./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 4d014703 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 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 13:50:02,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 13:50:02,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 13:50:02,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 13:50:02,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 13:50:02,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 13:50:02,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 13:50:02,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 13:50:02,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 13:50:02,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 13:50:02,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 13:50:02,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 13:50:02,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 13:50:02,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 13:50:02,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 13:50:02,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 13:50:02,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 13:50:02,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 13:50:02,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 13:50:02,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 13:50:02,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 13:50:02,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 13:50:02,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 13:50:02,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 13:50:02,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 13:50:02,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 13:50:02,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 13:50:02,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 13:50:02,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 13:50:02,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 13:50:02,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 13:50:02,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 13:50:02,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 13:50:02,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 13:50:02,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 13:50:02,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 13:50:02,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 13:50:02,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 13:50:02,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 13:50:02,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 13:50:02,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 13:50:02,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 13:50:02,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 13:50:02,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 13:50:02,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 13:50:02,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 13:50:02,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 13:50:02,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 13:50:02,191 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 13:50:02,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 13:50:02,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 13:50:02,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 13:50:02,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 13:50:02,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 13:50:02,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 13:50:02,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 13:50:02,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 13:50:02,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 13:50:02,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 13:50:02,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 13:50:02,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 13:50:02,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:50:02,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 13:50:02,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 13:50:02,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 13:50:02,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 13:50:02,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 13:50:02,194 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 13:50:02,194 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 13:50:02,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 13:50:02,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 13:50:02,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-11-02 13:50:02,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 13:50:02,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 13:50:02,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 13:50:02,418 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 13:50:02,419 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 13:50:02,420 INFO L432 ainManager$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 [2021-11-02 13:50:02,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d761f52/bd1e356b21ec41c69ab38b3779c83356/FLAG58cbb9d3e [2021-11-02 13:50:02,996 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 13:50:02,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-02 13:50:03,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d761f52/bd1e356b21ec41c69ab38b3779c83356/FLAG58cbb9d3e [2021-11-02 13:50:03,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d761f52/bd1e356b21ec41c69ab38b3779c83356 [2021-11-02 13:50:03,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 13:50:03,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 13:50:03,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 13:50:03,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 13:50:03,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 13:50:03,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:50:03" (1/1) ... [2021-11-02 13:50:03,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be5cb07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:03, skipping insertion in model container [2021-11-02 13:50:03,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 01:50:03" (1/1) ... [2021-11-02 13:50:03,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 13:50:03,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 13:50:03,744 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-02 13:50:03,749 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-02 13:50:03,760 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:50:03,762 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:50:04,249 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:50:04,300 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,303 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,303 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,304 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,305 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,317 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,317 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,319 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,320 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,506 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:50:04,507 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:50:04,507 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:50:04,510 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:50:04,511 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:50:04,513 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:50:04,515 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:50:04,516 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:50:04,516 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:50:04,516 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:50:04,603 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,609 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:50:04,670 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 13:50:04,687 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-02 13:50:04,688 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-02 13:50:04,690 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-02 13:50:04,690 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-02 13:50:04,718 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-02 13:50:04,724 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,725 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,725 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,725 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,725 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,728 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,729 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,729 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,729 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,746 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-02 13:50:04,747 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-02 13:50:04,748 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-02 13:50:04,748 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-02 13:50:04,749 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-02 13:50:04,749 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-02 13:50:04,749 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-02 13:50:04,749 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-02 13:50:04,750 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-02 13:50:04,750 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-02 13:50:04,766 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,766 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-02 13:50:04,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 13:50:04,930 INFO L208 MainTranslator]: Completed translation [2021-11-02 13:50:04,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04 WrapperNode [2021-11-02 13:50:04,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 13:50:04,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 13:50:04,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 13:50:04,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 13:50:04,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:04,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 13:50:05,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 13:50:05,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 13:50:05,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 13:50:05,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 13:50:05,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 13:50:05,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 13:50:05,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 13:50:05,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (1/1) ... [2021-11-02 13:50:05,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 13:50:05,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:05,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 13:50:05,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 13:50:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 13:50:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 13:50:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 13:50:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 13:50:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 13:50:05,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 13:50:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 13:50:05,210 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-02 13:50:05,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 13:50:05,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 13:50:05,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 13:50:05,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 13:50:09,194 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 13:50:09,195 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-02 13:50:09,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:50:09 BoogieIcfgContainer [2021-11-02 13:50:09,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 13:50:09,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 13:50:09,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 13:50:09,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 13:50:09,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 01:50:03" (1/3) ... [2021-11-02 13:50:09,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1f1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:50:09, skipping insertion in model container [2021-11-02 13:50:09,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 01:50:04" (2/3) ... [2021-11-02 13:50:09,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1f1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 01:50:09, skipping insertion in model container [2021-11-02 13:50:09,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 01:50:09" (3/3) ... [2021-11-02 13:50:09,202 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-11-02 13:50:09,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 13:50:09,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 13:50:09,241 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 13:50:09,250 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 13:50:09,250 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 13:50:09,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 190 states have (on average 1.4631578947368422) internal successors, (278), 192 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 13:50:09,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:09,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:09,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1087609144, now seen corresponding path program 1 times [2021-11-02 13:50:09,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:09,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995836109] [2021-11-02 13:50:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:09,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:09,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:09,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995836109] [2021-11-02 13:50:09,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995836109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:09,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:09,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 13:50:09,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425688478] [2021-11-02 13:50:09,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 13:50:09,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 13:50:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:50:09,857 INFO L87 Difference]: Start difference. First operand has 193 states, 190 states have (on average 1.4631578947368422) internal successors, (278), 192 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:11,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:12,629 INFO L93 Difference]: Finished difference Result 380 states and 549 transitions. [2021-11-02 13:50:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 13:50:12,631 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 13:50:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:12,637 INFO L225 Difference]: With dead ends: 380 [2021-11-02 13:50:12,637 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 13:50:12,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 13:50:12,640 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2405.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2715.85ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:12,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 250 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 2715.85ms Time] [2021-11-02 13:50:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 13:50:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-02 13:50:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3172043010752688) internal successors, (245), 187 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2021-11-02 13:50:12,669 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 45 [2021-11-02 13:50:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:12,669 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2021-11-02 13:50:12,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2021-11-02 13:50:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 13:50:12,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:12,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:12,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 13:50:12,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:12,672 INFO L85 PathProgramCache]: Analyzing trace with hash 339318222, now seen corresponding path program 1 times [2021-11-02 13:50:12,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:12,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118659106] [2021-11-02 13:50:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:12,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:12,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:12,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118659106] [2021-11-02 13:50:12,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118659106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:12,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:12,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:50:12,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566177007] [2021-11-02 13:50:12,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:50:12,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:50:12,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:50:12,886 INFO L87 Difference]: Start difference. First operand 188 states and 245 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:14,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:16,057 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2021-11-02 13:50:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 13:50:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 13:50:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:16,059 INFO L225 Difference]: With dead ends: 296 [2021-11-02 13:50:16,059 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 13:50:16,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.70ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:50:16,060 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 429 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2812.