./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_priority_queue_init_static_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 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 22:29:43,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 22:29:43,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 22:29:43,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 22:29:43,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 22:29:43,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 22:29:43,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 22:29:43,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 22:29:43,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 22:29:43,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 22:29:43,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 22:29:43,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 22:29:43,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 22:29:43,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 22:29:43,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 22:29:43,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 22:29:43,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 22:29:43,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 22:29:43,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 22:29:43,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 22:29:43,111 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 22:29:43,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 22:29:43,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 22:29:43,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 22:29:43,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 22:29:43,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 22:29:43,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 22:29:43,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 22:29:43,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 22:29:43,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 22:29:43,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 22:29:43,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 22:29:43,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 22:29:43,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 22:29:43,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 22:29:43,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 22:29:43,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 22:29:43,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 22:29:43,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 22:29:43,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 22:29:43,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 22:29:43,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 22:29:43,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-22 22:29:43,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 22:29:43,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 22:29:43,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 22:29:43,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 22:29:43,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 22:29:43,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 22:29:43,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 22:29:43,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 22:29:43,155 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 22:29:43,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 22:29:43,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 22:29:43,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 22:29:43,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 22:29:43,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 22:29:43,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 22:29:43,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 22:29:43,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 22:29:43,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 22:29:43,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 22:29:43,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 22:29:43,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 22:29:43,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:29:43,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 22:29:43,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 22:29:43,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 22:29:43,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 22:29:43,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 22:29:43,158 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 22:29:43,159 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 22:29:43,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 22:29:43,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d [2022-07-22 22:29:43,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 22:29:43,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 22:29:43,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 22:29:43,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 22:29:43,387 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 22:29:43,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2022-07-22 22:29:43,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23f14af2/6f4a0f95b7984bb5aa448f5815420720/FLAG1a47c2a26 [2022-07-22 22:29:44,116 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 22:29:44,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2022-07-22 22:29:44,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23f14af2/6f4a0f95b7984bb5aa448f5815420720/FLAG1a47c2a26 [2022-07-22 22:29:44,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23f14af2/6f4a0f95b7984bb5aa448f5815420720 [2022-07-22 22:29:44,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 22:29:44,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 22:29:44,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 22:29:44,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 22:29:44,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 22:29:44,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:29:44" (1/1) ... [2022-07-22 22:29:44,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116d7ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:44, skipping insertion in model container [2022-07-22 22:29:44,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:29:44" (1/1) ... [2022-07-22 22:29:44,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 22:29:44,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 22:29:44,752 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_priority_queue_init_static_harness.i[4504,4517] [2022-07-22 22:29:44,759 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_priority_queue_init_static_harness.i[4564,4577] [2022-07-22 22:29:45,447 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:29:45,513 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,515 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,515 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,516 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,518 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,542 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,545 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,546 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,548 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,771 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:29:45,772 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:29:45,773 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:29:45,774 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:29:45,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:29:45,776 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:29:45,776 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:29:45,779 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:29:45,780 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:29:45,781 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:29:45,864 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,865 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:29:45,937 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 22:29:45,949 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_priority_queue_init_static_harness.i[4504,4517] [2022-07-22 22:29:45,950 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_priority_queue_init_static_harness.i[4564,4577] [2022-07-22 22:29:45,975 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-22 22:29:45,988 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,988 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,989 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,989 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,990 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,995 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,996 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,997 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:45,997 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:46,062 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-22 22:29:46,064 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-22 22:29:46,064 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-22 22:29:46,065 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-22 22:29:46,080 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-22 22:29:46,080 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-22 22:29:46,081 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-22 22:29:46,081 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-22 22:29:46,082 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-22 22:29:46,082 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-22 22:29:46,125 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:46,139 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-22 22:29:46,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 22:29:46,304 INFO L208 MainTranslator]: Completed translation [2022-07-22 22:29:46,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46 WrapperNode [2022-07-22 22:29:46,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 22:29:46,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 22:29:46,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 22:29:46,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 22:29:46,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,447 INFO L137 Inliner]: procedures = 689, calls = 1509, calls flagged for inlining = 54, calls inlined = 9, statements flattened = 653 [2022-07-22 22:29:46,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 22:29:46,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 22:29:46,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 22:29:46,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 22:29:46,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 22:29:46,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 22:29:46,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 22:29:46,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 22:29:46,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (1/1) ... [2022-07-22 22:29:46,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 22:29:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:46,605 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) [2022-07-22 22:29:46,639 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 [2022-07-22 22:29:46,654 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-07-22 22:29:46,654 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-07-22 22:29:46,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 22:29:46,654 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-07-22 22:29:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-07-22 22:29:46,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 22:29:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-07-22 22:29:46,657 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-07-22 22:29:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 22:29:46,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 22:29:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 22:29:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 22:29:46,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 22:29:46,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 22:29:46,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 22:29:46,659 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-07-22 22:29:46,660 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-07-22 22:29:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-07-22 22:29:46,660 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-07-22 22:29:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-07-22 22:29:46,660 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-07-22 22:29:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 