./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_clean_up_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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:02:10,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:02:10,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:02:10,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:02:10,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:02:10,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:02:10,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:02:10,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:02:10,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:02:10,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:02:10,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:02:10,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:02:10,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:02:10,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:02:10,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:02:10,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:02:10,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:02:10,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:02:10,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:02:10,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:02:10,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:02:10,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:02:10,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:02:10,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:02:10,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:02:10,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:02:10,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:02:10,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:02:10,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:02:10,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:02:10,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:02:10,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:02:10,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:02:10,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:02:10,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:02:10,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:02:10,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:02:10,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:02:10,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:02:10,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:02:10,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:02:10,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:02:10,199 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:02:10,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:02:10,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:02:10,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:02:10,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:02:10,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:02:10,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:02:10,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:02:10,202 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:02:10,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:02:10,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:02:10,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:02:10,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:02:10,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:02:10,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:02:10,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:02:10,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:02:10,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:02:10,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:02:10,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:02:10,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:02:10,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:02:10,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:02:10,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:02:10,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:02:10,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:02:10,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:02:10,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:02:10,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:02:10,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:02:10,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:02:10,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-12-22 14:02:10,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:02:10,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:02:10,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:02:10,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:02:10,439 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:02:10,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-22 14:02:10,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd68c395/6a49d0c1c88d4cc8ac8a8ba528a501bd/FLAG82015375d [2021-12-22 14:02:11,080 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:02:11,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-22 14:02:11,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd68c395/6a49d0c1c88d4cc8ac8a8ba528a501bd/FLAG82015375d [2021-12-22 14:02:11,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd68c395/6a49d0c1c88d4cc8ac8a8ba528a501bd [2021-12-22 14:02:11,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:02:11,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:02:11,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:02:11,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:02:11,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:02:11,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:02:11" (1/1) ... [2021-12-22 14:02:11,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1610ffbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:11, skipping insertion in model container [2021-12-22 14:02:11,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:02:11" (1/1) ... [2021-12-22 14:02:11,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:02:11,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:02:11,548 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_clean_up_harness.i[4501,4514] [2021-12-22 14:02:11,554 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_clean_up_harness.i[4561,4574] [2021-12-22 14:02:12,096 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:02:12,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,168 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,169 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,181 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,185 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,188 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,435 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:02:12,436 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:02:12,437 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:02:12,441 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:02:12,442 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:02:12,442 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:02:12,443 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:02:12,444 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:02:12,444 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:02:12,445 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:02:12,558 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,559 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:02:12,639 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:02:12,670 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_clean_up_harness.i[4501,4514] [2021-12-22 14:02:12,671 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_clean_up_harness.i[4561,4574] [2021-12-22 14:02:12,700 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-22 14:02:12,711 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,712 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,712 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,712 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,713 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,718 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,719 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,744 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-22 14:02:12,745 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-22 14:02:12,745 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-22 14:02:12,746 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-22 14:02:12,747 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-22 14:02:12,747 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-22 14:02:12,747 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-22 14:02:12,748 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-22 14:02:12,748 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-22 14:02:12,748 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-22 14:02:12,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,771 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-22 14:02:12,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:02:13,043 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:02:13,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13 WrapperNode [2021-12-22 14:02:13,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:02:13,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:02:13,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:02:13,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:02:13,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,167 INFO L137 Inliner]: procedures = 689, calls = 1497, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 598 [2021-12-22 14:02:13,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:02:13,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:02:13,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:02:13,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:02:13,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:02:13,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:02:13,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:02:13,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:02:13,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (1/1) ... [2021-12-22 14:02:13,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:02:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:13,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:02:13,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:02:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-22 14:02:13,337 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-22 14:02:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:02:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-22 14:02:13,338 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-22 14:02:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-22 14:02:13,339 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-22 14:02:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-22 14:02:13,339 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-22 14:02:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:02:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-22 14:02:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-22 14:02:13,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 14:02:13,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 14:02:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:02:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:02:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:02:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:02:13,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:02:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2021-12-22 14:02:13,343 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2021-12-22 14:02:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-22 14:02:13,343 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-22 14:02:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-22 14:02:13,344 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-22 14:02:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-22 14:02:13,344 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-22 14:02:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-22 14:02:13,344 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-22 