 1.1239669421487604) internal successors, (272), 248 states have internal predecessors, (272), 60 states have call successors, (60), 21 states have call predecessors, (60), 31 states have return successors, (99), 64 states have call predecessors, (99), 57 states have call successors, (99) [2022-07-21 09:32:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 431 transitions. [2022-07-21 09:32:59,664 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 431 transitions. Word has length 121 [2022-07-21 09:32:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:32:59,664 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 431 transitions. [2022-07-21 09:32:59,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 09:32:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 431 transitions. [2022-07-21 09:32:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-21 09:32:59,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:32:59,666 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:32:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-21 09:32:59,666 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:32:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:32:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 762400777, now seen corresponding path program 1 times [2022-07-21 09:32:59,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:32:59,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969473879] [2022-07-21 09:32:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:32:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:32:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:32:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:32:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:32:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:32:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:32:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:32:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:32:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:32:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:32:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:32:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:32:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:32:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:32:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:32:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-21 09:32:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:32:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969473879] [2022-07-21 09:32:59,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969473879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:32:59,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:32:59,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 09:32:59,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146831858] [2022-07-21 09:32:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:32:59,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:32:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:32:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:32:59,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:32:59,835 INFO L87 Difference]: Start difference. First operand 334 states and 431 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-21 09:33:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:00,290 INFO L93 Difference]: Finished difference Result 435 states and 568 transitions. [2022-07-21 09:33:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:33:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 127 [2022-07-21 09:33:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:00,292 INFO L225 Difference]: With dead ends: 435 [2022-07-21 09:33:00,292 INFO L226 Difference]: Without dead ends: 343 [2022-07-21 09:33:00,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:33:00,293 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 252 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:00,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 480 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:33:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-21 09:33:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 326. [2022-07-21 09:33:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 236 states have (on average 1.1144067796610169) internal successors, (263), 243 states have internal predecessors, (263), 58 states have call successors, (58), 21 states have call predecessors, (58), 31 states have return successors, (97), 61 states have call predecessors, (97), 55 states have call successors, (97) [2022-07-21 09:33:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 418 transitions. [2022-07-21 09:33:00,320 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 418 transitions. Word has length 127 [2022-07-21 09:33:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:00,321 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 418 transitions. [2022-07-21 09:33:00,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-21 09:33:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 418 transitions. [2022-07-21 09:33:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-21 09:33:00,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:00,322 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:00,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-21 09:33:00,322 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash -258129269, now seen corresponding path program 1 times [2022-07-21 09:33:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:00,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161594499] [2022-07-21 09:33:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:00,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:33:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:33:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-21 09:33:00,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:00,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161594499] [2022-07-21 09:33:00,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161594499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:00,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:00,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 09:33:00,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163895776] [2022-07-21 09:33:00,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:00,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:33:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:33:00,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:33:00,521 INFO L87 Difference]: Start difference. First operand 326 states and 418 transitions. Second operand has 11 states, 10 states have (on average 6.8) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:33:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:01,160 INFO L93 Difference]: Finished difference Result 353 states and 459 transitions. [2022-07-21 09:33:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 09:33:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 127 [2022-07-21 09:33:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:01,162 INFO L225 Difference]: With dead ends: 353 [2022-07-21 09:33:01,162 INFO L226 Difference]: Without dead ends: 349 [2022-07-21 09:33:01,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:33:01,163 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 286 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:01,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 609 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:33:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-21 09:33:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 333. [2022-07-21 09:33:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 239 states have (on average 1.112970711297071) internal successors, (266), 246 states have internal predecessors, (266), 61 states have call successors, (61), 22 states have call predecessors, (61), 32 states have return successors, (99), 64 states have call predecessors, (99), 58 states have call successors, (99) [2022-07-21 09:33:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 426 transitions. [2022-07-21 09:33:01,191 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 426 transitions. Word has length 127 [2022-07-21 09:33:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:01,192 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 426 transitions. [2022-07-21 09:33:01,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.8) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:33:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 426 transitions. [2022-07-21 09:33:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 09:33:01,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:01,193 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:01,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-21 09:33:01,193 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1955749090, now seen corresponding path program 1 times [2022-07-21 09:33:01,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:01,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133555807] [2022-07-21 09:33:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:01,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-21 09:33:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-21 09:33:01,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133555807] [2022-07-21 09:33:01,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133555807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:01,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:01,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:33:01,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327396678] [2022-07-21 09:33:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:01,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:33:01,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:33:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:33:01,373 INFO L87 Difference]: Start difference. First operand 333 states and 426 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-21 09:33:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:01,771 INFO L93 Difference]: Finished difference Result 460 states and 599 transitions. [2022-07-21 09:33:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:33:01,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 128 [2022-07-21 09:33:01,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:01,773 INFO L225 Difference]: With dead ends: 460 [2022-07-21 09:33:01,773 INFO L226 Difference]: Without dead ends: 351 [2022-07-21 09:33:01,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:33:01,773 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 173 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:01,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 550 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 09:33:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-21 09:33:01,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 333. [2022-07-21 09:33:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 239 states have (on average 1.112970711297071) internal successors, (266), 246 states have internal predecessors, (266), 61 states have call successors, (61), 22 states have call predecessors, (61), 32 states have return successors, (99), 64 states have call predecessors, (99), 58 states have call successors, (99) [2022-07-21 09:33:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 426 transitions. [2022-07-21 09:33:01,801 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 426 transitions. Word has length 128 [2022-07-21 09:33:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:01,801 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 426 transitions. [2022-07-21 09:33:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-21 09:33:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 426 transitions. [2022-07-21 09:33:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-21 09:33:01,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:01,803 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:01,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-21 09:33:01,803 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1110255069, now seen corresponding path program 1 times [2022-07-21 09:33:01,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:01,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762313832] [2022-07-21 09:33:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:01,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-21 09:33:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-21 09:33:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762313832] [2022-07-21 09:33:01,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762313832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:01,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:01,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:33:01,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679906154] [2022-07-21 