22:29:46,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 22:29:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 22:29:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 22:29:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 22:29:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-07-22 22:29:46,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-07-22 22:29:46,662 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-22 22:29:46,662 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-22 22:29:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 22:29:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-07-22 22:29:46,663 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-07-22 22:29:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-07-22 22:29:46,663 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-07-22 22:29:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 22:29:46,984 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 22:29:46,985 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 22:29:47,864 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 22:29:47,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 22:29:47,871 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 22:29:47,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:29:47 BoogieIcfgContainer [2022-07-22 22:29:47,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 22:29:47,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 22:29:47,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 22:29:47,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 22:29:47,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:29:44" (1/3) ... [2022-07-22 22:29:47,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed26148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:29:47, skipping insertion in model container [2022-07-22 22:29:47,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:29:46" (2/3) ... [2022-07-22 22:29:47,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed26148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:29:47, skipping insertion in model container [2022-07-22 22:29:47,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:29:47" (3/3) ... [2022-07-22 22:29:47,881 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_static_harness.i [2022-07-22 22:29:47,894 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 22:29:47,895 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 22:29:47,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 22:29:47,973 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@68f39e8c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@678568d4 [2022-07-22 22:29:47,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 22:29:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-07-22 22:29:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-22 22:29:47,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:29:47,991 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 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] [2022-07-22 22:29:47,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:29:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:29:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash 602311799, now seen corresponding path program 1 times [2022-07-22 22:29:48,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:29:48,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31110710] [2022-07-22 22:29:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:29:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:48,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 22:29:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 22:29:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:48,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 22:29:48,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:29:48,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31110710] [2022-07-22 22:29:48,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-22 22:29:48,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238436556] [2022-07-22 22:29:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:48,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:48,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:48,580 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) [2022-07-22 22:29:48,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 22:29:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 2260 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 22:29:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:29:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-22 22:29:49,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:29:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238436556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:29:49,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:29:49,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 22:29:49,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76158163] [2022-07-22 22:29:49,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:29:49,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 22:29:49,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:29:49,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 22:29:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 22:29:49,193 INFO L87 Difference]: Start difference. First operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 22:29:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:29:49,233 INFO L93 Difference]: Finished difference Result 291 states and 418 transitions. [2022-07-22 22:29:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 22:29:49,235 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2022-07-22 22:29:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:29:49,247 INFO L225 Difference]: With dead ends: 291 [2022-07-22 22:29:49,247 INFO L226 Difference]: Without dead ends: 141 [2022-07-22 22:29:49,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 22:29:49,255 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:29:49,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:29:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-22 22:29:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-22 22:29:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 90 states have internal predecessors, (106), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-22 22:29:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2022-07-22 22:29:49,308 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 183 transitions. Word has length 110 [2022-07-22 22:29:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:29:49,308 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 183 transitions. [2022-07-22 22:29:49,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 22:29:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 183 transitions. [2022-07-22 22:29:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 22:29:49,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:29:49,313 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2022-07-22 22:29:49,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 22:29:49,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 22:29:49,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:29:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:29:49,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1578415580, now seen corresponding path program 1 times [2022-07-22 22:29:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:29:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794118766] [2022-07-22 22:29:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:49,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:29:49,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:29:49,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721160587] [2022-07-22 22:29:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:49,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:49,635 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) [2022-07-22 22:29:49,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 22:29:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:50,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2337 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 22:29:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:29:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-07-22 22:29:50,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:29:50,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:29:50,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794118766] [2022-07-22 22:29:50,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:29:50,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721160587] [2022-07-22 22:29:50,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721160587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:29:50,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:29:50,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 22:29:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94253286] [2022-07-22 22:29:50,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:29:50,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 22:29:50,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:29:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 22:29:50,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 22:29:50,289 INFO L87 Difference]: Start difference. First operand 141 states and 183 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-22 22:29:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:29:50,539 INFO L93 Difference]: Finished difference Result 237 states and 304 transitions. [2022-07-22 22:29:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 22:29:50,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 127 [2022-07-22 22:29:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:29:50,544 INFO L225 Difference]: With dead ends: 237 [2022-07-22 22:29:50,544 INFO L226 Difference]: Without dead ends: 143 [2022-07-22 22:29:50,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 22:29:50,552 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 62 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:29:50,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 829 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 22:29:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-22 22:29:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-22 22:29:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 92 states have internal predecessors, (107), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:29:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2022-07-22 22:29:50,592 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 127 [2022-07-22 22:29:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:29:50,594 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2022-07-22 22:29:50,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2022-07-22 22:29:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2022-07-22 22:29:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 22:29:50,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:29:50,600 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1] [2022-07-22 22:29:50,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 22:29:50,809 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,SelfDestructingSolverStorable1 [2022-07-22 22:29:50,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:29:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:29:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1074934923, now seen corresponding path program 1 times [2022-07-22 22:29:50,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:29:50,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303445361] [2022-07-22 22:29:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:29:50,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:29:50,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234592300] [2022-07-22 22:29:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:50,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:50,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:50,887 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) [2022-07-22 22:29:50,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 22:29:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:51,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 22:29:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:29:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:29:51,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:29:51,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:29:51,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303445361] [2022-07-22 22:29:51,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:29:51,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234592300] [2022-07-22 