14:02:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:02:13,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:02:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:02:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:02:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:02:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-22 14:02:13,346 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-22 14:02:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-22 14:02:13,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-22 14:02:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:02:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-22 14:02:13,347 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-22 14:02:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-22 14:02:13,347 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-22 14:02:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-22 14:02:13,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-22 14:02:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:02:13,593 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:02:13,595 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:02:14,217 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:02:14,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:02:14,224 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 14:02:14,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:02:14 BoogieIcfgContainer [2021-12-22 14:02:14,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:02:14,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:02:14,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:02:14,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:02:14,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:02:11" (1/3) ... [2021-12-22 14:02:14,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1914799c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:02:14, skipping insertion in model container [2021-12-22 14:02:14,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:13" (2/3) ... [2021-12-22 14:02:14,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1914799c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:02:14, skipping insertion in model container [2021-12-22 14:02:14,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:02:14" (3/3) ... [2021-12-22 14:02:14,235 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-12-22 14:02:14,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:02:14,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:02:14,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:02:14,310 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:02:14,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:02:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-22 14:02:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-22 14:02:14,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:14,352 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:14,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:14,359 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2021-12-22 14:02:14,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960729684] [2021-12-22 14:02:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:14,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 14:02:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 14:02:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:02:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 14:02:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:02:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:14,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:02:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:02:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:02:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 14:02:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 14:02:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 14:02:15,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:15,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960729684] [2021-12-22 14:02:15,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960729684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:15,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:15,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:02:15,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187586571] [2021-12-22 14:02:15,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:15,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:02:15,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:02:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:15,150 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-22 14:02:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:15,552 INFO L93 Difference]: Finished difference Result 361 states and 504 transitions. [2021-12-22 14:02:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:02:15,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-12-22 14:02:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:15,569 INFO L225 Difference]: With dead ends: 361 [2021-12-22 14:02:15,569 INFO L226 Difference]: Without dead ends: 202 [2021-12-22 14:02:15,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:15,581 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:15,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 305 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 14:02:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-22 14:02:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-12-22 14:02:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-22 14:02:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-22 14:02:15,633 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2021-12-22 14:02:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:15,633 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-22 14:02:15,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-22 14:02:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-22 14:02:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-22 14:02:15,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:15,637 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:15,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:02:15,638 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:15,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2021-12-22 14:02:15,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:15,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641368976] [2021-12-22 14:02:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:15,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 14:02:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 14:02:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:02:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 14:02:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:02:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:15,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:02:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:02:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:02:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:02:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 14:02:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 14:02:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 14:02:16,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:16,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641368976] [2021-12-22 14:02:16,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641368976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:16,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:16,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 14:02:16,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636873287] [2021-12-22 14:02:16,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:16,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 14:02:16,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 14:02:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:02:16,130 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-22 14:02:16,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:16,767 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2021-12-22 14:02:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:02:16,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2021-12-22 14:02:16,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:16,770 INFO L225 Difference]: With dead ends: 341 [2021-12-22 14:02:16,771 INFO L226 Difference]: Without dead ends: 245 [2021-12-22 14:02:16,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 14:02:16,772 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 278 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:16,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 676 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 14:02:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-22 14:02:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2021-12-22 14:02:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-22 14:02:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2021-12-22 14:02:16,790 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2021-12-22 14:02:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:16,791 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2021-12-22 14:02:16,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-22 14:02:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2021-12-22 14:02:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 14:02:16,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:16,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:02:16,793 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2021-12-22 14:02:16,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:16,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150962341] [2021-12-22 14:02:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:16,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:02:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 14:02:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 14:02:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:02:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 14:02:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:02:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:02:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:02:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 14:02:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 14:02:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:02:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:02:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:02:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 14:02:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 14:02:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 14:02:17,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150962341] [2021-12-22 14:02:17,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150962341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:17,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:17,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 14:02:17,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190465746] [2021-12-22 14:02:17,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:17,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 14:02:17,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 14:02:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:02:17,232 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-22 14:02:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:18,146 INFO L93 Difference]: Finished difference Result 371 states and 489 transitions. [2021-12-22 14:02:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 14:02:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2021-12-22 14:02:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:18,150 INFO L225 Difference]: With dead ends: 371 [2021-12-22 14:02:18,150 INFO L226 Difference]: Without dead ends: 226 [2021-12-22 14:02:18,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-12-22 14:02:18,151 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 255 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:18,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 952 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 14:02:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-22 14:02:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2021-12-22 14:02:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-22 14:02:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2021-12-22 14:02:18,167 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2021-12-22 14:02:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:18,168 