09:33:01,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:33:01,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:33:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:33:01,977 INFO L87 Difference]: Start difference. First operand 333 states and 426 transitions. Second operand has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:33:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:02,440 INFO L93 Difference]: Finished difference Result 351 states and 450 transitions. [2022-07-21 09:33:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:33:02,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 129 [2022-07-21 09:33:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:02,442 INFO L225 Difference]: With dead ends: 351 [2022-07-21 09:33:02,442 INFO L226 Difference]: Without dead ends: 349 [2022-07-21 09:33:02,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:33:02,443 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 185 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:02,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 725 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:33:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-21 09:33:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 340. [2022-07-21 09:33:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 242 states have (on average 1.1115702479338843) internal successors, (269), 249 states have internal predecessors, (269), 64 states have call successors, (64), 23 states have call predecessors, (64), 33 states have return successors, (102), 67 states have call predecessors, (102), 61 states have call successors, (102) [2022-07-21 09:33:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 435 transitions. [2022-07-21 09:33:02,472 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 435 transitions. Word has length 129 [2022-07-21 09:33:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:02,473 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 435 transitions. [2022-07-21 09:33:02,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.444444444444445) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:33:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 435 transitions. [2022-07-21 09:33:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 09:33:02,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:02,474 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-21 09:33:02,475 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1642854161, now seen corresponding path program 1 times [2022-07-21 09:33:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:02,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488283572] [2022-07-21 09:33:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:33:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:33:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 09:33:02,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:02,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488283572] [2022-07-21 09:33:02,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488283572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:02,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960876645] [2022-07-21 09:33:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:02,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:02,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:02,812 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:02,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:33:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:03,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 2694 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 09:33:03,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 09:33:03,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:03,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-21 09:33:03,926 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 09:33:03,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-07-21 09:33:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:33:03,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960876645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:33:03,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:33:03,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 27 [2022-07-21 09:33:03,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974852285] [2022-07-21 09:33:03,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 09:33:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 09:33:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-07-21 09:33:03,954 INFO L87 Difference]: Start difference. First operand 340 states and 435 transitions. Second operand has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 22 states have internal predecessors, (156), 7 states have call successors, (31), 8 states have call predecessors, (31), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) [2022-07-21 09:33:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:06,236 INFO L93 Difference]: Finished difference Result 631 states and 799 transitions. [2022-07-21 09:33:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 09:33:06,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 22 states have internal predecessors, (156), 7 states have call successors, (31), 8 states have call predecessors, (31), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) Word has length 131 [2022-07-21 09:33:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:06,238 INFO L225 Difference]: With dead ends: 631 [2022-07-21 09:33:06,238 INFO L226 Difference]: Without dead ends: 381 [2022-07-21 09:33:06,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 280 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=1867, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 09:33:06,239 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 278 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:06,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1179 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2735 Invalid, 0 Unknown, 574 Unchecked, 1.6s Time] [2022-07-21 09:33:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-21 09:33:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 346. [2022-07-21 09:33:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 249 states have (on average 1.104417670682731) internal successors, (275), 255 states have internal predecessors, (275), 63 states have call successors, (63), 24 states have call predecessors, (63), 33 states have return successors, (100), 66 states have call predecessors, (100), 60 states have call successors, (100) [2022-07-21 09:33:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 438 transitions. [2022-07-21 09:33:06,270 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 438 transitions. Word has length 131 [2022-07-21 09:33:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:06,270 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 438 transitions. [2022-07-21 09:33:06,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 22 states have internal predecessors, (156), 7 states have call successors, (31), 8 states have call predecessors, (31), 6 states have return successors, (25), 5 states have call predecessors, (25), 7 states have call successors, (25) [2022-07-21 09:33:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 438 transitions. [2022-07-21 09:33:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 09:33:06,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:06,272 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:06,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-21 09:33:06,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:06,491 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash 291468943, now seen corresponding path program 1 times [2022-07-21 09:33:06,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:06,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576477424] [2022-07-21 09:33:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:06,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:33:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:33:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-21 09:33:07,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576477424] [2022-07-21 09:33:07,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576477424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149520441] [2022-07-21 09:33:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:07,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:07,113 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:07,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:33:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 09:33:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:07,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:33:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 58 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 09:33:08,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:33:08,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149520441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:33:08,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:33:08,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 10] total 37 [2022-07-21 09:33:08,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007389666] [2022-07-21 09:33:08,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:08,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 09:33:08,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:08,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 09:33:08,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 09:33:08,603 INFO L87 Difference]: Start difference. First operand 346 states and 438 transitions. Second operand has 37 states, 36 states have (on average 5.444444444444445) internal successors, (196), 32 states have internal predecessors, (196), 10 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (37), 8 states have call predecessors, (37), 9 states have call successors, (37) [2022-07-21 09:33:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:10,438 INFO L93 Difference]: Finished difference Result 432 states and 547 transitions. [2022-07-21 09:33:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:33:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.444444444444445) internal successors, (196), 32 states have internal predecessors, (196), 10 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (37), 8 states have call predecessors, (37), 9 states have call successors, (37) Word has length 131 [2022-07-21 09:33:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:10,440 INFO L225 Difference]: With dead ends: 432 [2022-07-21 09:33:10,440 INFO L226 Difference]: Without dead ends: 407 [2022-07-21 09:33:10,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 267 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 09:33:10,441 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 435 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:10,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1216 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2288 Invalid, 0 Unknown, 491 Unchecked, 1.2s Time] [2022-07-21 09:33:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-21 09:33:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 368. [2022-07-21 09:33:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 265 states have (on average 1.0981132075471698) internal successors, (291), 273 states have internal predecessors, (291), 65 states have call successors, (65), 26 states have call predecessors, (65), 37 states have return successors, (114), 68 states have call predecessors, (114), 62 states have call successors, (114) [2022-07-21 09:33:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 470 transitions. [2022-07-21 09:33:10,475 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 470 transitions. Word has length 131 [2022-07-21 09:33:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:10,475 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 470 transitions. [2022-07-21 09:33:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.444444444444445) internal successors, (196), 32 states have internal predecessors, (196), 10 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (37), 8 states have call predecessors, (37), 9 states have call successors, (37) [2022-07-21 09:33:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 470 transitions. [2022-07-21 09:33:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 09:33:10,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:10,476 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:10,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:10,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:10,697 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1460059221, now seen corresponding path program 1 times [2022-07-21 09:33:10,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:10,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679366538] [2022-07-21 