22:29:51,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234592300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:29:51,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:29:51,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 22:29:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316797696] [2022-07-22 22:29:51,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:29:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 22:29:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:29:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 22:29:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 22:29:51,414 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-22 22:29:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:29:51,452 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2022-07-22 22:29:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:29:51,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 142 [2022-07-22 22:29:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:29:51,457 INFO L225 Difference]: With dead ends: 244 [2022-07-22 22:29:51,457 INFO L226 Difference]: Without dead ends: 148 [2022-07-22 22:29:51,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:29:51,459 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 10 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 536 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 [2022-07-22 22:29:51,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 536 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:29:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-22 22:29:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2022-07-22 22:29:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.184782608695652) internal successors, (109), 94 states have internal predecessors, (109), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:29:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2022-07-22 22:29:51,471 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 142 [2022-07-22 22:29:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:29:51,472 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2022-07-22 22:29:51,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-22 22:29:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2022-07-22 22:29:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-22 22:29:51,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:29:51,475 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1] [2022-07-22 22:29:51,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 22:29:51,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:51,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:29:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:29:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1467961933, now seen corresponding path program 1 times [2022-07-22 22:29:51,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:29:51,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67617388] [2022-07-22 22:29:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:51,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:29:51,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:29:51,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083393763] [2022-07-22 22:29:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:29:51,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:29:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:29:51,764 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) [2022-07-22 22:29:51,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 22:29:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:29:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 22:29:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:29:52,393 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 13 treesize of output 9 [2022-07-22 22:29:54,493 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_585 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_585)) |c_#memory_$Pointer$.base|)) is different from true [2022-07-22 22:30:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-22 22:30:03,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:30:03,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:03,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67617388] [2022-07-22 22:30:03,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:03,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083393763] [2022-07-22 22:30:03,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083393763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:30:03,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:30:03,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-22 22:30:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055981951] [2022-07-22 22:30:03,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:30:03,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 22:30:03,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:03,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 22:30:03,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=203, Unknown=3, NotChecked=28, Total=272 [2022-07-22 22:30:03,503 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-07-22 22:30:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:04,582 INFO L93 Difference]: Finished difference Result 365 states and 500 transitions. [2022-07-22 22:30:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 22:30:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) Word has length 142 [2022-07-22 22:30:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:04,586 INFO L225 Difference]: With dead ends: 365 [2022-07-22 22:30:04,586 INFO L226 Difference]: Without dead ends: 267 [2022-07-22 22:30:04,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=65, Invalid=356, Unknown=3, NotChecked=38, Total=462 [2022-07-22 22:30:04,588 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 182 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:04,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1418 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1164 Invalid, 0 Unknown, 735 Unchecked, 0.9s Time] [2022-07-22 22:30:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-22 22:30:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 153. [2022-07-22 22:30:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 14 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2022-07-22 22:30:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-07-22 22:30:04,621 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 142 [2022-07-22 22:30:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:04,622 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-07-22 22:30:04,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-07-22 22:30:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-07-22 22:30:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 22:30:04,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:04,627 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:04,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:04,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:04,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:04,832 INFO L85 PathProgramCache]: Analyzing trace with hash -659588909, now seen corresponding path program 1 times [2022-07-22 22:30:04,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:04,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842760050] [2022-07-22 22:30:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:04,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:04,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11050352] [2022-07-22 22:30:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:04,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:04,926 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) [2022-07-22 22:30:04,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 22:30:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:30:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 22:30:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:05,503 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 13 treesize of output 9 [2022-07-22 22:30:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-22 22:30:05,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:30:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842760050] [2022-07-22 22:30:05,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11050352] [2022-07-22 22:30:05,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11050352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:30:05,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:30:05,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-22 22:30:05,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452865629] [2022-07-22 22:30:05,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:30:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 22:30:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 22:30:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:30:05,647 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-22 22:30:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:06,628 INFO L93 Difference]: Finished difference Result 322 states and 429 transitions. [2022-07-22 22:30:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 22:30:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 148 [2022-07-22 22:30:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:06,632 INFO L225 Difference]: With dead ends: 322 [2022-07-22 22:30:06,632 INFO L226 Difference]: Without dead ends: 216 [2022-07-22 22:30:06,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-07-22 22:30:06,634 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 148 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:06,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 987 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 22:30:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-22 22:30:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 146. [2022-07-22 22:30:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 95 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2022-07-22 22:30:06,649 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 148 [2022-07-22 22:30:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:06,649 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2022-07-22 22:30:06,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-22 22:30:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2022-07-22 22:30:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 22:30:06,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:06,651 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:06,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:06,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:06,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash 940161605, now seen corresponding path program 1 times [2022-07-22 22:30:06,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:06,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036409848] [2022-07-22 22:30:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:06,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:06,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:06,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218314140] [2022-07-22 22:30:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:06,933 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) [2022-07-22 22:30:06,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 22:30:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:30:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 22:30:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:30:07,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:30:07,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:07,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036409848] [2022-07-22 22:30:07,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:07,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218314140] [2022-07-22 22:30:07,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218314140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:30:07,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:30:07,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:30:07,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704406746] [2022-07-22 22:30:07,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:30:07,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:30:07,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:07,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:30:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:30:07,387 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-22 22:30:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:07,539 INFO