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2021-12-22 14:02:18,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-22 14:02:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2021-12-22 14:02:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 14:02:18,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:18,170 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:18,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:02:18,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:18,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2021-12-22 14:02:18,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:18,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102712424] [2021-12-22 14:02:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:18,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:18,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:18,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574923087] [2021-12-22 14:02:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:18,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:18,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:18,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:18,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:02:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 14:02:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 14:02:19,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:19,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:19,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102712424] [2021-12-22 14:02:19,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:19,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574923087] [2021-12-22 14:02:19,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574923087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:19,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:19,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:02:19,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040617785] [2021-12-22 14:02:19,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:19,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:02:19,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:19,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:02:19,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:02:19,074 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-22 14:02:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:19,246 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2021-12-22 14:02:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:02:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2021-12-22 14:02:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:19,248 INFO L225 Difference]: With dead ends: 261 [2021-12-22 14:02:19,248 INFO L226 Difference]: Without dead ends: 162 [2021-12-22 14:02:19,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 14:02:19,250 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 235 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:19,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 802 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:02:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-22 14:02:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-22 14:02:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-22 14:02:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-12-22 14:02:19,273 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2021-12-22 14:02:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:19,273 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-12-22 14:02:19,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-22 14:02:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-12-22 14:02:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 14:02:19,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:19,280 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:19,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:19,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:19,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2021-12-22 14:02:19,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:19,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239733642] [2021-12-22 14:02:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:19,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:19,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290879701] [2021-12-22 14:02:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:19,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:19,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:19,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:19,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:02:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 14:02:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-22 14:02:20,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:20,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:20,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239733642] [2021-12-22 14:02:20,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:20,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290879701] [2021-12-22 14:02:20,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290879701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:20,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:20,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 14:02:20,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890162148] [2021-12-22 14:02:20,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:20,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:02:20,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:02:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:02:20,316 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-22 14:02:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:20,552 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2021-12-22 14:02:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:02:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2021-12-22 14:02:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:20,554 INFO L225 Difference]: With dead ends: 274 [2021-12-22 14:02:20,554 INFO L226 Difference]: Without dead ends: 162 [2021-12-22 14:02:20,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:02:20,555 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 300 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:20,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1070 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:02:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-22 14:02:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-22 14:02:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-22 14:02:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2021-12-22 14:02:20,567 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2021-12-22 14:02:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:20,567 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2021-12-22 14:02:20,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-22 14:02:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2021-12-22 14:02:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 14:02:20,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:20,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:20,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:20,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:20,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:20,781 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2021-12-22 14:02:20,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:20,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503122864] [2021-12-22 14:02:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:20,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:20,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724076098] [2021-12-22 14:02:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:20,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:20,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:20,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:20,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 14:02:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 14:02:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-22 14:02:21,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:21,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:21,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503122864] [2021-12-22 14:02:21,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:21,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724076098] [2021-12-22 14:02:21,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724076098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:21,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:21,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:02:21,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60763054] [2021-12-22 14:02:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:21,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:02:21,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:02:21,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:02:21,677 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:21,862 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2021-12-22 14:02:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 14:02:21,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-12-22 14:02:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:21,866 INFO L225 Difference]: With dead ends: 286 [2021-12-22 14:02:21,866 INFO L226 Difference]: Without dead ends: 180 [2021-12-22 14:02:21,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:02:21,867 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 21 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:21,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 897 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:02:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-22 14:02:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2021-12-22 14:02:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 115 states have internal predecessors, (136), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-22 14:02:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2021-12-22 14:02:21,882 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 176 [2021-12-22 14:02:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:21,885 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2021-12-22 14:02:21,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2021-12-22 14:02:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 14:02:21,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:21,889 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:21,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:22,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:22,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 28701509, now seen corresponding path program 1 times [2021-12-22 14:02:22,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:22,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570558554] [2021-12-22 14:02:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:22,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:22,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:22,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940906581] [2021-12-22 14:02:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:22,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:22,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:22,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 14:02:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:02:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-22 14:02:22,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:22,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570558554] [2021-12-22 14:02:22,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940906581] [2021-12-22 14:02:22,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940906581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:22,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:22,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:02:22,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522064017] [2021-12-22 14:02:22,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:22,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:02:22,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:02:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:22,896 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:22,921 