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3128.93ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:16,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 6.24ms Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 1 Unknown, 0 Unchecked, 3128.93ms Time] [2021-11-02 13:50:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 13:50:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-02 13:50:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3118279569892473) internal successors, (244), 187 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 244 transitions. [2021-11-02 13:50:16,073 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 244 transitions. Word has length 51 [2021-11-02 13:50:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:16,073 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 244 transitions. [2021-11-02 13:50:16,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 244 transitions. [2021-11-02 13:50:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 13:50:16,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:16,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:16,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 13:50:16,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:16,094 INFO L85 PathProgramCache]: Analyzing trace with hash 168473663, now seen corresponding path program 1 times [2021-11-02 13:50:16,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:16,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542004385] [2021-11-02 13:50:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:16,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:16,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:16,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542004385] [2021-11-02 13:50:16,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542004385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:16,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:16,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:50:16,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109307710] [2021-11-02 13:50:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:50:16,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:50:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:50:16,399 INFO L87 Difference]: Start difference. First operand 188 states and 244 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:18,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:20,132 INFO L93 Difference]: Finished difference Result 409 states and 532 transitions. [2021-11-02 13:50:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:50:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 13:50:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:20,134 INFO L225 Difference]: With dead ends: 409 [2021-11-02 13:50:20,134 INFO L226 Difference]: Without dead ends: 269 [2021-11-02 13:50:20,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.54ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:50:20,135 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 633 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3290.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3634.41ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:20,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 0 Invalid, 503 Unknown, 0 Unchecked, 9.27ms Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 1 Unknown, 0 Unchecked, 3634.41ms Time] [2021-11-02 13:50:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-02 13:50:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 188. [2021-11-02 13:50:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3064516129032258) internal successors, (243), 187 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2021-11-02 13:50:20,146 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 55 [2021-11-02 13:50:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:20,146 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2021-11-02 13:50:20,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2021-11-02 13:50:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 13:50:20,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:20,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:20,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 13:50:20,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -795727197, now seen corresponding path program 1 times [2021-11-02 13:50:20,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:20,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509466080] [2021-11-02 13:50:20,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:20,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:20,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:20,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858785791] [2021-11-02 13:50:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:20,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:20,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:50:20,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 13:50:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 13:50:20,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:21,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:50:21,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509466080] [2021-11-02 13:50:21,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858785791] [2021-11-02 13:50:21,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858785791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:21,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:21,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:50:21,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789256653] [2021-11-02 13:50:21,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:50:21,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:21,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:50:21,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:50:21,258 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:23,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:24,744 INFO L93 Difference]: Finished difference Result 297 states and 384 transitions. [2021-11-02 13:50:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:50:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 13:50:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:24,747 INFO L225 Difference]: With dead ends: 297 [2021-11-02 13:50:24,747 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 13:50:24,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 147.43ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:50:24,748 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 839 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2956.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3365.46ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:24,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 0 Invalid, 337 Unknown, 0 Unchecked, 5.60ms Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 1 Unknown, 0 Unchecked, 3365.46ms Time] [2021-11-02 13:50:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 13:50:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-02 13:50:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 187 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 242 transitions. [2021-11-02 13:50:24,757 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 242 transitions. Word has length 63 [2021-11-02 13:50:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:24,758 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 242 transitions. [2021-11-02 13:50:24,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 242 transitions. [2021-11-02 13:50:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 13:50:24,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:24,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:24,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 13:50:24,959 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 [2021-11-02 13:50:24,960 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1514601710, now seen corresponding path program 1 times [2021-11-02 13:50:24,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:24,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320252865] [2021-11-02 13:50:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:24,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:25,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:25,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947697567] [2021-11-02 13:50:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:25,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:25,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:25,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:50:25,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 13:50:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:25,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 13:50:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:26,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:50:26,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:26,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320252865] [2021-11-02 13:50:26,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:26,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947697567] [2021-11-02 13:50:26,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947697567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:26,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:26,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:50:26,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306930351] [2021-11-02 13:50:26,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:50:26,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:50:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:50:26,168 INFO L87 Difference]: Start difference. First operand 188 states and 242 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:28,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:30,566 INFO L93 Difference]: Finished difference Result 384 states and 496 transitions. [2021-11-02 13:50:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:50:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 13:50:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:30,568 INFO L225 Difference]: With dead ends: 384 [2021-11-02 13:50:30,568 INFO L226 Difference]: Without dead ends: 259 [2021-11-02 13:50:30,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 251.06ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-02 13:50:30,569 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1350 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3819.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.33ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4179.39ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:30,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 0 Invalid, 509 Unknown, 0 Unchecked, 8.33ms Time], IncrementalHoareTripleChecker [5 Valid, 503 Invalid, 1 Unknown, 0 Unchecked, 4179.39ms Time] [2021-11-02 13:50:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-02 13:50:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 188. [2021-11-02 13:50:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.2956989247311828) internal successors, (241), 187 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-11-02 13:50:30,577 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 75 [2021-11-02 13:50:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:30,578 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-11-02 13:50:30,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-11-02 13:50:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 13:50:30,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:30,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:30,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 13:50:30,807 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 [2021-11-02 13:50:30,808 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash 328015662, now seen corresponding path program 1 times [2021-11-02 13:50:30,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:30,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667222140] [2021-11-02 13:50:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:30,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:30,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:30,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901027719] [2021-11-02 13:50:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:30,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:30,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:50:30,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 13:50:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:31,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 13:50:31,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:31,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:50:31,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:31,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667222140] [2021-11-02 13:50:31,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:31,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901027719] [2021-11-02 13:50:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901027719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:31,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:31,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 13:50:31,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630583393] [2021-11-02 13:50:31,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 13:50:31,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 13:50:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:50:31,686 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:33,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:35,079 INFO L93 Difference]: Finished difference Result 257 states and 329 transitions. [2021-11-02 13:50:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 13:50:35,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-02 13:50:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:35,082 INFO L225 Difference]: With dead ends: 257 [2021-11-02 13:50:35,082 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 13:50:35,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.56ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:50:35,086 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3029.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3369.33ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:35,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 386 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [2 Valid, 383 Invalid, 1 Unknown, 0 Unchecked, 3369.33ms Time] [2021-11-02 13:50:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 13:50:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-02 13:50:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.2849462365591398) internal successors, (239), 187 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 239 transitions. [2021-11-02 13:50:35,095 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 239 transitions. Word has length 83 [2021-11-02 13:50:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:35,099 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 239 transitions. [2021-11-02 13:50:35,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:35,100 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 239 transitions. [2021-11-02 13:50:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 13:50:35,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:35,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:35,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 13:50:35,322 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 [2021-11-02 13:50:35,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1668120566, now seen corresponding path program 1 times [2021-11-02 13:50:35,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:35,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671121474] [2021-11-02 13:50:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:35,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:35,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:35,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582041101] [2021-11-02 13:50:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:35,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:35,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:35,383 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:50:35,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 13:50:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 13:50:35,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:36,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:50:36,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:36,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671121474] [2021-11-02 13:50:36,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:36,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582041101] [2021-11-02 13:50:36,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582041101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:36,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:36,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 13:50:36,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801893027] [2021-11-02 13:50:36,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 13:50:36,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 13:50:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:50:36,162 INFO L87 Difference]: Start difference. First operand 188 states and 239 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:38,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:39,734 INFO L93 Difference]: Finished difference Result 409 states and 522 transitions. [2021-11-02 13:50:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 13:50:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 13:50:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:39,735 INFO L225 Difference]: With dead ends: 409 [2021-11-02 13:50:39,736 INFO L226 Difference]: Without dead ends: 297 [2021-11-02 13:50:39,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.76ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 13:50:39,736 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3189.