L93 Difference]: Finished difference Result 250 states and 325 transitions. [2022-07-22 22:30:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:30:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 144 [2022-07-22 22:30:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:07,541 INFO L225 Difference]: With dead ends: 250 [2022-07-22 22:30:07,541 INFO L226 Difference]: Without dead ends: 151 [2022-07-22 22:30:07,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 22:30:07,544 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 7 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:07,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 673 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:30:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-22 22:30:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2022-07-22 22:30:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 96 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-07-22 22:30:07,560 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 144 [2022-07-22 22:30:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:07,561 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-07-22 22:30:07,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-22 22:30:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-07-22 22:30:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 22:30:07,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:07,563 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:07,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:07,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:07,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1620219975, now seen corresponding path program 1 times [2022-07-22 22:30:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000887171] [2022-07-22 22:30:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:07,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:07,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:07,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012331515] [2022-07-22 22:30:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:07,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:07,843 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) [2022-07-22 22:30:07,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 22:30:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:30:08,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 22:30:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:30:08,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:30:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000887171] [2022-07-22 22:30:08,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012331515] [2022-07-22 22:30:08,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012331515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:30:08,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:30:08,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 22:30:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756370053] [2022-07-22 22:30:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:30:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 22:30:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 22:30:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:30:08,346 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-07-22 22:30:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:08,397 INFO L93 Difference]: Finished difference Result 266 states and 340 transitions. [2022-07-22 22:30:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 22:30:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 144 [2022-07-22 22:30:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:08,399 INFO L225 Difference]: With dead ends: 266 [2022-07-22 22:30:08,399 INFO L226 Difference]: Without dead ends: 147 [2022-07-22 22:30:08,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 22:30:08,400 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 13 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:08,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 864 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:30:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-22 22:30:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-07-22 22:30:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 96 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-07-22 22:30:08,411 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 144 [2022-07-22 22:30:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:08,411 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-07-22 22:30:08,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-07-22 22:30:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-07-22 22:30:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 22:30:08,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:08,413 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:08,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:08,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:08,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1782655420, now seen corresponding path program 1 times [2022-07-22 22:30:08,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:08,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707410101] [2022-07-22 22:30:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:08,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:08,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:08,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720865830] [2022-07-22 22:30:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:08,686 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) [2022-07-22 22:30:08,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 22:30:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:30:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 22:30:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:30:09,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:30:09,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:09,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707410101] [2022-07-22 22:30:09,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:09,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720865830] [2022-07-22 22:30:09,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720865830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:30:09,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:30:09,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 22:30:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885434066] [2022-07-22 22:30:09,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:30:09,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 22:30:09,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 22:30:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 22:30:09,227 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-22 22:30:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:09,248 INFO L93 Difference]: Finished difference Result 268 states and 342 transitions. [2022-07-22 22:30:09,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 22:30:09,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 145 [2022-07-22 22:30:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:09,251 INFO L225 Difference]: With dead ends: 268 [2022-07-22 22:30:09,251 INFO L226 Difference]: Without dead ends: 149 [2022-07-22 22:30:09,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 22:30:09,252 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 1 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:09,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 356 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 22:30:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-22 22:30:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-07-22 22:30:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.168421052631579) internal successors, (111), 97 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2022-07-22 22:30:09,262 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 145 [2022-07-22 22:30:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:09,263 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2022-07-22 22:30:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-22 22:30:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2022-07-22 22:30:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 22:30:09,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:09,265 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:09,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:09,475 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,SelfDestructingSolverStorable7 [2022-07-22 22:30:09,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash -626640314, now seen corresponding path program 1 times [2022-07-22 22:30:09,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:09,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198839648] [2022-07-22 22:30:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:09,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:09,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:09,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376244432] [2022-07-22 22:30:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:09,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:09,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:09,532 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) [2022-07-22 22:30:09,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 22:30:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:30:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 22:30:10,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:30:10,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:30:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:30:10,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198839648] [2022-07-22 22:30:10,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376244432] [2022-07-22 22:30:10,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376244432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:30:10,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:30:10,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-22 22:30:10,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971946441] [2022-07-22 22:30:10,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:30:10,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 22:30:10,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 22:30:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-22 22:30:10,446 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:10,569 INFO L93 Difference]: Finished difference Result 270 states and 344 transitions. [2022-07-22 22:30:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 22:30:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 147 [2022-07-22 22:30:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:10,572 INFO L225 Difference]: With dead ends: 270 [2022-07-22 22:30:10,572 INFO L226 Difference]: Without dead ends: 151 [2022-07-22 22:30:10,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-22 22:30:10,573 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 27 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:10,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:30:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-22 22:30:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-07-22 22:30:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2022-07-22 22:30:10,583 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 147 [2022-07-22 22:30:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:10,583 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2022-07-22 22:30:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2022-07-22 22:30:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-22 22:30:10,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:10,585 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:10,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:10,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:10,811 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:10,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2092653112, now seen corresponding path program 2 times [2022-07-22 22:30:10,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:10,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109688096] [2022-07-22 22:30:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:10,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:10,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:10,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816838586] [2022-07-22 22:30:10,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:30:10,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:10,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:10,872 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) [2022-07-22 22:30:10,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 22:30:11,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:30:11,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:30:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 22:30:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 198 proven. 