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2021-12-22 14:02:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:02:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-12-22 14:02:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:22,923 INFO L225 Difference]: With dead ends: 274 [2021-12-22 14:02:22,923 INFO L226 Difference]: Without dead ends: 170 [2021-12-22 14:02:22,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:02:22,925 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 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 [2021-12-22 14:02:22,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-22 14:02:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-12-22 14:02:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-22 14:02:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-12-22 14:02:22,935 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 176 [2021-12-22 14:02:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:22,936 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-12-22 14:02:22,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-12-22 14:02:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 14:02:22,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:22,938 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:22,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:23,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:23,152 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash -463924665, now seen corresponding path program 1 times [2021-12-22 14:02:23,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:23,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736309252] [2021-12-22 14:02:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:23,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:23,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:23,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279271613] [2021-12-22 14:02:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:23,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:23,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:23,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 14:02:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 14:02:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-22 14:02:23,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-22 14:02:24,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736309252] [2021-12-22 14:02:24,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279271613] [2021-12-22 14:02:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279271613] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:24,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:02:24,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-22 14:02:24,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11035631] [2021-12-22 14:02:24,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:24,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:02:24,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:02:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:02:24,290 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-22 14:02:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:24,329 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2021-12-22 14:02:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:02:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 176 [2021-12-22 14:02:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:24,331 INFO L225 Difference]: With dead ends: 178 [2021-12-22 14:02:24,331 INFO L226 Difference]: Without dead ends: 176 [2021-12-22 14:02:24,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:02:24,332 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:24,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 978 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-22 14:02:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-12-22 14:02:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 122 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-22 14:02:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2021-12-22 14:02:24,343 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 176 [2021-12-22 14:02:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:24,343 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2021-12-22 14:02:24,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-22 14:02:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2021-12-22 14:02:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 14:02:24,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:24,346 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:24,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:24,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:24,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1104137534, now seen corresponding path program 1 times [2021-12-22 14:02:24,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:24,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208725677] [2021-12-22 14:02:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:24,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:24,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:24,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863822591] [2021-12-22 14:02:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:24,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:24,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:24,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 14:02:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 14:02:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 14:02:25,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:25,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208725677] [2021-12-22 14:02:25,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863822591] [2021-12-22 14:02:25,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863822591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:25,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:25,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:02:25,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022902145] [2021-12-22 14:02:25,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:25,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:02:25,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:02:25,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:02:25,293 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-22 14:02:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:25,332 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2021-12-22 14:02:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:02:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 176 [2021-12-22 14:02:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:25,335 INFO L225 Difference]: With dead ends: 281 [2021-12-22 14:02:25,335 INFO L226 Difference]: Without dead ends: 175 [2021-12-22 14:02:25,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:02:25,336 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:25,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 950 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-22 14:02:25,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-12-22 14:02:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-22 14:02:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2021-12-22 14:02:25,346 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 176 [2021-12-22 14:02:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:25,347 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2021-12-22 14:02:25,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-22 14:02:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2021-12-22 14:02:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-22 14:02:25,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:25,349 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:25,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:25,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:25,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1406424536, now seen corresponding path program 1 times [2021-12-22 14:02:25,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527715273] [2021-12-22 14:02:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:25,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:25,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247533466] [2021-12-22 14:02:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:25,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:25,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:25,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 14:02:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 14:02:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-22 14:02:26,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:26,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527715273] [2021-12-22 14:02:26,280 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247533466] [2021-12-22 14:02:26,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247533466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:26,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:26,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:02:26,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446237468] [2021-12-22 14:02:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:26,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:02:26,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:02:26,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:02:26,282 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-22 14:02:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:26,345 INFO L93 Difference]: Finished difference Result 283 states and 351 transitions. [2021-12-22 14:02:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:02:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 177 [2021-12-22 14:02:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:26,347 INFO L225 Difference]: With dead ends: 283 [2021-12-22 14:02:26,347 INFO L226 Difference]: Without dead ends: 177 [2021-12-22 14:02:26,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:02:26,349 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:26,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 948 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-22 14:02:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-12-22 14:02:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-22 14:02:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2021-12-22 14:02:26,386 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 177 [2021-12-22 14:02:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:26,387 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2021-12-22 14:02:26,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-22 14:02:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2021-12-22 14:02:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 14:02:26,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:26,390 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:26,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-22 14:02:26,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:26,604 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1080671750, now seen corresponding path program 1 times [2021-12-22 14:02:26,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217708116] [2021-12-22 14:02:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:26,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:26,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:26,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485635193] [2021-12-22 14:02:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:26,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:26,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:26,668 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:26,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 14:02:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 14:02:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-22 14:02:27,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:27,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:27,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217708116] [2021-12-22 14:02:27,393 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485635193] [2021-12-22 14:02:27,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485635193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:27,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:27,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:02:27,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887341448] [2021-12-22 