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.12ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3526.63ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:39,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 489 Unknown, 0 Unchecked, 4.12ms Time], IncrementalHoareTripleChecker [13 Valid, 475 Invalid, 1 Unknown, 0 Unchecked, 3526.63ms Time] [2021-11-02 13:50:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-02 13:50:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 194. [2021-11-02 13:50:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 193 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:39,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 245 transitions. [2021-11-02 13:50:39,743 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 245 transitions. Word has length 84 [2021-11-02 13:50:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:39,743 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 245 transitions. [2021-11-02 13:50:39,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 245 transitions. [2021-11-02 13:50:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 13:50:39,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:39,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:39,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 13:50:39,949 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 [2021-11-02 13:50:39,950 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1443531210, now seen corresponding path program 1 times [2021-11-02 13:50:39,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:39,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812620164] [2021-11-02 13:50:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:39,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:40,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:40,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006167095] [2021-11-02 13:50:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:40,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:40,024 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) [2021-11-02 13:50:40,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 13:50:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 2712 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 13:50:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:41,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:50:41,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:41,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812620164] [2021-11-02 13:50:41,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:41,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006167095] [2021-11-02 13:50:41,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006167095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:41,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:41,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:50:41,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048710845] [2021-11-02 13:50:41,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:50:41,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:50:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:50:41,014 INFO L87 Difference]: Start difference. First operand 194 states and 245 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:43,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:45,862 INFO L93 Difference]: Finished difference Result 374 states and 467 transitions. [2021-11-02 13:50:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 13:50:45,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 13:50:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:45,863 INFO L225 Difference]: With dead ends: 374 [2021-11-02 13:50:45,863 INFO L226 Difference]: Without dead ends: 285 [2021-11-02 13:50:45,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 309.50ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-02 13:50:45,864 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 450 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4147.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.90ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4565.85ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:45,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 0 Invalid, 1004 Unknown, 0 Unchecked, 8.90ms Time], IncrementalHoareTripleChecker [43 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 4565.85ms Time] [2021-11-02 13:50:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-02 13:50:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 198. [2021-11-02 13:50:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.2704081632653061) internal successors, (249), 197 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 249 transitions. [2021-11-02 13:50:45,871 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 249 transitions. Word has length 84 [2021-11-02 13:50:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:45,871 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 249 transitions. [2021-11-02 13:50:45,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 249 transitions. [2021-11-02 13:50:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 13:50:45,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:45,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:45,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 13:50:46,072 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 [2021-11-02 13:50:46,072 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1019691072, now seen corresponding path program 1 times [2021-11-02 13:50:46,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:46,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190808987] [2021-11-02 13:50:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:46,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:46,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:46,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598585565] [2021-11-02 13:50:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:46,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:46,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:46,121 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) [2021-11-02 13:50:46,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 13:50:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 13:50:46,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:47,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:50:47,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:47,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190808987] [2021-11-02 13:50:47,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:47,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598585565] [2021-11-02 13:50:47,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598585565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:47,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:47,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:50:47,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085545378] [2021-11-02 13:50:47,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:50:47,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:47,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:50:47,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:50:47,212 INFO L87 Difference]: Start difference. First operand 198 states and 249 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:49,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:51,388 INFO L93 Difference]: Finished difference Result 407 states and 503 transitions. [2021-11-02 13:50:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 13:50:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-02 13:50:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:51,391 INFO L225 Difference]: With dead ends: 407 [2021-11-02 13:50:51,391 INFO L226 Difference]: Without dead ends: 315 [2021-11-02 13:50:51,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 153.29ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:50:51,391 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 666 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3759.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.10ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4019.81ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:51,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 0 Invalid, 776 Unknown, 0 Unchecked, 10.10ms Time], IncrementalHoareTripleChecker [0 Valid, 775 Invalid, 1 Unknown, 0 Unchecked, 4019.81ms Time] [2021-11-02 13:50:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-02 13:50:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 198. [2021-11-02 13:50:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 197 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 248 transitions. [2021-11-02 13:50:51,399 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 248 transitions. Word has length 86 [2021-11-02 13:50:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:51,399 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 248 transitions. [2021-11-02 13:50:51,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 248 transitions. [2021-11-02 13:50:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 13:50:51,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:51,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:51,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 13:50:51,619 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 [2021-11-02 13:50:51,619 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash 460043484, now seen corresponding path program 1 times [2021-11-02 13:50:51,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:51,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496639258] [2021-11-02 13:50:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:51,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:51,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:51,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934002838] [2021-11-02 13:50:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:51,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:51,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:51,669 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) [2021-11-02 13:50:51,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 13:50:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 13:50:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:52,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:50:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:52,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:52,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496639258] [2021-11-02 13:50:52,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:52,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934002838] [2021-11-02 13:50:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934002838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:50:52,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 13:50:52,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 13:50:52,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673088500] [2021-11-02 13:50:52,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:50:52,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:50:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:50:52,768 INFO L87 Difference]: Start difference. First operand 198 states and 248 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:54,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:50:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:50:57,779 INFO L93 Difference]: Finished difference Result 733 states and 916 transitions. [2021-11-02 13:50:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:50:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-02 13:50:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:50:57,782 INFO L225 Difference]: With dead ends: 733 [2021-11-02 13:50:57,782 INFO L226 Difference]: Without dead ends: 612 [2021-11-02 13:50:57,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.42ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:50:57,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 964 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4409.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.36ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4904.48ms IncrementalHoareTripleChecker+Time [2021-11-02 13:50:57,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 0 Invalid, 941 Unknown, 0 Unchecked, 9.36ms Time], IncrementalHoareTripleChecker [104 Valid, 836 Invalid, 1 Unknown, 0 Unchecked, 4904.48ms Time] [2021-11-02 13:50:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-02 13:50:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 252. [2021-11-02 13:50:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 250 states have (on average 1.28) internal successors, (320), 251 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 320 transitions. [2021-11-02 13:50:57,794 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 320 transitions. Word has length 87 [2021-11-02 13:50:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:50:57,794 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 320 transitions. [2021-11-02 13:50:57,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:50:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 320 transitions. [2021-11-02 13:50:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 13:50:57,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:50:57,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:50:57,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 13:50:58,022 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 [2021-11-02 13:50:58,022 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:50:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:50:58,023 INFO L85 PathProgramCache]: Analyzing trace with hash -328094300, now seen corresponding path program 1 times [2021-11-02 13:50:58,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:50:58,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746728967] [2021-11-02 13:50:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:58,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:50:58,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:50:58,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179462560] [2021-11-02 13:50:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:50:58,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:50:58,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:50:58,092 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) [2021-11-02 13:50:58,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 13:50:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:50:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 2824 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 13:50:58,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:50:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:50:58,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:50:58,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:50:58,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746728967] [2021-11-02 13:50:58,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:50:58,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179462560] [2021-11-02 13:50:58,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179462560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:50:58,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:50:58,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:50:58,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273192062] [2021-11-02 13:50:58,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:50:58,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:50:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:50:58,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:50:58,923 INFO L87 Difference]: Start difference. First operand 252 states and 320 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:01,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:51:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:51:03,993 INFO L93 Difference]: Finished difference Result 377 states and 471 transitions. [2021-11-02 13:51:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:51:03,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 13:51:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:51:03,995 INFO L225 Difference]: With dead ends: 377 [2021-11-02 13:51:03,995 INFO L226 Difference]: Without dead ends: 339 [2021-11-02 13:51:03,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.53ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:51:03,996 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4524.