4 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:30:11,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:30:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:30:12,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:12,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109688096] [2022-07-22 22:30:12,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:12,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816838586] [2022-07-22 22:30:12,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816838586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:30:12,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:30:12,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-22 22:30:12,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959043789] [2022-07-22 22:30:12,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:30:12,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 22:30:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 22:30:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-22 22:30:12,102 INFO L87 Difference]: Start difference. First operand 150 states and 192 transitions. Second operand has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:12,258 INFO L93 Difference]: Finished difference Result 272 states and 346 transitions. [2022-07-22 22:30:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 22:30:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 149 [2022-07-22 22:30:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:12,260 INFO L225 Difference]: With dead ends: 272 [2022-07-22 22:30:12,260 INFO L226 Difference]: Without dead ends: 153 [2022-07-22 22:30:12,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-22 22:30:12,261 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 44 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:12,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1550 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:30:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-22 22:30:12,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-07-22 22:30:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 101 states have internal predecessors, (115), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2022-07-22 22:30:12,271 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 149 [2022-07-22 22:30:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:12,271 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2022-07-22 22:30:12,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2022-07-22 22:30:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-22 22:30:12,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:12,273 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:12,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:12,499 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,SelfDestructingSolverStorable9 [2022-07-22 22:30:12,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2113288394, now seen corresponding path program 3 times [2022-07-22 22:30:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121200274] [2022-07-22 22:30:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:12,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:12,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:12,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433542063] [2022-07-22 22:30:12,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:30:12,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:12,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:12,558 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) [2022-07-22 22:30:12,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 22:30:16,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-22 22:30:16,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:30:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 2448 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 22:30:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 198 proven. 9 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:30:16,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:30:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:30:17,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:17,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121200274] [2022-07-22 22:30:17,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:17,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433542063] [2022-07-22 22:30:17,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433542063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:30:17,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:30:17,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-22 22:30:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976007500] [2022-07-22 22:30:17,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:30:17,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 22:30:17,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:17,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 22:30:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-22 22:30:17,215 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 17 states have internal predecessors, (82), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:17,409 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2022-07-22 22:30:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 22:30:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 17 states have internal predecessors, (82), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 151 [2022-07-22 22:30:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:17,411 INFO L225 Difference]: With dead ends: 274 [2022-07-22 22:30:17,412 INFO L226 Difference]: Without dead ends: 155 [2022-07-22 22:30:17,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-22 22:30:17,413 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 33 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:17,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1894 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:30:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-22 22:30:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-07-22 22:30:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 196 transitions. [2022-07-22 22:30:17,422 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 196 transitions. Word has length 151 [2022-07-22 22:30:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:17,422 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 196 transitions. [2022-07-22 22:30:17,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 17 states have internal predecessors, (82), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 196 transitions. [2022-07-22 22:30:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-22 22:30:17,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:17,424 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:17,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:17,642 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,SelfDestructingSolverStorable10 [2022-07-22 22:30:17,642 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1836117172, now seen corresponding path program 4 times [2022-07-22 22:30:17,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548523066] [2022-07-22 22:30:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:17,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:17,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:17,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730285886] [2022-07-22 22:30:17,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 22:30:17,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:17,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:17,716 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) [2022-07-22 22:30:17,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 22:30:18,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 22:30:18,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:30:18,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 22:30:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 198 proven. 16 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:30:18,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:30:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:30:18,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:18,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548523066] [2022-07-22 22:30:18,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730285886] [2022-07-22 22:30:18,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730285886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:30:18,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:30:18,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-22 22:30:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225868177] [2022-07-22 22:30:18,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:30:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 22:30:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 22:30:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-22 22:30:18,931 INFO L87 Difference]: Start difference. First operand 154 states and 196 transitions. Second operand has 19 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:19,150 INFO L93 Difference]: Finished difference Result 276 states and 350 transitions. [2022-07-22 22:30:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 22:30:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 153 [2022-07-22 22:30:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:19,153 INFO L225 Difference]: With dead ends: 276 [2022-07-22 22:30:19,153 INFO L226 Difference]: Without dead ends: 157 [2022-07-22 22:30:19,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-22 22:30:19,154 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 33 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:19,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2240 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:30:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-22 22:30:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-07-22 22:30:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 105 states have internal predecessors, (119), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2022-07-22 22:30:19,164 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 153 [2022-07-22 22:30:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:19,165 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2022-07-22 22:30:19,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2022-07-22 22:30:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-22 22:30:19,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:19,167 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:19,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:19,395 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,SelfDestructingSolverStorable11 [2022-07-22 22:30:19,395 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:19,396 INFO L85 PathProgramCache]: Analyzing trace with hash -463776434, now seen corresponding path program 5 times [2022-07-22 22:30:19,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:19,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341855432] [2022-07-22 22:30:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:19,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:19,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:19,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740706416] [2022-07-22 22:30:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 22:30:19,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:19,502 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) [2022-07-22 22:30:19,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 22:30:20,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 22:30:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:30:20,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 22:30:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:30:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 198 proven. 