14:02:27,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:27,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:02:27,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:02:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:27,396 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:27,450 INFO L93 Difference]: Finished difference Result 293 states and 372 transitions. [2021-12-22 14:02:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:02:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-12-22 14:02:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:27,454 INFO L225 Difference]: With dead ends: 293 [2021-12-22 14:02:27,454 INFO L226 Difference]: Without dead ends: 181 [2021-12-22 14:02:27,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:02:27,455 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:27,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-22 14:02:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-12-22 14:02:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 124 states have internal predecessors, (143), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-22 14:02:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2021-12-22 14:02:27,472 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 179 [2021-12-22 14:02:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:27,473 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2021-12-22 14:02:27,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2021-12-22 14:02:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 14:02:27,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:27,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:27,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:27,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 14:02:27,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 712361510, now seen corresponding path program 1 times [2021-12-22 14:02:27,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:27,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83197795] [2021-12-22 14:02:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:27,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:27,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:27,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142568456] [2021-12-22 14:02:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:27,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:27,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:27,757 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:27,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 14:02:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:28,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 14:02:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:28,582 INFO L387 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 11 treesize of output 5 [2021-12-22 14:02:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 14:02:28,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:28,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83197795] [2021-12-22 14:02:28,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142568456] [2021-12-22 14:02:28,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142568456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:28,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:28,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 14:02:28,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657903616] [2021-12-22 14:02:28,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:28,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 14:02:28,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 14:02:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:02:28,698 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-22 14:02:29,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:29,021 INFO L93 Difference]: Finished difference Result 319 states and 401 transitions. [2021-12-22 14:02:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:02:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 179 [2021-12-22 14:02:29,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:29,023 INFO L225 Difference]: With dead ends: 319 [2021-12-22 14:02:29,023 INFO L226 Difference]: Without dead ends: 202 [2021-12-22 14:02:29,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:02:29,024 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 107 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:29,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1490 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:02:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-22 14:02:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2021-12-22 14:02:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 138 states have internal predecessors, (161), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 36 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-22 14:02:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 241 transitions. [2021-12-22 14:02:29,035 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 241 transitions. Word has length 179 [2021-12-22 14:02:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:29,036 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 241 transitions. [2021-12-22 14:02:29,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-22 14:02:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 241 transitions. [2021-12-22 14:02:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 14:02:29,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:29,038 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:29,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:29,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:29,251 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1965868264, now seen corresponding path program 1 times [2021-12-22 14:02:29,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:29,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830086407] [2021-12-22 14:02:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:29,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:29,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:29,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451114077] [2021-12-22 14:02:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:29,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:29,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:29,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 14:02:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 14:02:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:29,999 INFO L387 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 62 treesize of output 38 [2021-12-22 14:02:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 14:02:30,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:30,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830086407] [2021-12-22 14:02:30,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451114077] [2021-12-22 14:02:30,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451114077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:30,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:30,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:02:30,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484291627] [2021-12-22 14:02:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:30,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:02:30,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:02:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:02:30,148 INFO L87 Difference]: Start difference. First operand 192 states and 241 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:30,173 INFO L93 Difference]: Finished difference Result 307 states and 387 transitions. [2021-12-22 14:02:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:02:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-12-22 14:02:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:30,175 INFO L225 Difference]: With dead ends: 307 [2021-12-22 14:02:30,175 INFO L226 Difference]: Without dead ends: 198 [2021-12-22 14:02:30,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:02:30,177 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 4 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:30,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 789 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-22 14:02:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2021-12-22 14:02:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.1985294117647058) internal successors, (163), 139 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 37 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-22 14:02:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 243 transitions. [2021-12-22 14:02:30,189 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 243 transitions. Word has length 179 [2021-12-22 14:02:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:30,189 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 243 transitions. [2021-12-22 14:02:30,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 243 transitions. [2021-12-22 14:02:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-22 14:02:30,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:30,191 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:30,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:30,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 14:02:30,420 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254556, now seen corresponding path program 1 times [2021-12-22 14:02:30,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:30,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694781089] [2021-12-22 14:02:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:30,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:30,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:30,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041917007] [2021-12-22 14:02:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:30,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:30,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:30,484 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:30,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 14:02:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:31,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 14:02:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:31,162 INFO L387 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 62 treesize of output 38 [2021-12-22 14:02:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-22 14:02:31,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:31,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:31,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694781089] [2021-12-22 14:02:31,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:31,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041917007] [2021-12-22 14:02:31,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041917007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:31,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:31,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:02:31,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817818094] [2021-12-22 14:02:31,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:31,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:02:31,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:02:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:31,288 INFO L87 Difference]: Start difference. First operand 194 states and 243 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:31,303 INFO L93 Difference]: Finished difference Result 222 states and 276 transitions. [2021-12-22 14:02:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:02:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2021-12-22 14:02:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:31,305 INFO L225 Difference]: With dead ends: 222 [2021-12-22 14:02:31,305 INFO L226 Difference]: Without dead ends: 195 [2021-12-22 14:02:31,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:31,306 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:31,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 587 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-22 14:02:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-22 14:02:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 137 states have (on average 1.197080291970803) internal successors, (164), 139 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-22 