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.54ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4969.90ms IncrementalHoareTripleChecker+Time [2021-11-02 13:51:03,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 933 Unknown, 0 Unchecked, 5.54ms Time], IncrementalHoareTripleChecker [7 Valid, 925 Invalid, 1 Unknown, 0 Unchecked, 4969.90ms Time] [2021-11-02 13:51:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-02 13:51:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 254. [2021-11-02 13:51:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.2777777777777777) internal successors, (322), 253 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 322 transitions. [2021-11-02 13:51:04,006 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 322 transitions. Word has length 94 [2021-11-02 13:51:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:51:04,006 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 322 transitions. [2021-11-02 13:51:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 322 transitions. [2021-11-02 13:51:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-02 13:51:04,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:51:04,007 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:51:04,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 13:51:04,223 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 [2021-11-02 13:51:04,224 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:51:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:51:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash 408461870, now seen corresponding path program 1 times [2021-11-02 13:51:04,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:51:04,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423121415] [2021-11-02 13:51:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:04,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:51:04,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:51:04,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798192897] [2021-11-02 13:51:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:04,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:51:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:51:04,288 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) [2021-11-02 13:51:04,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 13:51:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:51:04,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 2849 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 13:51:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:51:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:51:05,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 13:51:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:51:05,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:51:05,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423121415] [2021-11-02 13:51:05,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:51:05,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798192897] [2021-11-02 13:51:05,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798192897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 13:51:05,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 13:51:05,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-02 13:51:05,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397829257] [2021-11-02 13:51:05,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 13:51:05,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:51:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 13:51:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 13:51:05,694 INFO L87 Difference]: Start difference. First operand 254 states and 322 transitions. Second operand has 12 states, 12 states have (on average 10.0) internal successors, (120), 12 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:07,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:51:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:51:13,291 INFO L93 Difference]: Finished difference Result 1434 states and 1778 transitions. [2021-11-02 13:51:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 13:51:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.0) internal successors, (120), 12 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-02 13:51:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:51:13,295 INFO L225 Difference]: With dead ends: 1434 [2021-11-02 13:51:13,295 INFO L226 Difference]: Without dead ends: 1266 [2021-11-02 13:51:13,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 243.94ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 13:51:13,296 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2508 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 210 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6689.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2508 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.07ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7377.42ms IncrementalHoareTripleChecker+Time [2021-11-02 13:51:13,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2508 Valid, 0 Invalid, 2018 Unknown, 0 Unchecked, 16.07ms Time], IncrementalHoareTripleChecker [210 Valid, 1807 Invalid, 1 Unknown, 0 Unchecked, 7377.42ms Time] [2021-11-02 13:51:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-11-02 13:51:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 362. [2021-11-02 13:51:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.2944444444444445) internal successors, (466), 361 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 466 transitions. [2021-11-02 13:51:13,311 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 466 transitions. Word has length 106 [2021-11-02 13:51:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:51:13,312 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 466 transitions. [2021-11-02 13:51:13,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.0) internal successors, (120), 12 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 466 transitions. [2021-11-02 13:51:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-02 13:51:13,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:51:13,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:51:13,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 13:51:13,534 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 [2021-11-02 13:51:13,534 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:51:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:51:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1105040228, now seen corresponding path program 1 times [2021-11-02 13:51:13,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:51:13,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228047530] [2021-11-02 13:51:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:13,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:51:13,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:51:13,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438875072] [2021-11-02 13:51:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:13,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:51:13,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:51:13,602 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) [2021-11-02 13:51:13,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 13:51:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:51:14,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 13:51:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:51:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:51:14,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:51:14,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:51:14,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228047530] [2021-11-02 13:51:14,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:51:14,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438875072] [2021-11-02 13:51:14,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438875072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:51:14,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:51:14,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:51:14,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352237830] [2021-11-02 13:51:14,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:51:14,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:51:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:51:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:51:14,956 INFO L87 Difference]: Start difference. First operand 362 states and 466 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:17,473 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:51:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:51:19,628 INFO L93 Difference]: Finished difference Result 644 states and 826 transitions. [2021-11-02 13:51:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:51:19,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-02 13:51:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:51:19,631 INFO L225 Difference]: With dead ends: 644 [2021-11-02 13:51:19,631 INFO L226 Difference]: Without dead ends: 549 [2021-11-02 13:51:19,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 188.83ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:51:19,631 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1092 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4070.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.50ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4529.64ms IncrementalHoareTripleChecker+Time [2021-11-02 13:51:19,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1092 Valid, 0 Invalid, 652 Unknown, 0 Unchecked, 5.50ms Time], IncrementalHoareTripleChecker [13 Valid, 638 Invalid, 1 Unknown, 0 Unchecked, 4529.64ms Time] [2021-11-02 13:51:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-02 13:51:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 362. [2021-11-02 13:51:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.2916666666666667) internal successors, (465), 361 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 465 transitions. [2021-11-02 13:51:19,647 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 465 transitions. Word has length 113 [2021-11-02 13:51:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:51:19,647 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 465 transitions. [2021-11-02 13:51:19,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 465 transitions. [2021-11-02 13:51:19,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 13:51:19,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:51:19,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:51:19,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 13:51:19,865 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 [2021-11-02 13:51:19,865 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:51:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:51:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2020906040, now seen corresponding path program 1 times [2021-11-02 13:51:19,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:51:19,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339295683] [2021-11-02 13:51:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:19,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:51:19,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:51:19,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259662860] [2021-11-02 13:51:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:19,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:51:19,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:51:19,920 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) [2021-11-02 13:51:19,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 13:51:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:51:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 13:51:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:51:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:51:20,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:51:20,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:51:20,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339295683] [2021-11-02 13:51:20,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:51:20,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259662860] [2021-11-02 13:51:20,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259662860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:51:20,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:51:20,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:51:20,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140710875] [2021-11-02 13:51:20,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:51:20,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:51:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:51:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:51:20,966 INFO L87 Difference]: Start difference. First operand 362 states and 465 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:23,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:51:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:51:27,162 INFO L93 Difference]: Finished difference Result 913 states and 1176 transitions. [2021-11-02 13:51:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:51:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-02 13:51:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:51:27,165 INFO L225 Difference]: With dead ends: 913 [2021-11-02 13:51:27,165 INFO L226 Difference]: Without dead ends: 657 [2021-11-02 13:51:27,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.05ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:51:27,166 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5573.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6091.90ms IncrementalHoareTripleChecker+Time [2021-11-02 13:51:27,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 1352 Unknown, 0 Unchecked, 8.93ms Time], IncrementalHoareTripleChecker [1 Valid, 1350 Invalid, 1 Unknown, 0 Unchecked, 6091.90ms Time] [2021-11-02 13:51:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-02 13:51:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 368. [2021-11-02 13:51:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 366 states have (on average 1.2923497267759563) internal successors, (473), 367 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 473 transitions. [2021-11-02 13:51:27,184 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 473 transitions. Word has length 121 [2021-11-02 13:51:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:51:27,184 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 473 transitions. [2021-11-02 13:51:27,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 473 transitions. [2021-11-02 13:51:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 13:51:27,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:51:27,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:51:27,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 13:51:27,407 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 [2021-11-02 13:51:27,408 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:51:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:51:27,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1993840438, now seen corresponding path program 1 times [2021-11-02 13:51:27,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:51:27,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580821646] [2021-11-02 13:51:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:27,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:51:27,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:51:27,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754387930] [2021-11-02 13:51:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:27,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:51:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:51:27,472 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) [2021-11-02 13:51:27,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 13:51:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:51:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 3050 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 13:51:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:51:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:51:28,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:51:28,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:51:28,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580821646] [2021-11-02 13:51:28,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:51:28,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754387930] [2021-11-02 13:51:28,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754387930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:51:28,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:51:28,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 13:51:28,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885191965] [2021-11-02 13:51:28,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 13:51:28,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:51:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 13:51:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 13:51:28,740 INFO L87 Difference]: Start difference. First operand 368 states and 473 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:30,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:51:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:51:35,839 INFO L93 Difference]: Finished difference Result 963 states and 1244 transitions. [2021-11-02 13:51:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:51:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-02 13:51:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:51:35,842 INFO L225 Difference]: With dead ends: 963 [2021-11-02 13:51:35,842 INFO L226 Difference]: Without dead ends: 670 [2021-11-02 13:51:35,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 337.79ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 13:51:35,843 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 152 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6215.