09:33:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:10,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:10,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:33:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:33:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 09:33:11,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679366538] [2022-07-21 09:33:11,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679366538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611534546] [2022-07-21 09:33:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:11,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:11,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:11,073 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:11,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:33:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:11,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2686 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 09:33:11,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 39 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 09:33:12,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:19,296 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 09:33:19,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2022-07-21 09:33:19,461 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-21 09:33:19,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2022-07-21 09:33:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:33:19,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611534546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:33:19,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:33:19,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2022-07-21 09:33:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448612975] [2022-07-21 09:33:19,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:19,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 09:33:19,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 09:33:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1633, Unknown=2, NotChecked=0, Total=1806 [2022-07-21 09:33:19,542 INFO L87 Difference]: Start difference. First operand 368 states and 470 transitions. Second operand has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-21 09:33:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:24,425 INFO L93 Difference]: Finished difference Result 713 states and 916 transitions. [2022-07-21 09:33:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 09:33:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) Word has length 131 [2022-07-21 09:33:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:24,427 INFO L225 Difference]: With dead ends: 713 [2022-07-21 09:33:24,427 INFO L226 Difference]: Without dead ends: 482 [2022-07-21 09:33:24,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 255 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=794, Invalid=5210, Unknown=2, NotChecked=0, Total=6006 [2022-07-21 09:33:24,429 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 452 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 4353 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 5561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1012 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:24,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 2376 Invalid, 5561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4353 Invalid, 0 Unknown, 1012 Unchecked, 3.0s Time] [2022-07-21 09:33:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-21 09:33:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 400. [2022-07-21 09:33:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 295 states have (on average 1.0949152542372882) internal successors, (323), 301 states have internal predecessors, (323), 64 states have call successors, (64), 30 states have call predecessors, (64), 40 states have return successors, (107), 68 states have call predecessors, (107), 61 states have call successors, (107) [2022-07-21 09:33:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 494 transitions. [2022-07-21 09:33:24,466 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 494 transitions. Word has length 131 [2022-07-21 09:33:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:24,466 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 494 transitions. [2022-07-21 09:33:24,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.744186046511628) internal successors, (204), 37 states have internal predecessors, (204), 9 states have call successors, (38), 11 states have call predecessors, (38), 9 states have return successors, (34), 9 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-21 09:33:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 494 transitions. [2022-07-21 09:33:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 09:33:24,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:24,467 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:24,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-21 09:33:24,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:24,683 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2079477013, now seen corresponding path program 1 times [2022-07-21 09:33:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:24,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156084169] [2022-07-21 09:33:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:24,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:24,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:24,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:24,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:24,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:33:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:33:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:33:25,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156084169] [2022-07-21 09:33:25,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156084169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102514127] [2022-07-21 09:33:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:25,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:25,324 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:25,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:33:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 2696 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 09:33:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:25,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:33:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 09:33:26,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 09:33:27,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102514127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:33:27,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:33:27,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 14] total 40 [2022-07-21 09:33:27,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94738464] [2022-07-21 09:33:27,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:27,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 09:33:27,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:27,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 09:33:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 09:33:27,845 INFO L87 Difference]: Start difference. First operand 400 states and 494 transitions. Second operand has 40 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 35 states have internal predecessors, (196), 9 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-21 09:33:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:31,085 INFO L93 Difference]: Finished difference Result 471 states and 573 transitions. [2022-07-21 09:33:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 09:33:31,085 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 35 states have internal predecessors, (196), 9 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) Word has length 131 [2022-07-21 09:33:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:31,087 INFO L225 Difference]: With dead ends: 471 [2022-07-21 09:33:31,087 INFO L226 Difference]: Without dead ends: 459 [2022-07-21 09:33:31,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 258 SyntacticMatches, 16 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=745, Invalid=3677, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 09:33:31,088 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 395 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:31,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1066 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2615 Invalid, 0 Unknown, 562 Unchecked, 1.7s Time] [2022-07-21 09:33:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-21 09:33:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 430. [2022-07-21 09:33:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 322 states have (on average 1.093167701863354) internal successors, (352), 328 states have internal predecessors, (352), 64 states have call successors, (64), 33 states have call predecessors, (64), 43 states have return successors, (105), 68 states have call predecessors, (105), 61 states have call successors, (105) [2022-07-21 09:33:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 521 transitions. [2022-07-21 09:33:31,125 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 521 transitions. Word has length 131 [2022-07-21 09:33:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:31,126 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 521 transitions. [2022-07-21 09:33:31,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 35 states have internal predecessors, (196), 9 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-21 09:33:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 521 transitions. [2022-07-21 09:33:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 09:33:31,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:31,127 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:31,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:31,328 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 367115802, now seen corresponding path program 1 times [2022-07-21 09:33:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:31,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220673289] [2022-07-21 09:33:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:33:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:33:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-21 09:33:31,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:31,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220673289] [2022-07-21 09:33:31,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220673289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:31,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:31,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 09:33:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877436253] [2022-07-21 09:33:31,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:31,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:33:31,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:31,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:33:31,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:33:31,545 INFO L87 Difference]: Start difference. First operand 430 states and 521 transitions. Second operand has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:33:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:32,337 INFO L93 Difference]: Finished difference Result 483 states and 612 transitions. [2022-07-21 09:33:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:33:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 133 [2022-07-21 09:33:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:32,339 INFO L225 Difference]: With dead ends: 483 [2022-07-21 09:33:32,339 INFO L226 Difference]: Without dead ends: 443 [2022-07-21 09:33:32,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-07-21 09:33:32,340 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 279 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:32,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 788 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:33:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-21 09:33:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 372. [2022-07-21 09:33:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 272 states have (on average 1.0919117647058822) internal successors, (297), 277 states have internal predecessors, (297), 62 states have call successors, (62), 30 states have call predecessors, (62), 37 states have return successors, (96), 64 states have call predecessors, (96), 59 states have call successors, (96) [2022-07-21 09:33:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 455 transitions. [2022-07-21 09:33:32,387 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 455 transitions. Word has length 133 [2022-07-21 09:33:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:32,387 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 455 transitions. [2022-07-21 09:33:32,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 8 states have internal