14:02:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 244 transitions. [2021-12-22 14:02:31,317 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 244 transitions. Word has length 182 [2021-12-22 14:02:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:31,317 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 244 transitions. [2021-12-22 14:02:31,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 244 transitions. [2021-12-22 14:02:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-22 14:02:31,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:31,319 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:31,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:31,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 14:02:31,535 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:31,536 INFO L85 PathProgramCache]: Analyzing trace with hash -101731212, now seen corresponding path program 2 times [2021-12-22 14:02:31,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:31,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976068147] [2021-12-22 14:02:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:31,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:31,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:31,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738037543] [2021-12-22 14:02:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 14:02:31,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:31,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:31,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:31,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 14:02:32,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 14:02:32,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 14:02:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 14:02:32,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:32,321 INFO L387 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 62 treesize of output 38 [2021-12-22 14:02:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-22 14:02:32,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:32,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:32,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976068147] [2021-12-22 14:02:32,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:32,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738037543] [2021-12-22 14:02:32,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738037543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:32,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:32,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:02:32,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150528067] [2021-12-22 14:02:32,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:32,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:02:32,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:02:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:02:32,472 INFO L87 Difference]: Start difference. First operand 195 states and 244 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:32,507 INFO L93 Difference]: Finished difference Result 330 states and 410 transitions. [2021-12-22 14:02:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:02:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-22 14:02:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:32,510 INFO L225 Difference]: With dead ends: 330 [2021-12-22 14:02:32,510 INFO L226 Difference]: Without dead ends: 211 [2021-12-22 14:02:32,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:02:32,511 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 9 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:32,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 788 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-22 14:02:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2021-12-22 14:02:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 149 states have internal predecessors, (176), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-22 14:02:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 256 transitions. [2021-12-22 14:02:32,521 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 256 transitions. Word has length 185 [2021-12-22 14:02:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:32,522 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 256 transitions. [2021-12-22 14:02:32,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 256 transitions. [2021-12-22 14:02:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-22 14:02:32,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:32,524 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:32,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:32,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 14:02:32,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash 747347188, now seen corresponding path program 1 times [2021-12-22 14:02:32,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:32,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3680704] [2021-12-22 14:02:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:32,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:32,811 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:32,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696564234] [2021-12-22 14:02:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:32,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:32,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:32,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:02:32,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 14:02:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:02:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-22 14:02:33,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:33,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3680704] [2021-12-22 14:02:33,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696564234] [2021-12-22 14:02:33,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696564234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:33,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:33,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:02:33,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916704105] [2021-12-22 14:02:33,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:33,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:02:33,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:02:33,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:33,539 INFO L87 Difference]: Start difference. First operand 205 states and 256 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:33,567 INFO L93 Difference]: Finished difference Result 332 states and 412 transitions. [2021-12-22 14:02:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:02:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-22 14:02:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:33,569 INFO L225 Difference]: With dead ends: 332 [2021-12-22 14:02:33,569 INFO L226 Difference]: Without dead ends: 201 [2021-12-22 14:02:33,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:02:33,570 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:33,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 582 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-22 14:02:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2021-12-22 14:02:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 141 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-22 14:02:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2021-12-22 14:02:33,584 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 185 [2021-12-22 14:02:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:33,585 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2021-12-22 14:02:33,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2021-12-22 14:02:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-22 14:02:33,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:33,588 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:33,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-22 14:02:33,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 14:02:33,806 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 382427316, now seen corresponding path program 1 times [2021-12-22 14:02:33,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:33,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709577018] [2021-12-22 14:02:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:33,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:33,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565275091] [2021-12-22 14:02:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:33,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:33,864 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) [2021-12-22 14:02:33,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 14:02:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:02:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 14:02:34,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:02:34,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709577018] [2021-12-22 14:02:34,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565275091] [2021-12-22 14:02:34,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565275091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:02:34,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:02:34,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:02:34,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923892844] [2021-12-22 14:02:34,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:02:34,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:02:34,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:02:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:02:34,569 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:34,599 INFO L93 Difference]: Finished difference Result 347 states and 435 transitions. [2021-12-22 14:02:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:02:34,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-22 14:02:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:34,601 INFO L225 Difference]: With dead ends: 347 [2021-12-22 14:02:34,601 INFO L226 Difference]: Without dead ends: 197 [2021-12-22 14:02:34,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:02:34,602 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:34,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:02:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-22 14:02:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-12-22 14:02:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 141 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-22 14:02:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-12-22 14:02:34,612 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 185 [2021-12-22 14:02:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:34,612 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-12-22 14:02:34,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-22 14:02:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-12-22 14:02:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-22 14:02:34,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:34,614 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:34,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:34,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:34,827 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash -908019048, now seen corresponding path program 1 times [2021-12-22 14:02:34,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:34,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441048074] [2021-12-22 14:02:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:34,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:34,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205874086] [2021-12-22 14:02:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:34,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:34,885 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) [2021-12-22 14:02:34,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 14:02:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-22 14:02:35,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:35,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 14:02:35,874 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-22 14:02:35,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 14:02:37,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:02:37,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 14:02:40,712 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1772 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1772) |c_#memory_int|)) is different from true [2021-12-22 14:02:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 52 proven. 