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.77ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6801.15ms IncrementalHoareTripleChecker+Time [2021-11-02 13:51:35,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 0 Invalid, 1717 Unknown, 0 Unchecked, 13.77ms Time], IncrementalHoareTripleChecker [3 Valid, 1713 Invalid, 1 Unknown, 0 Unchecked, 6801.15ms Time] [2021-11-02 13:51:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-02 13:51:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 372. [2021-11-02 13:51:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 370 states have (on average 1.2918918918918918) internal successors, (478), 371 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 478 transitions. [2021-11-02 13:51:35,862 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 478 transitions. Word has length 121 [2021-11-02 13:51:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:51:35,862 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 478 transitions. [2021-11-02 13:51:35,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 478 transitions. [2021-11-02 13:51:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 13:51:35,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:51:35,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:51:35,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 13:51:36,083 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 [2021-11-02 13:51:36,084 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:51:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:51:36,084 INFO L85 PathProgramCache]: Analyzing trace with hash -567022408, now seen corresponding path program 1 times [2021-11-02 13:51:36,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:51:36,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787408539] [2021-11-02 13:51:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:36,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:51:36,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:51:36,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193197011] [2021-11-02 13:51:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:36,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:51:36,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:51:36,172 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) [2021-11-02 13:51:36,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 13:51:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:51:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 13:51:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:51:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:51:37,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:51:37,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:51:37,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787408539] [2021-11-02 13:51:37,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:51:37,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193197011] [2021-11-02 13:51:37,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193197011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:51:37,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:51:37,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:51:37,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355701404] [2021-11-02 13:51:37,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:51:37,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:51:37,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:51:37,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:51:37,187 INFO L87 Difference]: Start difference. First operand 372 states and 478 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:39,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:51:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:51:42,214 INFO L93 Difference]: Finished difference Result 673 states and 866 transitions. [2021-11-02 13:51:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:51:42,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-02 13:51:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:51:42,215 INFO L225 Difference]: With dead ends: 673 [2021-11-02 13:51:42,215 INFO L226 Difference]: Without dead ends: 380 [2021-11-02 13:51:42,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.29ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:51:42,216 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4447.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4963.92ms IncrementalHoareTripleChecker+Time [2021-11-02 13:51:42,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 716 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [1 Valid, 714 Invalid, 1 Unknown, 0 Unchecked, 4963.92ms Time] [2021-11-02 13:51:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-02 13:51:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 376. [2021-11-02 13:51:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 374 states have (on average 1.2887700534759359) internal successors, (482), 375 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 482 transitions. [2021-11-02 13:51:42,232 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 482 transitions. Word has length 121 [2021-11-02 13:51:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:51:42,233 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 482 transitions. [2021-11-02 13:51:42,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 482 transitions. [2021-11-02 13:51:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 13:51:42,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:51:42,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:51:42,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 13:51:42,455 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 [2021-11-02 13:51:42,455 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:51:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:51:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1816902330, now seen corresponding path program 1 times [2021-11-02 13:51:42,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:51:42,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212788561] [2021-11-02 13:51:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:42,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:51:42,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:51:42,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678088045] [2021-11-02 13:51:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:51:42,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:51:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:51:42,511 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) [2021-11-02 13:51:42,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 13:51:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:51:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 3042 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 13:51:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:51:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:51:44,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:51:44,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:51:44,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212788561] [2021-11-02 13:51:44,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:51:44,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678088045] [2021-11-02 13:51:44,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678088045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:51:44,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:51:44,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 13:51:44,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418253453] [2021-11-02 13:51:44,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 13:51:44,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:51:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 13:51:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-02 13:51:44,558 INFO L87 Difference]: Start difference. First operand 376 states and 482 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:51:47,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:52:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:52:00,126 INFO L93 Difference]: Finished difference Result 1799 states and 2315 transitions. [2021-11-02 13:52:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 13:52:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-02 13:52:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:52:00,130 INFO L225 Difference]: With dead ends: 1799 [2021-11-02 13:52:00,130 INFO L226 Difference]: Without dead ends: 1543 [2021-11-02 13:52:00,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1784.82ms TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-11-02 13:52:00,131 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1148 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 4604 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12934.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.42ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4604 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13985.82ms IncrementalHoareTripleChecker+Time [2021-11-02 13:52:00,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 0 Invalid, 4623 Unknown, 0 Unchecked, 34.42ms Time], IncrementalHoareTripleChecker [18 Valid, 4604 Invalid, 1 Unknown, 0 Unchecked, 13985.82ms Time] [2021-11-02 13:52:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-11-02 13:52:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 387. [2021-11-02 13:52:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 385 states have (on average 1.290909090909091) internal successors, (497), 386 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 497 transitions. [2021-11-02 13:52:00,152 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 497 transitions. Word has length 121 [2021-11-02 13:52:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:52:00,152 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 497 transitions. [2021-11-02 13:52:00,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 497 transitions. [2021-11-02 13:52:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 13:52:00,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:52:00,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:52:00,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 13:52:00,367 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 [2021-11-02 13:52:00,368 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:52:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:52:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash -62228616, now seen corresponding path program 1 times [2021-11-02 13:52:00,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:52:00,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155382466] [2021-11-02 13:52:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:00,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:52:00,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:52:00,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062189614] [2021-11-02 13:52:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:00,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:52:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:52:00,426 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) [2021-11-02 13:52:00,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 13:52:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:52:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 13:52:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:52:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:52:01,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:52:01,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:52:01,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155382466] [2021-11-02 13:52:01,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:52:01,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062189614] [2021-11-02 13:52:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062189614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:52:01,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:52:01,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:52:01,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303002051] [2021-11-02 13:52:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:52:01,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:52:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:52:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:52:01,506 INFO L87 Difference]: Start difference. First operand 387 states and 497 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:04,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:52:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:52:06,987 INFO L93 Difference]: Finished difference Result 745 states and 962 transitions. [2021-11-02 13:52:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:52:06,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-02 13:52:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:52:06,989 INFO L225 Difference]: With dead ends: 745 [2021-11-02 13:52:06,989 INFO L226 Difference]: Without dead ends: 405 [2021-11-02 13:52:06,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.89ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:52:06,990 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4858.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.27ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5400.93ms IncrementalHoareTripleChecker+Time [2021-11-02 13:52:06,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 742 Unknown, 0 Unchecked, 4.27ms Time], IncrementalHoareTripleChecker [13 Valid, 728 Invalid, 1 Unknown, 0 Unchecked, 5400.93ms Time] [2021-11-02 13:52:06,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-02 13:52:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 393. [2021-11-02 13:52:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 391 states have (on average 1.2838874680306904) internal successors, (502), 392 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 502 transitions. [2021-11-02 13:52:07,033 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 502 transitions. Word has length 121 [2021-11-02 13:52:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:52:07,034 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 502 transitions. [2021-11-02 13:52:07,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 502 transitions. [2021-11-02 13:52:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 13:52:07,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:52:07,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:52:07,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 13:52:07,255 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 [2021-11-02 13:52:07,255 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:52:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:52:07,256 INFO L85 PathProgramCache]: Analyzing trace with hash -303638572, now seen corresponding path program 1 times [2021-11-02 13:52:07,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:52:07,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090457288] [2021-11-02 13:52:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:07,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:52:07,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:52:07,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877856819] [2021-11-02 13:52:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:07,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:52:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:52:07,320 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) [2021-11-02 13:52:07,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 13:52:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:52:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-02 13:52:08,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:52:09,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 13:52:09,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 13:52:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 13:52:10,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 13:52:10,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-02 13:52:10,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-11-02 13:52:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:52:10,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:52:10,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:52:10,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090457288] [2021-11-02 13:52:10,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:52:10,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877856819] [2021-11-02 13:52:10,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877856819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:52:10,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:52:10,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-02 13:52:10,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980895227] [2021-11-02 13:52:10,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 13:52:10,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:52:10,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 13:52:10,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-02 13:52:10,621 INFO L87 Difference]: Start difference. First operand 393 states and 502 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:12,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:52:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:52:26,761 INFO L93 Difference]: Finished difference Result 1433 states and 1837 transitions. [2021-11-02 13:52:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 13:52:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 13:52:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:52:26,765 INFO L225 Difference]: With dead ends: 1433 [2021-11-02 13:52:26,765 INFO L226 Difference]: Without dead ends: 1337 [2021-11-02 13:52:26,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 3791.25ms TimeCoverageRelationStatistics Valid=389, Invalid=1417, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 13:52:26,766 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2112 mSDsluCounter, 3130 mSDsCounter, 0 mSdLazyCounter, 4514 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11804.