predecessors, (67), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:33:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 455 transitions. [2022-07-21 09:33:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 09:33:32,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:32,389 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:32,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-21 09:33:32,389 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2135163427, now seen corresponding path program 1 times [2022-07-21 09:33:32,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:32,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125962269] [2022-07-21 09:33:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-21 09:33:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-21 09:33:32,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125962269] [2022-07-21 09:33:32,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125962269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:32,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:32,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:33:32,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412898939] [2022-07-21 09:33:32,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:33:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:33:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:33:32,580 INFO L87 Difference]: Start difference. First operand 372 states and 455 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-21 09:33:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:32,903 INFO L93 Difference]: Finished difference Result 539 states and 667 transitions. [2022-07-21 09:33:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:33:32,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 133 [2022-07-21 09:33:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:32,904 INFO L225 Difference]: With dead ends: 539 [2022-07-21 09:33:32,904 INFO L226 Difference]: Without dead ends: 362 [2022-07-21 09:33:32,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:33:32,905 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 175 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:32,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 377 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:33:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-21 09:33:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 356. [2022-07-21 09:33:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 262 states have (on average 1.0763358778625953) internal successors, (282), 267 states have internal predecessors, (282), 57 states have call successors, (57), 29 states have call predecessors, (57), 36 states have return successors, (91), 59 states have call predecessors, (91), 54 states have call successors, (91) [2022-07-21 09:33:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 430 transitions. [2022-07-21 09:33:32,941 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 430 transitions. Word has length 133 [2022-07-21 09:33:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:32,941 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 430 transitions. [2022-07-21 09:33:32,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 4 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-21 09:33:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 430 transitions. [2022-07-21 09:33:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 09:33:32,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:32,942 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:32,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-21 09:33:32,942 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash -671775652, now seen corresponding path program 1 times [2022-07-21 09:33:32,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501700078] [2022-07-21 09:33:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:32,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 09:33:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 09:33:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-21 09:33:33,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:33,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501700078] [2022-07-21 09:33:33,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501700078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:33,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:33,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:33:33,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738648577] [2022-07-21 09:33:33,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:33,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:33:33,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:33:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:33:33,510 INFO L87 Difference]: Start difference. First operand 356 states and 430 transitions. Second operand has 21 states, 20 states have (on average 3.85) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-21 09:33:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:34,871 INFO L93 Difference]: Finished difference Result 370 states and 446 transitions. [2022-07-21 09:33:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:33:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 133 [2022-07-21 09:33:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:34,873 INFO L225 Difference]: With dead ends: 370 [2022-07-21 09:33:34,873 INFO L226 Difference]: Without dead ends: 349 [2022-07-21 09:33:34,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 09:33:34,873 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 313 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:34,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 716 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 09:33:34,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-21 09:33:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 341. [2022-07-21 09:33:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 251 states have (on average 1.0756972111553784) internal successors, (270), 256 states have internal predecessors, (270), 55 states have call successors, (55), 27 states have call predecessors, (55), 34 states have return successors, (87), 57 states have call predecessors, (87), 52 states have call successors, (87) [2022-07-21 09:33:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 412 transitions. [2022-07-21 09:33:34,920 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 412 transitions. Word has length 133 [2022-07-21 09:33:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:34,920 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 412 transitions. [2022-07-21 09:33:34,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-21 09:33:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 412 transitions. [2022-07-21 09:33:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-21 09:33:34,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:34,921 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:34,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-21 09:33:34,921 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:34,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:34,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1709701502, now seen corresponding path program 1 times [2022-07-21 09:33:34,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:34,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45034834] [2022-07-21 09:33:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:34,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:33:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-21 09:33:35,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45034834] [2022-07-21 09:33:35,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45034834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:35,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:33:35,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 09:33:35,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289940534] [2022-07-21 09:33:35,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:35,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 09:33:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 09:33:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-07-21 09:33:35,255 INFO L87 Difference]: Start difference. First operand 341 states and 412 transitions. Second operand has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 09:33:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:35,911 INFO L93 Difference]: Finished difference Result 488 states and 597 transitions. [2022-07-21 09:33:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:33:35,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 134 [2022-07-21 09:33:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:35,913 INFO L225 Difference]: With dead ends: 488 [2022-07-21 09:33:35,913 INFO L226 Difference]: Without dead ends: 333 [2022-07-21 09:33:35,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-07-21 09:33:35,914 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 219 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:35,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 656 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 09:33:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-21 09:33:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-07-21 09:33:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 244 states have (on average 1.0655737704918034) internal successors, (260), 250 states have internal predecessors, (260), 55 states have call successors, (55), 27 states have call predecessors, (55), 33 states have return successors, (85), 55 states have call predecessors, (85), 52 states have call successors, (85) [2022-07-21 09:33:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 400 transitions. [2022-07-21 09:33:35,946 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 400 transitions. Word has length 134 [2022-07-21 09:33:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:35,946 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 400 transitions. [2022-07-21 09:33:35,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.714285714285714) internal successors, (66), 11 states have internal predecessors, (66), 8 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 09:33:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 400 transitions. [2022-07-21 09:33:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-21 09:33:35,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:35,947 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:35,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-21 09:33:35,948 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1572439748, now seen corresponding path program 1 times [2022-07-21 09:33:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465605538] [2022-07-21 09:33:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:35,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:33:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 09:33:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465605538] [2022-07-21 09:33:36,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465605538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825273267] [2022-07-21 09:33:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:36,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:36,608 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:36,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 09:33:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 09:33:37,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:37,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 09:33:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 09:33:41,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:33:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825273267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:33:41,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:33:41,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 28 [2022-07-21 09:33:41,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339646025] [2022-07-21 09:33:41,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:33:41,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:33:41,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:33:41,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=672, Unknown=2, NotChecked=0, Total=756 [2022-07-21 09:33:41,466 INFO L87 Difference]: Start difference. First operand 333 states and 400 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-21 09:33:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:41,587 INFO L93 Difference]: Finished difference Result 444 states and 523 transitions. [2022-07-21 09:33:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:33:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 134 [2022-07-21 09:33:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:41,589 INFO L225 Difference]: With dead ends: 444 [2022-07-21 09:33:41,589 INFO L226 Difference]: Without dead ends: 330 [2022-07-21 