25 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:30:20,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:30:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:30:21,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:30:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341855432] [2022-07-22 22:30:21,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:30:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740706416] [2022-07-22 22:30:21,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740706416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:30:21,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:30:21,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-22 22:30:21,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806369143] [2022-07-22 22:30:21,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:30:21,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 22:30:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:30:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 22:30:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-07-22 22:30:21,492 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 25 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 25 states have internal predecessors, (90), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:30:22,121 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-07-22 22:30:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 22:30:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 25 states have internal predecessors, (90), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 155 [2022-07-22 22:30:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:30:22,130 INFO L225 Difference]: With dead ends: 278 [2022-07-22 22:30:22,130 INFO L226 Difference]: Without dead ends: 159 [2022-07-22 22:30:22,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-07-22 22:30:22,132 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 41 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 22:30:22,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2582 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 22:30:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-22 22:30:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-07-22 22:30:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 107 states have internal predecessors, (121), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-07-22 22:30:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2022-07-22 22:30:22,143 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 155 [2022-07-22 22:30:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:30:22,144 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2022-07-22 22:30:22,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 25 states have internal predecessors, (90), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:30:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2022-07-22 22:30:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 22:30:22,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:30:22,146 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:30:22,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 22:30:22,354 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,SelfDestructingSolverStorable12 [2022-07-22 22:30:22,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:30:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:30:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash -199287088, now seen corresponding path program 6 times [2022-07-22 22:30:22,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:30:22,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338992919] [2022-07-22 22:30:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:30:22,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:30:22,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:30:22,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410753989] [2022-07-22 22:30:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 22:30:22,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:30:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:30:22,468 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) [2022-07-22 22:30:22,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 22:31:26,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-22 22:31:26,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:31:26,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 161 conjunts are in the unsatisfiable core [2022-07-22 22:31:26,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:31:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:27,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-07-22 22:31:27,131 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 13 treesize of output 9 [2022-07-22 22:31:27,138 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 [2022-07-22 22:31:55,153 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:31:55,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:55,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:56,825 INFO L356 Elim1Store]: treesize reduction 277, result has 20.6 percent of original size [2022-07-22 22:31:56,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 26 case distinctions, treesize of input 388 treesize of output 547 [2022-07-22 22:31:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:56,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 557 treesize of output 661 [2022-07-22 22:31:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:31:56,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 670 treesize of output 774 [2022-07-22 22:31:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 57 proven. 27 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-22 22:31:57,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:32:50,628 WARN L233 SmtUtils]: Spent 38.76s on a formula simplification. DAG size of input: 76 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:32:50,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:32:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338992919] [2022-07-22 22:32:50,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:32:50,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410753989] [2022-07-22 22:32:50,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410753989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 22:32:50,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 22:32:50,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-22 22:32:50,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873148428] [2022-07-22 22:32:50,633 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 22:32:50,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 22:32:50,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:32:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 22:32:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=917, Unknown=3, NotChecked=0, Total=992 [2022-07-22 22:32:50,634 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand has 28 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 10 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-22 22:33:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:33:01,247 INFO L93 Difference]: Finished difference Result 383 states and 506 transitions. [2022-07-22 22:33:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 22:33:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 10 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 157 [2022-07-22 22:33:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:33:01,249 INFO L225 Difference]: With dead ends: 383 [2022-07-22 22:33:01,249 INFO L226 Difference]: Without dead ends: 381 [2022-07-22 22:33:01,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=304, Invalid=3353, Unknown=3, NotChecked=0, Total=3660 [2022-07-22 22:33:01,251 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 288 mSDsluCounter, 2976 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2030 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 22:33:01,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 3214 Invalid, 5254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2961 Invalid, 0 Unknown, 2030 Unchecked, 2.5s Time] [2022-07-22 22:33:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-22 22:33:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2022-07-22 22:33:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 220 states have (on average 1.15) internal successors, (253), 224 states have internal predecessors, (253), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-22 22:33:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 424 transitions. [2022-07-22 22:33:01,276 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 424 transitions. Word has length 157 [2022-07-22 22:33:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:33:01,276 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 424 transitions. [2022-07-22 22:33:01,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 10 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-22 22:33:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 424 transitions. [2022-07-22 22:33:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 22:33:01,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:33:01,278 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:33:01,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 22:33:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:01,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:33:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:33:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1137510896, now seen corresponding path program 1 times [2022-07-22 22:33:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:33:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398516763] [2022-07-22 22:33:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:33:01,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:33:01,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108964075] [2022-07-22 22:33:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:01,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:33:01,558 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) [2022-07-22 22:33:01,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 22:33:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:33:02,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 22:33:02,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:33:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 198 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:33:02,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:33:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:33:03,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:33:03,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398516763] [2022-07-22 22:33:03,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:33:03,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108964075] [2022-07-22 22:33:03,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108964075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:33:03,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:33:03,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-07-22 22:33:03,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840887528] [2022-07-22 22:33:03,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:33:03,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 22:33:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:33:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 22:33:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-07-22 22:33:03,208 INFO L87 Difference]: Start difference. First operand 328 states and 424 transitions. Second operand has 23 states, 21 states have (on average 4.476190476190476) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:33:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:33:03,535 INFO L93 Difference]: Finished difference Result 589 states and 763 transitions. [2022-07-22 22:33:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 22:33:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.476190476190476) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 157 [2022-07-22 22:33:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:33:03,539 INFO L225 Difference]: With dead ends: 589 [2022-07-22 22:33:03,539 INFO L226 Difference]: Without dead ends: 334 [2022-07-22 22:33:03,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-07-22 22:33:03,541 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 41 mSDsluCounter, 2070 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 22:33:03,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2246 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 22:33:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-07-22 22:33:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-07-22 22:33:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 224 states have (on average 1.1473214285714286) internal successors, (257), 228 states have internal predecessors, (257), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-22 22:33:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 428 transitions. [2022-07-22 22:33:03,563 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 428 transitions. Word has