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.29ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 4514 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12753.41ms IncrementalHoareTripleChecker+Time [2021-11-02 13:52:26,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2112 Valid, 0 Invalid, 4587 Unknown, 0 Unchecked, 33.29ms Time], IncrementalHoareTripleChecker [72 Valid, 4514 Invalid, 1 Unknown, 0 Unchecked, 12753.41ms Time] [2021-11-02 13:52:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-11-02 13:52:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 610. [2021-11-02 13:52:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 608 states have (on average 1.2911184210526316) internal successors, (785), 609 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 785 transitions. [2021-11-02 13:52:26,803 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 785 transitions. Word has length 123 [2021-11-02 13:52:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:52:26,803 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 785 transitions. [2021-11-02 13:52:26,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 785 transitions. [2021-11-02 13:52:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 13:52:26,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:52:26,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:52:26,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 13:52:27,027 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 [2021-11-02 13:52:27,027 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:52:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:52:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2032753938, now seen corresponding path program 1 times [2021-11-02 13:52:27,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:52:27,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542818706] [2021-11-02 13:52:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:27,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:52:27,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:52:27,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586548622] [2021-11-02 13:52:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:27,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:52:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:52:27,096 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) [2021-11-02 13:52:27,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 13:52:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:52:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 3042 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 13:52:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:52:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:52:28,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:52:28,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:52:28,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542818706] [2021-11-02 13:52:28,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:52:28,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586548622] [2021-11-02 13:52:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586548622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:52:28,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:52:28,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 13:52:28,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194310109] [2021-11-02 13:52:28,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 13:52:28,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:52:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 13:52:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:52:28,194 INFO L87 Difference]: Start difference. First operand 610 states and 785 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:31,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:52:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:52:35,988 INFO L93 Difference]: Finished difference Result 1550 states and 2000 transitions. [2021-11-02 13:52:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 13:52:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 13:52:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:52:35,992 INFO L225 Difference]: With dead ends: 1550 [2021-11-02 13:52:35,992 INFO L226 Difference]: Without dead ends: 988 [2021-11-02 13:52:35,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 179.81ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:52:35,993 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6645.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.53ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7556.49ms IncrementalHoareTripleChecker+Time [2021-11-02 13:52:35,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 1380 Unknown, 0 Unchecked, 8.53ms Time], IncrementalHoareTripleChecker [24 Valid, 1355 Invalid, 1 Unknown, 0 Unchecked, 7556.49ms Time] [2021-11-02 13:52:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-11-02 13:52:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 616. [2021-11-02 13:52:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 614 states have (on average 1.286644951140065) internal successors, (790), 615 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 790 transitions. [2021-11-02 13:52:36,033 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 790 transitions. Word has length 123 [2021-11-02 13:52:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:52:36,033 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 790 transitions. [2021-11-02 13:52:36,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 790 transitions. [2021-11-02 13:52:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 13:52:36,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:52:36,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:52:36,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-02 13:52:36,255 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 [2021-11-02 13:52:36,256 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:52:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:52:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash -937357164, now seen corresponding path program 1 times [2021-11-02 13:52:36,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:52:36,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200183948] [2021-11-02 13:52:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:36,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:52:36,307 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:52:36,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710374582] [2021-11-02 13:52:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:52:36,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:52:36,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:52:36,308 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) [2021-11-02 13:52:36,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 13:52:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:52:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-02 13:52:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:52:40,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 13:52:40,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 13:52:41,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 13:52:41,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 13:52:41,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-02 13:52:41,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-02 13:52:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:52:41,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:52:41,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:52:41,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200183948] [2021-11-02 13:52:41,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:52:41,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710374582] [2021-11-02 13:52:41,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710374582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:52:41,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:52:41,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-02 13:52:41,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641216221] [2021-11-02 13:52:41,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 13:52:41,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:52:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 13:52:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-02 13:52:41,713 INFO L87 Difference]: Start difference. First operand 616 states and 790 transitions. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 19 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:52:44,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:53:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:53:14,562 INFO L93 Difference]: Finished difference Result 2556 states and 3265 transitions. [2021-11-02 13:53:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 13:53:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 19 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 13:53:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:53:14,568 INFO L225 Difference]: With dead ends: 2556 [2021-11-02 13:53:14,568 INFO L226 Difference]: Without dead ends: 2473 [2021-11-02 13:53:14,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 12284.33ms TimeCoverageRelationStatistics Valid=850, Invalid=3182, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 13:53:14,570 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2393 mSDsluCounter, 4065 mSDsCounter, 0 mSdLazyCounter, 5874 mSolverCounterSat, 195 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19573.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.86ms SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 5874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21423.91ms IncrementalHoareTripleChecker+Time [2021-11-02 13:53:14,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2393 Valid, 0 Invalid, 6070 Unknown, 0 Unchecked, 57.86ms Time], IncrementalHoareTripleChecker [195 Valid, 5874 Invalid, 1 Unknown, 0 Unchecked, 21423.91ms Time] [2021-11-02 13:53:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-11-02 13:53:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1046. [2021-11-02 13:53:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1044 states have (on average 1.2883141762452108) internal successors, (1345), 1045 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:53:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1345 transitions. [2021-11-02 13:53:14,644 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1345 transitions. Word has length 123 [2021-11-02 13:53:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:53:14,644 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1345 transitions. [2021-11-02 13:53:14,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 19 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:53:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1345 transitions. [2021-11-02 13:53:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 13:53:14,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:53:14,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:53:14,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 13:53:14,859 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 [2021-11-02 13:53:14,859 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:53:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:53:14,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1958425518, now seen corresponding path program 1 times [2021-11-02 13:53:14,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:53:14,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207049250] [2021-11-02 13:53:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:53:14,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:53:14,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:53:14,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175941473] [2021-11-02 13:53:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:53:14,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:53:14,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:53:14,912 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) [2021-11-02 13:53:14,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 13:53:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:53:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 3042 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-02 13:53:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:53:15,668 INFO L388 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 [2021-11-02 13:53:16,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:16,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 13:53:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:16,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 13:53:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:16,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 13:53:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:16,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 13:53:17,250 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 13:53:17,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 13:53:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:17,450 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-02 13:53:17,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 58 [2021-11-02 13:53:17,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:17,516 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-02 13:53:17,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 43 [2021-11-02 13:53:18,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:18,475 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-02 13:53:18,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 58 [2021-11-02 13:53:18,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:53:18,539 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-02 13:53:18,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 47 [2021-11-02 13:53:18,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-02 13:53:18,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-02 13:53:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:53:19,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:53:19,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:53:19,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207049250] [2021-11-02 13:53:19,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:53:19,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175941473] [2021-11-02 13:53:19,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175941473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:53:19,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:53:19,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-02 13:53:19,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369705705] [2021-11-02 13:53:19,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 13:53:19,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:53:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 13:53:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-02 13:53:19,498 INFO L87 Difference]: Start difference. First operand 1046 states and 1345 transitions. Second operand has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:53:22,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:54:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:54:02,674 INFO L93 Difference]: Finished difference Result 4110 states and 5309 transitions. [2021-11-02 13:54:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 13:54:02,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 13:54:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:54:02,682 INFO L225 Difference]: With dead ends: 4110 [2021-11-02 13:54:02,682 INFO L226 Difference]: Without dead ends: 3490 [2021-11-02 13:54:02,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 4841.89ms TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 13:54:02,684 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 984 mSDsluCounter, 8195 mSDsCounter, 0 mSdLazyCounter, 11165 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35542.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 101.68ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 11165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39052.13ms IncrementalHoareTripleChecker+Time [2021-11-02 13:54:02,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 0 Invalid, 11201 Unknown, 0 Unchecked, 101.68ms Time], IncrementalHoareTripleChecker [35 Valid, 11165 Invalid, 1 Unknown, 0 Unchecked, 39052.13ms Time] [2021-11-02 13:54:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-11-02 13:54:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 1089. [2021-11-02 13:54:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1087 states have (on average 1.2842686292548298) internal successors, (1396), 1088 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1396 transitions. [2021-11-02 13:54:02,767 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1396 transitions. Word has length 123 [2021-11-02 13:54:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:54:02,767 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1396 transitions. [2021-11-02 13:54:02,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1396 transitions. [2021-11-02 13:54:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 13:54:02,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:54:02,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:54:02,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 13:54:02,987 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 [2021-11-02 13:54:02,987 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:54:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:54:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -520179310, now seen corresponding path program 1 times [2021-11-02 13:54:02,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:54:02,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933651948] [2021-11-02 13:54:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:54:03,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:54:03,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850435774] [2021-11-02 13:54:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:03,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:54:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:54:03,052 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) [2021-11-02 13:54:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 13:54:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:54:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 3052 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 13:54:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:54:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:54:04,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:54:04,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:54:04,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933651948] [2021-11-02 13:54:04,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:54:04,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850435774] [2021-11-02 13:54:04,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850435774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:54:04,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:54:04,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 13:54:04,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656264422] [2021-11-02 13:54:04,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 13:54:04,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:54:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 13:54:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 13:54:04,138 INFO L87 Difference]: Start difference. First operand 1089 states and 1396 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:07,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:54:09,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:54:09,595 INFO L93 Difference]: Finished difference Result 1591 states and 2042 transitions. [2021-11-02 13:54:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 13:54:09,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 13:54:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:54:09,598 INFO L225 Difference]: With dead ends: 1591 [2021-11-02 13:54:09,598 INFO L226 Difference]: Without dead ends: 1079 [2021-11-02 13:54:09,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.39ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 13:54:09,599 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4633.