20 refuted. 2 times theorem prover too weak. 42 trivial. 3 not checked. [2021-12-22 14:02:42,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:42,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:42,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441048074] [2021-12-22 14:02:42,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:42,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205874086] [2021-12-22 14:02:42,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205874086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:42,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:02:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-22 14:02:42,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475945026] [2021-12-22 14:02:42,720 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:42,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 14:02:42,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 14:02:42,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=853, Unknown=41, NotChecked=60, Total=1056 [2021-12-22 14:02:42,721 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-22 14:02:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:43,842 INFO L93 Difference]: Finished difference Result 395 states and 495 transitions. [2021-12-22 14:02:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 14:02:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 187 [2021-12-22 14:02:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:43,844 INFO L225 Difference]: With dead ends: 395 [2021-12-22 14:02:43,844 INFO L226 Difference]: Without dead ends: 278 [2021-12-22 14:02:43,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=149, Invalid=1362, Unknown=53, NotChecked=76, Total=1640 [2021-12-22 14:02:43,846 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 96 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 3140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2095 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:43,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1807 Invalid, 3140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 981 Invalid, 0 Unknown, 2095 Unchecked, 0.7s Time] [2021-12-22 14:02:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-22 14:02:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2021-12-22 14:02:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 181 states have (on average 1.1657458563535912) internal successors, (211), 186 states have internal predecessors, (211), 40 states have call successors, (40), 22 states have call predecessors, (40), 29 states have return successors, (61), 43 states have call predecessors, (61), 39 states have call successors, (61) [2021-12-22 14:02:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 312 transitions. [2021-12-22 14:02:43,862 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 312 transitions. Word has length 187 [2021-12-22 14:02:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:43,863 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 312 transitions. [2021-12-22 14:02:43,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-22 14:02:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 312 transitions. [2021-12-22 14:02:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-22 14:02:43,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:43,865 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:44,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 14:02:44,094 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1925449391, now seen corresponding path program 1 times [2021-12-22 14:02:44,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:44,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280843436] [2021-12-22 14:02:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:44,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:44,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:44,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430037223] [2021-12-22 14:02:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:44,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:44,160 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) [2021-12-22 14:02:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 14:02:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:44,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-22 14:02:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:44,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 14:02:45,080 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-22 14:02:45,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 14:02:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:02:47,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 14:02:49,291 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1924 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1924) |c_#memory_int|)) is different from true [2021-12-22 14:02:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 51 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2021-12-22 14:02:49,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:50,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:50,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280843436] [2021-12-22 14:02:50,372 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:50,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430037223] [2021-12-22 14:02:50,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430037223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:50,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:02:50,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-22 14:02:50,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836782345] [2021-12-22 14:02:50,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:50,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 14:02:50,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 14:02:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=432, Unknown=5, NotChecked=42, Total=552 [2021-12-22 14:02:50,374 INFO L87 Difference]: Start difference. First operand 251 states and 312 transitions. Second operand has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-12-22 14:02:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:02:51,439 INFO L93 Difference]: Finished difference Result 481 states and 607 transitions. [2021-12-22 14:02:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 14:02:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 193 [2021-12-22 14:02:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:02:51,442 INFO L225 Difference]: With dead ends: 481 [2021-12-22 14:02:51,442 INFO L226 Difference]: Without dead ends: 347 [2021-12-22 14:02:51,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=121, Invalid=797, Unknown=16, NotChecked=58, Total=992 [2021-12-22 14:02:51,443 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 138 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:02:51,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1263 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1047 Invalid, 0 Unknown, 858 Unchecked, 0.8s Time] [2021-12-22 14:02:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-22 14:02:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 275. [2021-12-22 14:02:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 201 states have (on average 1.1741293532338308) internal successors, (236), 207 states have internal predecessors, (236), 41 states have call successors, (41), 23 states have call predecessors, (41), 32 states have return successors, (65), 45 states have call predecessors, (65), 40 states have call successors, (65) [2021-12-22 14:02:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2021-12-22 14:02:51,459 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 193 [2021-12-22 14:02:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:02:51,460 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2021-12-22 14:02:51,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-12-22 14:02:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2021-12-22 14:02:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-22 14:02:51,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:02:51,462 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:02:51,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 14:02:51,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:51,676 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:02:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:02:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1752761233, now seen corresponding path program 1 times [2021-12-22 14:02:51,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:02:51,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018018657] [2021-12-22 14:02:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:51,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:02:51,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:02:51,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251578048] [2021-12-22 14:02:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:02:51,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:02:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:02:51,736 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) [2021-12-22 14:02:51,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 14:02:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:02:52,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-22 14:02:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:02:52,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 14:02:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:02:52,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-22 14:02:52,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-12-22 14:02:52,837 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-22 14:02:52,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 14:02:52,916 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 14:02:52,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 14:02:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 14:02:54,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-22 14:02:57,762 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2086 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2086) |c_#memory_int|)) is different from true [2021-12-22 14:02:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 43 proven. 22 refuted. 2 times theorem prover too weak. 42 trivial. 3 not checked. [2021-12-22 14:02:59,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:02:59,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:02:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018018657] [2021-12-22 14:02:59,984 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:02:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251578048] [2021-12-22 14:02:59,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251578048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:02:59,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:02:59,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-12-22 14:02:59,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534578833] [2021-12-22 14:02:59,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 14:02:59,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-22 14:02:59,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:02:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-22 14:02:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1032, Unknown=45, NotChecked=66, Total=1260 [2021-12-22 14:02:59,987 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 35 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 14 states have call successors, (27), 8 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-22 14:03:00,561 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v___CPROVER_overflow_mult_~#c~1.base_117| Int) (v_ArrVal_2083 Int)) (and (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_117| v_ArrVal_2083)) (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_117|) 0))) (exists ((v_ArrVal_2086 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2086) |c_#memory_int|)) (exists ((v_ArrVal_2084 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2084)))) is different from true [2021-12-22 14:03:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:03:01,142 INFO L93 Difference]: Finished difference Result 471 states and 588 transitions. [2021-12-22 14:03:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 