09:33:41,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=99, Invalid=829, Unknown=2, NotChecked=0, Total=930 [2022-07-21 09:33:41,590 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 42 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:41,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 582 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-07-21 09:33:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-21 09:33:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2022-07-21 09:33:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 241 states have (on average 1.066390041493776) internal successors, (257), 247 states have internal predecessors, (257), 53 states have call successors, (53), 26 states have call predecessors, (53), 32 states have return successors, (79), 53 states have call predecessors, (79), 50 states have call successors, (79) [2022-07-21 09:33:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 389 transitions. [2022-07-21 09:33:41,632 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 389 transitions. Word has length 134 [2022-07-21 09:33:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:41,632 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 389 transitions. [2022-07-21 09:33:41,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-21 09:33:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 389 transitions. [2022-07-21 09:33:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-21 09:33:41,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:41,633 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:41,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 09:33:41,839 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 845092170, now seen corresponding path program 1 times [2022-07-21 09:33:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457402349] [2022-07-21 09:33:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:33:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-21 09:33:42,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:42,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457402349] [2022-07-21 09:33:42,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457402349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:42,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808008351] [2022-07-21 09:33:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:42,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:42,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:42,409 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:42,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 09:33:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:42,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 09:33:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:42,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:33:44,180 INFO L390 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 37 treesize of output 21 [2022-07-21 09:33:44,194 WARN L855 $PredicateComparison]: unable to prove that (exists ((|can_fail_realloc_#Ultimate.C_realloc_#res#1.base| Int)) (and (< |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1935 (Array Int Int))) (= (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| v_ArrVal_1935) |c_#memory_int|)))) is different from true [2022-07-21 09:33:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:44,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-07-21 09:33:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:44,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:44,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:44,285 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:33:44,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-07-21 09:33:44,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:33:44,352 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:33:44,352 INFO L390 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 1 case distinctions, treesize of input 58 treesize of output 41 [2022-07-21 09:33:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 09:33:44,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:33:45,385 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1942 (Array Int Int)) (v_ArrVal_1937 Int) (|v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_8| Int)) (or (<= (mod (select (select (let ((.cse0 (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_8| v_ArrVal_1942))) (store .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base| (store (select .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base|) |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.offset| v_ArrVal_1937))) |c_aws_byte_buf_reserve_~buffer#1.base|) |c_aws_byte_buf_reserve_~buffer#1.offset|) 18446744073709551616) (mod |c_aws_byte_buf_reserve_~requested_capacity#1| 18446744073709551616)) (not (< |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_8| |c_#StackHeapBarrier|)))) is different from false [2022-07-21 09:33:45,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808008351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:45,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:33:45,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29] total 42 [2022-07-21 09:33:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590888174] [2022-07-21 09:33:45,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:33:45,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 09:33:45,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:33:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 09:33:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2058, Unknown=2, NotChecked=186, Total=2450 [2022-07-21 09:33:45,389 INFO L87 Difference]: Start difference. First operand 327 states and 389 transitions. Second operand has 42 states, 40 states have (on average 3.725) internal successors, (149), 38 states have internal predecessors, (149), 12 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-21 09:33:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:33:47,845 INFO L93 Difference]: Finished difference Result 479 states and 575 transitions. [2022-07-21 09:33:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:33:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 3.725) internal successors, (149), 38 states have internal predecessors, (149), 12 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) Word has length 134 [2022-07-21 09:33:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:33:47,847 INFO L225 Difference]: With dead ends: 479 [2022-07-21 09:33:47,847 INFO L226 Difference]: Without dead ends: 378 [2022-07-21 09:33:47,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=564, Invalid=4956, Unknown=38, NotChecked=294, Total=5852 [2022-07-21 09:33:47,848 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 361 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1046 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:33:47,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1326 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1818 Invalid, 0 Unknown, 1046 Unchecked, 1.2s Time] [2022-07-21 09:33:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-21 09:33:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2022-07-21 09:33:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 242 states have (on average 1.0661157024793388) internal successors, (258), 247 states have internal predecessors, (258), 51 states have call successors, (51), 26 states have call predecessors, (51), 31 states have return successors, (67), 51 states have call predecessors, (67), 48 states have call successors, (67) [2022-07-21 09:33:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 376 transitions. [2022-07-21 09:33:47,881 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 376 transitions. Word has length 134 [2022-07-21 09:33:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:33:47,881 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 376 transitions. [2022-07-21 09:33:47,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 3.725) internal successors, (149), 38 states have internal predecessors, (149), 12 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-21 09:33:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 376 transitions. [2022-07-21 09:33:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-21 09:33:47,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:33:47,882 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:33:47,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 09:33:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-21 09:33:48,083 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:33:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:33:48,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1553937270, now seen corresponding path program 1 times [2022-07-21 09:33:48,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:33:48,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763226679] [2022-07-21 09:33:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:33:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:33:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:33:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:33:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:33:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:33:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:33:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:33:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:33:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:33:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:48,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:33:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:49,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:33:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:33:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:49,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:33:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 09:33:49,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:33:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763226679] [2022-07-21 09:33:49,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763226679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:33:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152321921] [2022-07-21 09:33:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:33:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:33:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:33:49,345 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:33:49,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 09:33:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:33:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-21 09:33:49,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:33:49,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:34:01,471 INFO L390 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 44 treesize of output 24 [2022-07-21 09:34:01,513 WARN L855 $PredicateComparison]: unable to prove that (exists ((|can_fail_realloc_#Ultimate.C_realloc_#res#1.base| Int)) (and (exists ((v_ArrVal_2065 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| v_ArrVal_2065))) (< |can_fail_realloc_#Ultimate.C_realloc_#res#1.base| |c_#StackHeapBarrier|))) is different from true [2022-07-21 09:34:01,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:34:01,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2022-07-21 09:34:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:34:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:34:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:34:01,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:34:01,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 52 [2022-07-21 09:34:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:34:01,702 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:34:01,702 INFO L390 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 1 case distinctions, treesize of input 67 treesize of output 44 [2022-07-21 09:34:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 09:34:02,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:34:08,270 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2072 (Array Int Int)) (v_ArrVal_2066 Int) (|v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| Int)) (or (<= (mod (select (select (let ((.cse0 (store |c_#memory_int| |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| v_ArrVal_2072))) (store .