length 157 [2022-07-22 22:33:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:33:03,564 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 428 transitions. [2022-07-22 22:33:03,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.476190476190476) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:33:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 428 transitions. [2022-07-22 22:33:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-22 22:33:03,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:33:03,566 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:33:03,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 22:33:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 22:33:03,780 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:33:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:33:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash -366319854, now seen corresponding path program 2 times [2022-07-22 22:33:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:33:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867765143] [2022-07-22 22:33:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:03,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:33:03,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:33:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653240236] [2022-07-22 22:33:03,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:33:03,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:03,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:33:03,862 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) [2022-07-22 22:33:03,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 22:33:05,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:33:05,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:33:05,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 22:33:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:33:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 198 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:33:05,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:33:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:33:06,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:33:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867765143] [2022-07-22 22:33:06,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:33:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653240236] [2022-07-22 22:33:06,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653240236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:33:06,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:33:06,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-07-22 22:33:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469144209] [2022-07-22 22:33:06,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:33:06,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 22:33:06,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:33:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 22:33:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-07-22 22:33:06,151 INFO L87 Difference]: Start difference. First operand 332 states and 428 transitions. Second operand has 27 states, 25 states have (on average 3.92) internal successors, (98), 27 states have internal predecessors, (98), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:33:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:33:06,916 INFO L93 Difference]: Finished difference Result 593 states and 767 transitions. [2022-07-22 22:33:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 22:33:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.92) internal successors, (98), 27 states have internal predecessors, (98), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 159 [2022-07-22 22:33:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:33:06,921 INFO L225 Difference]: With dead ends: 593 [2022-07-22 22:33:06,921 INFO L226 Difference]: Without dead ends: 338 [2022-07-22 22:33:06,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 22:33:06,922 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 58 mSDsluCounter, 3096 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 22:33:06,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 3272 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 22:33:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-22 22:33:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2022-07-22 22:33:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 228 states have (on average 1.144736842105263) internal successors, (261), 232 states have internal predecessors, (261), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-22 22:33:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 432 transitions. [2022-07-22 22:33:06,944 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 432 transitions. Word has length 159 [2022-07-22 22:33:06,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:33:06,945 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 432 transitions. [2022-07-22 22:33:06,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.92) internal successors, (98), 27 states have internal predecessors, (98), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-07-22 22:33:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 432 transitions. [2022-07-22 22:33:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-22 22:33:06,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:33:06,947 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:33:06,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 22:33:07,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 22:33:07,163 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:33:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:33:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2013896596, now seen corresponding path program 3 times [2022-07-22 22:33:07,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:33:07,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207989106] [2022-07-22 22:33:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:07,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:33:07,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:33:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943984729] [2022-07-22 22:33:07,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:33:07,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:33:07,218 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) [2022-07-22 22:33:07,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 22:33:08,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 22:33:08,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:33:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-22 22:33:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:33:08,811 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 9 treesize of output 3 [2022-07-22 22:33:08,959 INFO L356 Elim1Store]: treesize reduction 84, result has 21.5 percent of original size [2022-07-22 22:33:08,959 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 2 case distinctions, treesize of input 27 treesize of output 32 [2022-07-22 22:33:28,736 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 22:33:29,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 22:33:29,697 INFO L356 Elim1Store]: treesize reduction 638, result has 19.1 percent of original size [2022-07-22 22:33:29,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 34 case distinctions, treesize of input 255 treesize of output 421 [2022-07-22 22:33:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-07-22 22:33:30,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:33:30,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:33:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207989106] [2022-07-22 22:33:30,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:33:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943984729] [2022-07-22 22:33:30,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943984729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:33:30,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:33:30,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-22 22:33:30,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189876689] [2022-07-22 22:33:30,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:33:30,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 22:33:30,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:33:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 22:33:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=539, Unknown=2, NotChecked=0, Total=600 [2022-07-22 22:33:30,053 INFO L87 Difference]: Start difference. First operand 336 states and 432 transitions. Second operand has 25 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-07-22 22:33:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:33:32,097 INFO L93 Difference]: Finished difference Result 506 states and 705 transitions. [2022-07-22 22:33:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 22:33:32,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 161 [2022-07-22 22:33:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:33:32,100 INFO L225 Difference]: With dead ends: 506 [2022-07-22 22:33:32,101 INFO L226 Difference]: Without dead ends: 504 [2022-07-22 22:33:32,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=104, Invalid=1016, Unknown=2, NotChecked=0, Total=1122 [2022-07-22 22:33:32,102 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 141 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 942 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 22:33:32,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 2416 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1961 Invalid, 0 Unknown, 942 Unchecked, 1.8s Time] [2022-07-22 22:33:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-22 22:33:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 337. [2022-07-22 22:33:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 229 states have (on average 1.148471615720524) internal successors, (263), 233 states have internal predecessors, (263), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-22 22:33:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 434 transitions. [2022-07-22 22:33:32,130 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 434 transitions. Word has length 161 [2022-07-22 22:33:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:33:32,130 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 434 transitions. [2022-07-22 22:33:32,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-07-22 22:33:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 434 transitions. [2022-07-22 22:33:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-22 22:33:32,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:33:32,132 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:33:32,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 22:33:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 22:33:32,336 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:33:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:33:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1601012330, now seen corresponding path program 1 times [2022-07-22 22:33:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:33:32,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630242191] [2022-07-22 22:33:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:33:32,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:33:32,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872232899] [2022-07-22 22:33:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:32,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:32,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:33:32,396 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) [2022-07-22 22:33:32,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 22:33:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:33:32,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2647 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 22:33:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:33:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-22 22:33:33,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 22:33:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:33:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630242191] [2022-07-22 22:33:33,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:33:33,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872232899] [2022-07-22 22:33:33,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872232899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 22:33:33,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 22:33:33,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 22:33:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509893463] [2022-07-22 