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5326.06ms IncrementalHoareTripleChecker+Time [2021-11-02 13:54:09,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 713 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [1 Valid, 711 Invalid, 1 Unknown, 0 Unchecked, 5326.06ms Time] [2021-11-02 13:54:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-11-02 13:54:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1075. [2021-11-02 13:54:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1073 states have (on average 1.2805219012115563) internal successors, (1374), 1074 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1374 transitions. [2021-11-02 13:54:09,728 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1374 transitions. Word has length 123 [2021-11-02 13:54:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:54:09,728 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1374 transitions. [2021-11-02 13:54:09,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1374 transitions. [2021-11-02 13:54:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 13:54:09,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:54:09,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:54:09,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 13:54:09,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 13:54:09,943 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:54:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:54:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash -143240446, now seen corresponding path program 1 times [2021-11-02 13:54:09,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:54:09,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528605895] [2021-11-02 13:54:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:09,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:54:09,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:54:09,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557117838] [2021-11-02 13:54:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:09,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:54:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:54:09,989 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:54:09,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 13:54:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:54:10,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 13:54:10,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:54:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:54:11,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:54:11,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:54:11,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528605895] [2021-11-02 13:54:11,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:54:11,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557117838] [2021-11-02 13:54:11,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557117838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:54:11,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:54:11,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 13:54:11,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669871740] [2021-11-02 13:54:11,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 13:54:11,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:54:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 13:54:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 13:54:11,102 INFO L87 Difference]: Start difference. First operand 1075 states and 1374 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:13,270 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:54:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:54:18,058 INFO L93 Difference]: Finished difference Result 2071 states and 2632 transitions. [2021-11-02 13:54:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 13:54:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-02 13:54:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:54:18,062 INFO L225 Difference]: With dead ends: 2071 [2021-11-02 13:54:18,062 INFO L226 Difference]: Without dead ends: 1313 [2021-11-02 13:54:18,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 241.44ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-02 13:54:18,063 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5900.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.60ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6641.93ms IncrementalHoareTripleChecker+Time [2021-11-02 13:54:18,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 1421 Unknown, 0 Unchecked, 5.60ms Time], IncrementalHoareTripleChecker [8 Valid, 1412 Invalid, 1 Unknown, 0 Unchecked, 6641.93ms Time] [2021-11-02 13:54:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-11-02 13:54:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1075. [2021-11-02 13:54:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1073 states have (on average 1.2432432432432432) internal successors, (1334), 1074 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1334 transitions. [2021-11-02 13:54:18,142 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1334 transitions. Word has length 124 [2021-11-02 13:54:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:54:18,143 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1334 transitions. [2021-11-02 13:54:18,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1334 transitions. [2021-11-02 13:54:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-02 13:54:18,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:54:18,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:54:18,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 13:54:18,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 13:54:18,356 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:54:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:54:18,356 INFO L85 PathProgramCache]: Analyzing trace with hash 12071054, now seen corresponding path program 1 times [2021-11-02 13:54:18,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:54:18,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443347386] [2021-11-02 13:54:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:18,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:54:18,411 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:54:18,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922456549] [2021-11-02 13:54:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:18,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:54:18,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:54:18,413 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:54:18,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 13:54:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:54:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 3052 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-02 13:54:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:54:21,621 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-02 13:54:21,622 INFO L388 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 48 treesize of output 44 [2021-11-02 13:54:21,694 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-02 13:54:21,694 INFO L388 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 44 treesize of output 40 [2021-11-02 13:54:22,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-02 13:54:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-02 13:54:22,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-02 13:54:22,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-02 13:54:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:54:23,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:54:23,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:54:23,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443347386] [2021-11-02 13:54:23,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:54:23,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922456549] [2021-11-02 13:54:23,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922456549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:54:23,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:54:23,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-02 13:54:23,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75466239] [2021-11-02 13:54:23,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 13:54:23,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:54:23,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 13:54:23,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-02 13:54:23,104 INFO L87 Difference]: Start difference. First operand 1075 states and 1334 transitions. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 19 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:25,147 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:54:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:54:46,451 INFO L93 Difference]: Finished difference Result 2671 states and 3376 transitions. [2021-11-02 13:54:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 13:54:46,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 19 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-02 13:54:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:54:46,463 INFO L225 Difference]: With dead ends: 2671 [2021-11-02 13:54:46,464 INFO L226 Difference]: Without dead ends: 2588 [2021-11-02 13:54:46,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 6597.14ms TimeCoverageRelationStatistics Valid=561, Invalid=2091, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 13:54:46,468 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2015 mSDsluCounter, 3742 mSDsCounter, 0 mSdLazyCounter, 5363 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15499.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.15ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5363 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17440.81ms IncrementalHoareTripleChecker+Time [2021-11-02 13:54:46,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2015 Valid, 0 Invalid, 5424 Unknown, 0 Unchecked, 46.15ms Time], IncrementalHoareTripleChecker [60 Valid, 5363 Invalid, 1 Unknown, 0 Unchecked, 17440.81ms Time] [2021-11-02 13:54:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-11-02 13:54:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1070. [2021-11-02 13:54:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1068 states have (on average 1.243445692883895) internal successors, (1328), 1069 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1328 transitions. [2021-11-02 13:54:46,558 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1328 transitions. Word has length 125 [2021-11-02 13:54:46,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:54:46,558 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1328 transitions. [2021-11-02 13:54:46,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 19 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1328 transitions. [2021-11-02 13:54:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-02 13:54:46,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:54:46,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:54:46,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 13:54:46,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:54:46,772 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:54:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:54:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1008997300, now seen corresponding path program 1 times [2021-11-02 13:54:46,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:54:46,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022668695] [2021-11-02 13:54:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:46,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:54:46,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:54:46,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884096369] [2021-11-02 13:54:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:54:46,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:54:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:54:46,831 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:54:46,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 13:54:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:54:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-02 13:54:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:54:48,078 INFO L388 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 [2021-11-02 13:54:48,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:54:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 13:54:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:54:48,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 13:54:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:54:48,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 13:54:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:54:48,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 13:54:49,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 13:54:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 13:54:49,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:54:49,594 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-02 13:54:49,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 58 [2021-11-02 13:54:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:54:49,666 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-02 13:54:49,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 43 [2021-11-02 13:54:50,361 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-02 13:54:50,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-11-02 13:54:50,419 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-02 13:54:50,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2021-11-02 13:54:50,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 13:54:50,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-02 13:54:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:54:51,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:54:51,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:54:51,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022668695] [2021-11-02 13:54:51,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:54:51,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884096369] [2021-11-02 13:54:51,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884096369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:54:51,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:54:51,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-02 13:54:51,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498433792] [2021-11-02 13:54:51,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 13:54:51,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:54:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 13:54:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-02 13:54:51,020 INFO L87 Difference]: Start difference. First operand 1070 states and 1328 transitions. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:54:53,071 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:55:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:55:11,635 INFO L93 Difference]: Finished difference Result 2399 states and 3001 transitions. [2021-11-02 13:55:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 13:55:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-02 13:55:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:55:11,641 INFO L225 Difference]: With dead ends: 2399 [2021-11-02 13:55:11,641 INFO L226 Difference]: Without dead ends: 1866 [2021-11-02 13:55:11,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3066.87ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 13:55:11,646 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 900 mSDsluCounter, 4582 mSDsCounter, 0 mSdLazyCounter, 6386 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16581.