14:03:01,143 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 14 states have call successors, (27), 8 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 193 [2021-12-22 14:03:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:03:01,145 INFO L225 Difference]: With dead ends: 471 [2021-12-22 14:03:01,145 INFO L226 Difference]: Without dead ends: 339 [2021-12-22 14:03:01,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 226 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=167, Invalid=1590, Unknown=57, NotChecked=166, Total=1980 [2021-12-22 14:03:01,149 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 99 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2160 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:03:01,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 1872 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 917 Invalid, 0 Unknown, 2160 Unchecked, 0.7s Time] [2021-12-22 14:03:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-22 14:03:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 312. [2021-12-22 14:03:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 229 states have (on average 1.1746724890829694) internal successors, (269), 236 states have internal predecessors, (269), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (74), 50 states have call predecessors, (74), 44 states have call successors, (74) [2021-12-22 14:03:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 388 transitions. [2021-12-22 14:03:01,172 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 388 transitions. Word has length 193 [2021-12-22 14:03:01,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:03:01,173 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 388 transitions. [2021-12-22 14:03:01,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 3.935483870967742) internal successors, (122), 30 states have internal predecessors, (122), 14 states have call successors, (27), 8 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-22 14:03:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 388 transitions. [2021-12-22 14:03:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-22 14:03:01,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:03:01,175 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:03:01,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-22 14:03:01,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:03:01,404 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:03:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:03:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -16710381, now seen corresponding path program 1 times [2021-12-22 14:03:01,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:03:01,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513644485] [2021-12-22 14:03:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:03:01,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:03:01,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:03:01,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705747160] [2021-12-22 14:03:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:03:01,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:03:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:03:01,463 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) [2021-12-22 14:03:01,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 14:03:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:03:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 14:03:03,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:03:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-22 14:03:03,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:03:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-22 14:03:04,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:03:04,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513644485] [2021-12-22 14:03:04,081 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:03:04,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705747160] [2021-12-22 14:03:04,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705747160] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:03:04,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 14:03:04,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-22 14:03:04,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519853951] [2021-12-22 14:03:04,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 14:03:04,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 14:03:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:03:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 14:03:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:03:04,084 INFO L87 Difference]: Start difference. First operand 312 states and 388 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-12-22 14:03:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:03:04,233 INFO L93 Difference]: Finished difference Result 470 states and 604 transitions. [2021-12-22 14:03:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:03:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 193 [2021-12-22 14:03:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:03:04,236 INFO L225 Difference]: With dead ends: 470 [2021-12-22 14:03:04,236 INFO L226 Difference]: Without dead ends: 327 [2021-12-22 14:03:04,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:03:04,238 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 46 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:03:04,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 940 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:03:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-22 14:03:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 321. [2021-12-22 14:03:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 238 states have (on average 1.180672268907563) internal successors, (281), 245 states have internal predecessors, (281), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (74), 50 states have call predecessors, (74), 44 states have call successors, (74) [2021-12-22 14:03:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 400 transitions. [2021-12-22 14:03:04,256 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 400 transitions. Word has length 193 [2021-12-22 14:03:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:03:04,257 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 400 transitions. [2021-12-22 14:03:04,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-12-22 14:03:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 400 transitions. [2021-12-22 14:03:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-22 14:03:04,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:03:04,259 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:03:04,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-22 14:03:04,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:03:04,475 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:03:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:03:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1529453249, now seen corresponding path program 1 times [2021-12-22 14:03:04,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:03:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931286486] [2021-12-22 14:03:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:03:04,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:03:04,550 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:03:04,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692384911] [2021-12-22 14:03:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:03:04,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:03:04,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:03:04,552 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) [2021-12-22 14:03:04,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-22 14:03:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:03:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 2768 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 14:03:05,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:03:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-22 14:03:05,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:03:05,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:03:05,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931286486] [2021-12-22 14:03:05,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 14:03:05,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692384911] [2021-12-22 14:03:05,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692384911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:03:05,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:03:05,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 14:03:05,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253148258] [2021-12-22 14:03:05,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:03:05,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:03:05,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:03:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:03:05,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:03:05,455 INFO L87 Difference]: Start difference. First operand 321 states and 400 transitions. Second operand has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-22 14:03:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:03:05,696 INFO L93 Difference]: Finished difference Result 471 states and 585 transitions. [2021-12-22 14:03:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:03:05,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) Word has length 205 [2021-12-22 14:03:05,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:03:05,699 INFO L225 Difference]: With dead ends: 471 [2021-12-22 14:03:05,699 INFO L226 Difference]: Without dead ends: 319 [2021-12-22 14:03:05,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:03:05,700 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 233 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:03:05,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1091 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:03:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-22 14:03:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-12-22 14:03:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 237 states have (on average 1.1772151898734178) internal successors, (279), 243 states have internal predecessors, (279), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-22 14:03:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 397 transitions. [2021-12-22 14:03:05,716 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 397 transitions. Word has length 205 [2021-12-22 14:03:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:03:05,717 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 397 transitions. [2021-12-22 14:03:05,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-22 14:03:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 397 transitions. [2021-12-22 14:03:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-22 14:03:05,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:03:05,719 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:03:05,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-22 14:03:05,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:03:05,940 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:03:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:03:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2089690696, now seen corresponding path program 1 times [2021-12-22 14:03:05,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:03:05,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684099798] [2021-12-22 14:03:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:03:05,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:03:05,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 14:03:05,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864455116] [2021-12-22 14:03:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:03:05,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:03:05,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:03:05,999 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) [2021-12-22 14:03:06,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-22 14:03:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:03:06,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 14:03:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:03:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-22 14:03:06,871 INFO L328 TraceCheckSpWp]: Computing backward predicates...