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base| (store (select .cse0 |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.base|) |c_aws_byte_buf_reserve_aws_mem_realloc_~ptr#1.offset| v_ArrVal_2066))) |c_aws_byte_buf_reserve_~buffer#1.base|) |c_aws_byte_buf_reserve_~buffer#1.offset|) 18446744073709551616) (mod |c_aws_byte_buf_reserve_~requested_capacity#1| 18446744073709551616)) (not (< |v_can_fail_realloc_#Ultimate.C_realloc_#res#1.base_12| |c_#StackHeapBarrier|)))) is different from false [2022-07-21 09:34:08,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152321921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:08,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:34:08,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 46 [2022-07-21 09:34:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129075039] [2022-07-21 09:34:08,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:34:08,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:34:08,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:34:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2178, Unknown=7, NotChecked=190, Total=2550 [2022-07-21 09:34:08,273 INFO L87 Difference]: Start difference. First operand 325 states and 376 transitions. Second operand has 46 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 42 states have internal predecessors, (162), 13 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-07-21 09:34:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:14,126 INFO L93 Difference]: Finished difference Result 466 states and 531 transitions. [2022-07-21 09:34:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 09:34:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 42 states have internal predecessors, (162), 13 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 134 [2022-07-21 09:34:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:14,128 INFO L225 Difference]: With dead ends: 466 [2022-07-21 09:34:14,128 INFO L226 Difference]: Without dead ends: 306 [2022-07-21 09:34:14,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 155 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=738, Invalid=6573, Unknown=7, NotChecked=338, Total=7656 [2022-07-21 09:34:14,139 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 294 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1287 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:14,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1073 Invalid, 4429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3021 Invalid, 0 Unknown, 1287 Unchecked, 2.5s Time] [2022-07-21 09:34:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-21 09:34:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 286. [2022-07-21 09:34:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 214 states have (on average 1.0654205607476634) internal successors, (228), 218 states have internal predecessors, (228), 44 states have call successors, (44), 23 states have call predecessors, (44), 27 states have return successors, (57), 44 states have call predecessors, (57), 42 states have call successors, (57) [2022-07-21 09:34:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 329 transitions. [2022-07-21 09:34:14,174 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 329 transitions. Word has length 134 [2022-07-21 09:34:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:14,174 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 329 transitions. [2022-07-21 09:34:14,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 3.7674418604651163) internal successors, (162), 42 states have internal predecessors, (162), 13 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2022-07-21 09:34:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 329 transitions. [2022-07-21 09:34:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-21 09:34:14,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:14,175 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:14,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 09:34:14,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:14,376 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 462581892, now seen corresponding path program 1 times [2022-07-21 09:34:14,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994234869] [2022-07-21 09:34:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:34:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:34:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:34:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:34:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:34:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:34:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-21 09:34:14,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994234869] [2022-07-21 09:34:14,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994234869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:14,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:14,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:34:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095164749] [2022-07-21 09:34:14,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:14,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:34:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:34:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:34:14,518 INFO L87 Difference]: Start difference. First operand 286 states and 329 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-21 09:34:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:14,751 INFO L93 Difference]: Finished difference Result 370 states and 430 transitions. [2022-07-21 09:34:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:34:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 134 [2022-07-21 09:34:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:14,753 INFO L225 Difference]: With dead ends: 370 [2022-07-21 09:34:14,753 INFO L226 Difference]: Without dead ends: 286 [2022-07-21 09:34:14,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:34:14,753 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 67 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:14,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 314 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:34:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-07-21 09:34:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-07-21 09:34:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 214 states have (on average 1.0560747663551402) internal successors, (226), 218 states have internal predecessors, (226), 44 states have call successors, (44), 23 states have call predecessors, (44), 27 states have return successors, (57), 44 states have call predecessors, (57), 42 states have call successors, (57) [2022-07-21 09:34:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 327 transitions. [2022-07-21 09:34:14,788 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 327 transitions. Word has length 134 [2022-07-21 09:34:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:14,788 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 327 transitions. [2022-07-21 09:34:14,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-21 09:34:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 327 transitions. [2022-07-21 09:34:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-21 09:34:14,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:14,789 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:14,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-21 09:34:14,789 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash -641305329, now seen corresponding path program 1 times [2022-07-21 09:34:14,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:14,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615995133] [2022-07-21 09:34:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:34:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:34:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:34:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:34:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:34:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:34:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-21 09:34:14,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615995133] [2022-07-21 09:34:14,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615995133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:14,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:14,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 09:34:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580836038] [2022-07-21 09:34:14,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:14,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:34:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:34:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:34:14,995 INFO L87 Difference]: Start difference. First operand 286 states and 327 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:34:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:15,508 INFO L93 Difference]: Finished difference Result 294 states and 335 transitions. [2022-07-21 09:34:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:34:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 136 [2022-07-21 09:34:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:15,509 INFO L225 Difference]: With dead ends: 294 [2022-07-21 09:34:15,509 INFO L226 Difference]: Without dead ends: 292 [2022-07-21 09:34:15,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:34:15,510 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 90 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:15,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 743 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 09:34:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-07-21 09:34:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-07-21 09:34:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 217 states have (on average 1.055299539170507) internal successors, (229), 221 states have internal predecessors, (229), 45 states have call successors, (45), 24 states have call predecessors, (45), 28 states have return successors, (58), 45 states have call predecessors, (58), 43 states have call successors, (58) [2022-07-21 09:34:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-07-21 09:34:15,545 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 136 [2022-07-21 09:34:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:15,546 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-07-21 09:34:15,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-07-21 09:34:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-07-21 09:34:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-21 09:34:15,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:15,547 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-21 09:34:15,547 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 59759249, now seen corresponding path program 1 times [2022-07-21 09:34:15,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:15,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629414800] [2022-07-21 09:34:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:34:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:34:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:34:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:34:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:34:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 09:34:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-21 09:34:16,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:16,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629414800] [2022-07-21 09:34:16,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629414800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:16,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:16,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-21 09:34:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957668132] [2022-07-21 09:34:16,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 09:34:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 09:34:16,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2022-07-21 09:34:16,540 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 27 states, 26 states have (on average 3.0) internal successors, (78), 20 states have internal predecessors, (78), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 09:34:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:18,490 INFO L93 Difference]: Finished difference Result 297 states and 337 transitions. [2022-07-21 09:34:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:34:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.0) internal successors, (78), 20 states have internal predecessors, (78), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) Word has length 136 [2022-07-21 09:34:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:18,491 INFO L225 Difference]: With dead ends: 297 [2022-07-21 09:34:18,491 INFO L226 Difference]: Without dead ends: 295 [2022-07-21 09:34:18,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=1949, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 09:34:18,491 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 202 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:18,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 923 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-21 09:34:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-21 09:34:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-07-21 09:34:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 220 states have (on average 1.0545454545454545) internal successors, (232), 224 states have internal predecessors, (232), 45 states have call successors, (45), 25 states