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.07ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 6386 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18170.11ms IncrementalHoareTripleChecker+Time [2021-11-02 13:55:11,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 0 Invalid, 6432 Unknown, 0 Unchecked, 52.07ms Time], IncrementalHoareTripleChecker [45 Valid, 6386 Invalid, 1 Unknown, 0 Unchecked, 18170.11ms Time] [2021-11-02 13:55:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-11-02 13:55:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1065. [2021-11-02 13:55:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1063 states have (on average 1.242709313264346) internal successors, (1321), 1064 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:55:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1321 transitions. [2021-11-02 13:55:11,733 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1321 transitions. Word has length 125 [2021-11-02 13:55:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:55:11,733 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1321 transitions. [2021-11-02 13:55:11,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:55:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1321 transitions. [2021-11-02 13:55:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-02 13:55:11,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:55:11,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:55:11,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 13:55:11,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:55:11,961 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:55:11,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:55:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash 724431248, now seen corresponding path program 1 times [2021-11-02 13:55:11,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:55:11,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574939089] [2021-11-02 13:55:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:55:11,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:55:12,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:55:12,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579875254] [2021-11-02 13:55:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:55:12,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:55:12,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:55:12,029 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:55:12,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 13:55:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:55:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-02 13:55:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:55:13,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 13:55:13,490 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-02 13:55:13,490 INFO L388 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 19 [2021-11-02 13:55:13,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-02 13:55:15,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 13:55:15,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 13:55:16,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-02 13:55:16,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-11-02 13:55:16,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-02 13:55:16,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-11-02 13:55:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:55:16,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:55:16,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:55:16,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574939089] [2021-11-02 13:55:16,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:55:16,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579875254] [2021-11-02 13:55:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579875254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:55:16,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:55:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-02 13:55:16,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697594549] [2021-11-02 13:55:16,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 13:55:16,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:55:16,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 13:55:16,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-02 13:55:16,674 INFO L87 Difference]: Start difference. First operand 1065 states and 1321 transitions. Second operand has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:55:18,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:55:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:55:43,696 INFO L93 Difference]: Finished difference Result 4336 states and 5396 transitions. [2021-11-02 13:55:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 13:55:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-02 13:55:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:55:43,717 INFO L225 Difference]: With dead ends: 4336 [2021-11-02 13:55:43,717 INFO L226 Difference]: Without dead ends: 4239 [2021-11-02 13:55:43,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 10569.30ms TimeCoverageRelationStatistics Valid=1043, Invalid=3649, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 13:55:43,719 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2932 mSDsluCounter, 4587 mSDsCounter, 0 mSdLazyCounter, 4857 mSolverCounterSat, 180 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15317.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2932 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.39ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4857 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1311 IncrementalHoareTripleChecker+Unchecked, 16984.21ms IncrementalHoareTripleChecker+Time [2021-11-02 13:55:43,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2932 Valid, 0 Invalid, 6349 Unknown, 0 Unchecked, 46.39ms Time], IncrementalHoareTripleChecker [180 Valid, 4857 Invalid, 1 Unknown, 1311 Unchecked, 16984.21ms Time] [2021-11-02 13:55:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-11-02 13:55:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 1101. [2021-11-02 13:55:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1099 states have (on average 1.2420382165605095) internal successors, (1365), 1100 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:55:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1365 transitions. [2021-11-02 13:55:43,823 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1365 transitions. Word has length 126 [2021-11-02 13:55:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:55:43,823 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1365 transitions. [2021-11-02 13:55:43,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:55:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1365 transitions. [2021-11-02 13:55:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 13:55:43,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:55:43,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:55:43,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 13:55:44,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 13:55:44,029 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:55:44,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:55:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1198351404, now seen corresponding path program 1 times [2021-11-02 13:55:44,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:55:44,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213839526] [2021-11-02 13:55:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:55:44,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:55:44,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:55:44,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250847011] [2021-11-02 13:55:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:55:44,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:55:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:55:44,184 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:55:44,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 13:55:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:55:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 3068 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 13:55:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:55:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:55:45,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:55:45,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:55:45,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213839526] [2021-11-02 13:55:45,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:55:45,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250847011] [2021-11-02 13:55:45,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250847011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:55:45,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:55:45,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 13:55:45,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395655015] [2021-11-02 13:55:45,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 13:55:45,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:55:45,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 13:55:45,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-02 13:55:45,478 INFO L87 Difference]: Start difference. First operand 1101 states and 1365 transitions. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:55:47,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:56:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:56:00,288 INFO L93 Difference]: Finished difference Result 3743 states and 4640 transitions. [2021-11-02 13:56:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 13:56:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-02 13:56:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:56:00,294 INFO L225 Difference]: With dead ends: 3743 [2021-11-02 13:56:00,294 INFO L226 Difference]: Without dead ends: 2474 [2021-11-02 13:56:00,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 681.91ms TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2021-11-02 13:56:00,300 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 858 mSDsluCounter, 3324 mSDsCounter, 0 mSdLazyCounter, 4202 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12587.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.66ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13833.62ms IncrementalHoareTripleChecker+Time [2021-11-02 13:56:00,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 0 Invalid, 4218 Unknown, 0 Unchecked, 27.66ms Time], IncrementalHoareTripleChecker [15 Valid, 4202 Invalid, 1 Unknown, 0 Unchecked, 13833.62ms Time] [2021-11-02 13:56:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-11-02 13:56:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1061. [2021-11-02 13:56:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1059 states have (on average 1.2417374881964116) internal successors, (1315), 1060 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:56:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1315 transitions. [2021-11-02 13:56:00,405 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1315 transitions. Word has length 128 [2021-11-02 13:56:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:56:00,405 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1315 transitions. [2021-11-02 13:56:00,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:56:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1315 transitions. [2021-11-02 13:56:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 13:56:00,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:56:00,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:56:00,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-02 13:56:00,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 13:56:00,623 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:56:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:56:00,624 INFO L85 PathProgramCache]: Analyzing trace with hash 235977226, now seen corresponding path program 1 times [2021-11-02 13:56:00,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:56:00,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663418690] [2021-11-02 13:56:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:56:00,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:56:00,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:56:00,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504796770] [2021-11-02 13:56:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:56:00,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:56:00,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:56:00,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:56:00,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 13:56:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 13:56:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-02 13:56:01,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 13:56:01,739 INFO L388 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 [2021-11-02 13:56:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:02,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 13:56:03,148 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 13:56:03,148 INFO L388 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 [2021-11-02 13:56:03,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-11-02 13:56:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-11-02 13:56:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2021-11-02 13:56:04,222 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 13:56:04,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-11-02 13:56:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 13:56:04,439 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-02 13:56:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-02 13:56:05,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:56:05,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-02 13:56:05,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 13:56:05,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2021-11-02 13:56:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 13:56:06,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 13:56:06,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 13:56:06,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663418690] [2021-11-02 13:56:06,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 13:56:06,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504796770] [2021-11-02 13:56:06,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504796770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 13:56:06,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 13:56:06,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-02 13:56:06,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802425577] [2021-11-02 13:56:06,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 13:56:06,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 13:56:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 13:56:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-02 13:56:06,173 INFO L87 Difference]: Start difference. First operand 1061 states and 1315 transitions. Second operand has 21 states, 21 states have (on average 6.095238095238095) internal successors, (128), 21 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:56:09,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 13:56:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 13:56:22,573 INFO L93 Difference]: Finished difference Result 2801 states and 3505 transitions. [2021-11-02 13:56:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 13:56:22,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.095238095238095) internal successors, (128), 21 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-02 13:56:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 13:56:22,579 INFO L225 Difference]: With dead ends: 2801 [2021-11-02 13:56:22,579 INFO L226 Difference]: Without dead ends: 2284 [2021-11-02 13:56:22,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2133.80ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-11-02 13:56:22,585 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 440 mSDsluCounter, 3277 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13811.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.70ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 955 IncrementalHoareTripleChecker+Unchecked, 15692.17ms IncrementalHoareTripleChecker+Time [2021-11-02 13:56:22,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 0 Invalid, 4550 Unknown, 0 Unchecked, 29.70ms Time], IncrementalHoareTripleChecker [27 Valid, 3567 Invalid, 1 Unknown, 955 Unchecked, 15692.17ms Time] [2021-11-02 13:56:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-11-02 13:56:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1131. [2021-11-02 13:56:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1129 states have (on average 1.241806908768822) internal successors, (1402), 1130 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:56:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1402 transitions. [2021-11-02 13:56:22,706 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1402 transitions. Word has length 128 [2021-11-02 13:56:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 13:56:22,706 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1402 transitions. [2021-11-02 13:56:22,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.095238095238095) internal successors, (128), 21 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 13:56:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1402 transitions. [2021-11-02 13:56:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 13:56:22,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 13:56:22,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 13:56:22,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-02 13:56:22,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 13:56:22,923 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 13:56:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 13:56:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2130057844, now seen corresponding path program 1 times [2021-11-02 13:56:22,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 13:56:22,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888298813] [2021-11-02 13:56:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:56:22,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 13:56:22,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 13:56:22,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89064369] [2021-11-02 13:56:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 13:56:22,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 13:56:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 13:56:22,979 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 13:56:22,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process Killed by 15