22:33:33,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 22:33:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 22:33:33,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:33:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 22:33:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 22:33:33,028 INFO L87 Difference]: Start difference. First operand 337 states and 434 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-22 22:33:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:33:33,201 INFO L93 Difference]: Finished difference Result 557 states and 735 transitions. [2022-07-22 22:33:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 22:33:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 161 [2022-07-22 22:33:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:33:33,204 INFO L225 Difference]: With dead ends: 557 [2022-07-22 22:33:33,204 INFO L226 Difference]: Without dead ends: 349 [2022-07-22 22:33:33,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 22:33:33,205 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 13 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 22:33:33,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 664 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 22:33:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-22 22:33:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 337. [2022-07-22 22:33:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 233 states have internal predecessors, (261), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-22 22:33:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 432 transitions. [2022-07-22 22:33:33,231 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 432 transitions. Word has length 161 [2022-07-22 22:33:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:33:33,232 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 432 transitions. [2022-07-22 22:33:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2022-07-22 22:33:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 432 transitions. [2022-07-22 22:33:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-22 22:33:33,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:33:33,234 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:33:33,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 22:33:33,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 22:33:33,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:33:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:33:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash 709060506, now seen corresponding path program 1 times [2022-07-22 22:33:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:33:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317534075] [2022-07-22 22:33:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:33:33,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:33:33,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549714858] [2022-07-22 22:33:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:33,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:33,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:33:33,509 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) [2022-07-22 22:33:33,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 22:33:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 22:33:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 22:33:34,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:33:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 198 proven. 64 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:33:34,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:33:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:33:35,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:33:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317534075] [2022-07-22 22:33:35,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:33:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549714858] [2022-07-22 22:33:35,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549714858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:33:35,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:33:35,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-07-22 22:33:35,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823339094] [2022-07-22 22:33:35,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:33:35,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 22:33:35,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:33:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 22:33:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-22 22:33:35,250 INFO L87 Difference]: Start difference. First operand 337 states and 432 transitions. Second operand has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-22 22:33:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:33:35,678 INFO L93 Difference]: Finished difference Result 599 states and 771 transitions. [2022-07-22 22:33:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 22:33:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 167 [2022-07-22 22:33:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:33:35,681 INFO L225 Difference]: With dead ends: 599 [2022-07-22 22:33:35,681 INFO L226 Difference]: Without dead ends: 343 [2022-07-22 22:33:35,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-22 22:33:35,682 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 66 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 22:33:35,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2256 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 22:33:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-22 22:33:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2022-07-22 22:33:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 233 states have (on average 1.1373390557939915) internal successors, (265), 237 states have internal predecessors, (265), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-22 22:33:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 436 transitions. [2022-07-22 22:33:35,708 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 436 transitions. Word has length 167 [2022-07-22 22:33:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:33:35,708 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 436 transitions. [2022-07-22 22:33:35,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-22 22:33:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 436 transitions. [2022-07-22 22:33:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-22 22:33:35,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:33:35,710 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:33:35,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 22:33:35,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:35,926 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:33:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:33:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1406468580, now seen corresponding path program 2 times [2022-07-22 22:33:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:33:35,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661313041] [2022-07-22 22:33:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:35,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:33:35,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:33:35,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797693880] [2022-07-22 22:33:35,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 22:33:35,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:33:35,976 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) [2022-07-22 22:33:35,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 22:33:37,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 22:33:37,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 22:33:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 22:33:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 22:33:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 198 proven. 81 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-07-22 22:33:37,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 22:33:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-07-22 22:33:38,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 22:33:38,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661313041] [2022-07-22 22:33:38,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 22:33:38,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797693880] [2022-07-22 22:33:38,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797693880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 22:33:38,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 22:33:38,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2022-07-22 22:33:38,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756477810] [2022-07-22 22:33:38,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 22:33:38,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 22:33:38,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 22:33:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 22:33:38,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-07-22 22:33:38,310 INFO L87 Difference]: Start difference. First operand 341 states and 436 transitions. Second operand has 31 states, 29 states have (on average 4.0) internal successors, (116), 31 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-22 22:33:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 22:33:39,028 INFO L93 Difference]: Finished difference Result 603 states and 775 transitions. [2022-07-22 22:33:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 22:33:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.0) internal successors, (116), 31 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 169 [2022-07-22 22:33:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 22:33:39,031 INFO L225 Difference]: With dead ends: 603 [2022-07-22 22:33:39,031 INFO L226 Difference]: Without dead ends: 347 [2022-07-22 22:33:39,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 22:33:39,032 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 62 mSDsluCounter, 3272 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3448 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 22:33:39,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 3448 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 22:33:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-07-22 22:33:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2022-07-22 22:33:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 237 states have (on average 1.1350210970464134) internal successors, (269), 241 states have internal predecessors, (269), 77 states have call successors, (77), 26 states have call predecessors, (77), 30 states have return successors, (94), 77 states have call predecessors, (94), 75 states have call successors, (94) [2022-07-22 22:33:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 440 transitions. [2022-07-22 22:33:39,055 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 440 transitions. Word has length 169 [2022-07-22 22:33:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 22:33:39,055 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 440 transitions. [2022-07-22 22:33:39,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.0) internal successors, (116), 31 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-07-22 22:33:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 440 transitions. [2022-07-22 22:33:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-22 22:33:39,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 22:33:39,057 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 22:33:39,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-22 22:33:39,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:39,283 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 22:33:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 22:33:39,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1384578078, now seen corresponding path program 3 times [2022-07-22 22:33:39,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 22:33:39,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143067454] [2022-07-22 22:33:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 22:33:39,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 22:33:39,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 22:33:39,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019488801] [2022-07-22 22:33:39,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 22:33:39,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 22:33:39,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 22:33:39,341 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) [2022-07-22 22:33:39,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process