have call predecessors, (45), 29 states have return successors, (58), 45 states have call predecessors, (58), 43 states have call successors, (58) [2022-07-21 09:34:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 335 transitions. [2022-07-21 09:34:18,529 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 335 transitions. Word has length 136 [2022-07-21 09:34:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:18,529 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 335 transitions. [2022-07-21 09:34:18,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.0) internal successors, (78), 20 states have internal predecessors, (78), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 09:34:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 335 transitions. [2022-07-21 09:34:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-21 09:34:18,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:18,530 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-21 09:34:18,531 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:18,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2034696283, now seen corresponding path program 1 times [2022-07-21 09:34:18,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:18,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817101000] [2022-07-21 09:34:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:18,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:34:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:34:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:34:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:34:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:34:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:18,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:19,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-21 09:34:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-21 09:34:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 09:34:19,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:19,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817101000] [2022-07-21 09:34:19,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817101000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:19,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071856450] [2022-07-21 09:34:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:19,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:34:19,123 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:34:19,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 09:34:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 09:34:19,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:34:19,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:34:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 09:34:20,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:34:20,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071856450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:20,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:34:20,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 34 [2022-07-21 09:34:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810378048] [2022-07-21 09:34:20,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 09:34:20,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 09:34:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 09:34:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 09:34:20,544 INFO L87 Difference]: Start difference. First operand 295 states and 335 transitions. Second operand has 34 states, 33 states have (on average 4.787878787878788) internal successors, (158), 29 states have internal predecessors, (158), 12 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-21 09:34:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:22,384 INFO L93 Difference]: Finished difference Result 328 states and 371 transitions. [2022-07-21 09:34:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 09:34:22,385 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.787878787878788) internal successors, (158), 29 states have internal predecessors, (158), 12 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) Word has length 138 [2022-07-21 09:34:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:22,386 INFO L225 Difference]: With dead ends: 328 [2022-07-21 09:34:22,386 INFO L226 Difference]: Without dead ends: 286 [2022-07-21 09:34:22,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 179 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 09:34:22,386 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 336 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:22,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1102 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1910 Invalid, 0 Unknown, 414 Unchecked, 1.0s Time] [2022-07-21 09:34:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-07-21 09:34:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 277. [2022-07-21 09:34:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 207 states have (on average 1.0531400966183575) internal successors, (218), 211 states have internal predecessors, (218), 42 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (54), 42 states have call predecessors, (54), 41 states have call successors, (54) [2022-07-21 09:34:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2022-07-21 09:34:22,419 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 138 [2022-07-21 09:34:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:22,419 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2022-07-21 09:34:22,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.787878787878788) internal successors, (158), 29 states have internal predecessors, (158), 12 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-21 09:34:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2022-07-21 09:34:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-21 09:34:22,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:22,420 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:22,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 09:34:22,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:22,621 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:22,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1610589239, now seen corresponding path program 1 times [2022-07-21 09:34:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:22,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988966024] [2022-07-21 09:34:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-21 09:34:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 09:34:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-21 09:34:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-07-21 09:34:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-21 09:34:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-21 09:34:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-21 09:34:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-21 09:34:22,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988966024] [2022-07-21 09:34:22,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988966024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:22,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:22,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 09:34:22,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635585093] [2022-07-21 09:34:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:22,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:34:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:34:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:34:22,779 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-21 09:34:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:23,081 INFO L93 Difference]: Finished difference Result 343 states and 387 transitions. [2022-07-21 09:34:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:34:23,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 140 [2022-07-21 09:34:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:23,082 INFO L225 Difference]: With dead ends: 343 [2022-07-21 09:34:23,082 INFO L226 Difference]: Without dead ends: 247 [2022-07-21 09:34:23,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:34:23,083 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 174 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:23,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 395 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:34:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-21 09:34:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2022-07-21 09:34:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 185 states have (on average 1.0486486486486486) internal successors, (194), 187 states have internal predecessors, (194), 34 states have call successors, (34), 21 states have call predecessors, (34), 22 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2022-07-21 09:34:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 266 transitions. [2022-07-21 09:34:23,108 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 266 transitions. Word has length 140 [2022-07-21 09:34:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:23,108 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 266 transitions. [2022-07-21 09:34:23,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-21 09:34:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 266 transitions. [2022-07-21 09:34:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-21 09:34:23,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:23,109 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:23,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-21 09:34:23,109 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:23,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:23,110 INFO L85 PathProgramCache]: Analyzing trace with hash -271908259, now seen corresponding path program 1 times [2022-07-21 09:34:23,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:23,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569997532] [2022-07-21 09:34:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:23,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:23,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:23,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:23,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:23,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:23,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:34:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:34:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:34:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:34:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:34:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:34:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 09:34:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:34:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-21 09:34:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-21 09:34:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-21 09:34:24,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569997532] [2022-07-21 09:34:24,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569997532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:24,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:24,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-07-21 09:34:24,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846504993] [2022-07-21 09:34:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:24,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 09:34:24,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:24,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 09:34:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-07-21 09:34:24,459 INFO L87 Difference]: Start difference. First operand 242 states and 266 transitions. Second operand has 27 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-21 09:34:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:25,869 INFO L93 Difference]: Finished difference Result 258 states and 289 transitions. [2022-07-21 09:34:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 09:34:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 158 [2022-07-21 09:34:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:25,871 INFO L225 Difference]: With dead ends: 258 [2022-07-21 09:34:25,871 INFO L226 Difference]: Without dead ends: 256 [2022-07-21 09:34:25,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 09:34:25,871 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 146 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:25,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 444 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 09:34:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-21 09:34:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-07-21 09:34:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 188 states have (on average 1.047872340425532) internal successors, (197), 190 states have internal predecessors, (197), 34 states have call successors, (34), 22 states have call predecessors, (34), 23 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2022-07-21 09:34:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 269 transitions. [2022-07-21 09:34:25,914 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 269 transitions. Word has length 158 [2022-07-21 09:34:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:25,914 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 269 transitions. [2022-07-21 09:34:25,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.0) internal successors, (72), 21 states have internal predecessors, (72), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-21 09:34:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 269 transitions. [2022-07-21 09:34:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-21 09:34:25,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:25,915 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-21 09:34:25,915 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1688655625, now seen corresponding path program 1 times [2022-07-21 09:34:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:25,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075047741] [2022-07-21 09:34:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:25,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:34:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:34:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:34:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:34:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:34:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:34:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 09:34:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:34:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-21 09:34:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-21 09:34:26,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075047741] [2022-07-21 09:34:26,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075047741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:26,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:26,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:34:26,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136352617] [2022-07-21 09:34:26,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:26,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:34:26,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:34:26,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:34:26,094 INFO L87 Difference]: Start difference. First operand 246 states and 269 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-21 09:34:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:26,315 INFO L93 Difference]: Finished difference Result 307 states and 337 transitions. [2022-07-21 09:34:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:34:26,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2022-07-21 09:34:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:26,316 INFO L225 Difference]: With dead ends: 307 [2022-07-21 09:34:26,316 INFO L226 Difference]: Without dead ends: 246 [2022-07-21 09:34:26,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:34:26,317 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 106 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:26,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 253 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 09:34:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-21 09:34:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-07-21 09:34:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 188 states have (on average 1.0425531914893618) internal successors, (196), 190 states have internal predecessors, (196), 34 states have call successors, (34), 22 states have call predecessors, (34), 23 states have return successors, (38), 33 states have call predecessors, (38), 33 states have call successors, (38) [2022-07-21 09:34:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 268 transitions. [2022-07-21 09:34:26,344 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 268 transitions. Word has length 162 [2022-07-21 09:34:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:26,345 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 268 transitions. [2022-07-21 09:34:26,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-21 09:34:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 268 transitions. [2022-07-21 09:34:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-21 09:34:26,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:26,346 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:26,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-21 09:34:26,346 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1779804813, now seen corresponding path program 1 times [2022-07-21 09:34:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:26,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700818630] [2022-07-21 09:34:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:34:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:34:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:34:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:34:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:34:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:26,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:34:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 09:34:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:34:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-21 09:34:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-21 09:34:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-07-21 09:34:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-21 09:34:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-21 09:34:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700818630] [2022-07-21 09:34:27,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700818630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:34:27,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:34:27,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-21 09:34:27,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903712189] [2022-07-21 09:34:27,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:34:27,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 09:34:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:34:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 09:34:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-21 09:34:27,211 INFO L87 Difference]: Start difference. First operand 246 states and 268 transitions. Second operand has 22 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-21 09:34:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 09:34:28,148 INFO L93 Difference]: Finished difference Result 270 states and 294 transitions. [2022-07-21 09:34:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:34:28,148 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) Word has length 180 [2022-07-21 09:34:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 09:34:28,149 INFO L225 Difference]: With dead ends: 270 [2022-07-21 09:34:28,149 INFO L226 Difference]: Without dead ends: 233 [2022-07-21 09:34:28,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-07-21 09:34:28,150 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 222 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 09:34:28,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 498 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 09:34:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-21 09:34:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2022-07-21 09:34:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 175 states have internal predecessors, (178), 34 states have call successors, (34), 21 states have call predecessors, (34), 22 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2022-07-21 09:34:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 249 transitions. [2022-07-21 09:34:28,178 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 249 transitions. Word has length 180 [2022-07-21 09:34:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 09:34:28,178 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 249 transitions. [2022-07-21 09:34:28,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 11 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-21 09:34:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 249 transitions. [2022-07-21 09:34:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-21 09:34:28,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 09:34:28,179 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:34:28,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-21 09:34:28,179 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 09:34:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:34:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -611214535, now seen corresponding path program 1 times [2022-07-21 09:34:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:34:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101717571] [2022-07-21 09:34:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:34:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 09:34:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 09:34:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 09:34:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 09:34:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 09:34:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 09:34:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 09:34:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 09:34:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 09:34:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 09:34:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 09:34:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 09:34:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 09:34:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 09:34:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 09:34:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-21 09:34:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-21 09:34:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-07-21 09:34:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-21 09:34:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 66 proven. 7 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-21 09:34:28,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:34:28,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101717571] [2022-07-21 09:34:28,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101717571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:34:28,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51089217] [2022-07-21 09:34:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:34:28,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:34:28,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:34:28,580 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:34:28,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 09:34:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:34:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 09:34:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:34:29,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 09:34:29,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 09:34:29,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-07-21 09:34:37,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-07-21 09:34:43,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-07-21 09:34:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 70 proven. 35 refuted. 7 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 09:34:58,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:35:11,813 INFO L356 Elim1Store]: treesize reduction 14, result has 60.0 percent of original size [2022-07-21 09:35:11,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 117 [2022-07-21 09:35:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-21 09:35:12,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51089217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:35:12,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:35:12,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27, 19] total 54 [2022-07-21 09:35:12,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264757914] [2022-07-21 09:35:12,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:35:12,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 09:35:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:35:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 09:35:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2607, Unknown=14, NotChecked=0, Total=2862 [2022-07-21 09:35:12,427 INFO L87 Difference]: Start difference. First operand 230 states and 249 transitions. Second operand has 54 states, 50 states have (on average 4.82) internal successors, (241), 48 states have internal predecessors, (241), 18 states have call successors, (50), 9 states have call predecessors, (50), 13 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48)