./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 5b36d44f 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-5b36d44 [2021-11-07 09:57:30,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 09:57:30,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 09:57:30,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 09:57:30,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 09:57:30,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 09:57:30,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 09:57:30,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 09:57:30,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 09:57:30,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 09:57:30,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 09:57:30,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 09:57:30,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 09:57:30,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 09:57:30,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 09:57:30,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 09:57:30,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 09:57:30,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 09:57:30,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 09:57:30,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 09:57:30,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 09:57:30,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 09:57:30,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 09:57:30,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 09:57:30,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 09:57:30,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 09:57:30,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 09:57:30,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 09:57:30,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 09:57:30,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 09:57:30,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 09:57:30,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 09:57:30,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 09:57:30,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 09:57:30,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 09:57:30,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 09:57:30,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 09:57:30,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 09:57:30,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 09:57:30,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 09:57:30,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 09:57:30,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 09:57:30,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 09:57:30,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 09:57:30,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 09:57:30,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 09:57:30,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 09:57:30,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 09:57:30,812 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 09:57:30,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 09:57:30,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 09:57:30,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 09:57:30,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 09:57:30,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 09:57:30,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 09:57:30,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 09:57:30,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 09:57:30,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 09:57:30,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 09:57:30,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 09:57:30,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 09:57:30,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 09:57:30,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 09:57:30,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 09:57:30,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 09:57:30,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 09:57:30,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 09:57:30,816 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 09:57:30,816 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 09:57:30,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 09:57:30,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 09:57:30,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-11-07 09:57:31,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 09:57:31,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 09:57:31,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 09:57:31,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 09:57:31,032 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 09:57:31,033 INFO L432 ainManager$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 [2021-11-07 09:57:31,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448b5ed6a/a878ec6f965f4355865b7274875aa034/FLAGf5477ec0e [2021-11-07 09:57:31,586 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 09:57:31,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-07 09:57:31,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448b5ed6a/a878ec6f965f4355865b7274875aa034/FLAGf5477ec0e [2021-11-07 09:57:32,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448b5ed6a/a878ec6f965f4355865b7274875aa034 [2021-11-07 09:57:32,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 09:57:32,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 09:57:32,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 09:57:32,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 09:57:32,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 09:57:32,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:57:32" (1/1) ... [2021-11-07 09:57:32,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1b2bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:32, skipping insertion in model container [2021-11-07 09:57:32,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:57:32" (1/1) ... [2021-11-07 09:57:32,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 09:57:32,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 09:57:32,330 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] [2021-11-07 09:57:32,336 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] [2021-11-07 09:57:32,352 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 09:57:32,358 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 09:57:32,713 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 09:57:32,748 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,748 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,749 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,749 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,750 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,757 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,758 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,759 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,759 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:32,935 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 09:57:32,936 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 09:57:32,937 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 09:57:32,944 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 09:57:32,948 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 09:57:32,949 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 09:57:32,950 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 09:57:32,951 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 09:57:32,968 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 09:57:32,968 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 09:57:33,055 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,055 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 09:57:33,108 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 09:57:33,116 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] [2021-11-07 09:57:33,117 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] [2021-11-07 09:57:33,118 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 09:57:33,119 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 09:57:33,138 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 09:57:33,147 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,148 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,148 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,148 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,149 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,153 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,154 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,154 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,155 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,182 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 09:57:33,194 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 09:57:33,195 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 09:57:33,195 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 09:57:33,196 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 09:57:33,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 09:57:33,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 09:57:33,197 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 09:57:33,199 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 09:57:33,199 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 09:57:33,236 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,239 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 09:57:33,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 09:57:33,452 INFO L208 MainTranslator]: Completed translation [2021-11-07 09:57:33,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33 WrapperNode [2021-11-07 09:57:33,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 09:57:33,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 09:57:33,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 09:57:33,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 09:57:33,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 09:57:33,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 09:57:33,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 09:57:33,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 09:57:33,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 09:57:33,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 09:57:33,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 09:57:33,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 09:57:33,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (1/1) ... [2021-11-07 09:57:33,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 09:57:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:33,712 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) [2021-11-07 09:57:33,751 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 [2021-11-07 09:57:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 09:57:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 09:57:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 09:57:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 09:57:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 09:57:33,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 09:57:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 09:57:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-07 09:57:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 09:57:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 09:57:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 09:57:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 09:57:41,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 09:57:41,016 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-07 09:57:41,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:57:41 BoogieIcfgContainer [2021-11-07 09:57:41,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 09:57:41,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 09:57:41,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 09:57:41,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 09:57:41,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:57:32" (1/3) ... [2021-11-07 09:57:41,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c509281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:57:41, skipping insertion in model container [2021-11-07 09:57:41,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:57:33" (2/3) ... [2021-11-07 09:57:41,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c509281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:57:41, skipping insertion in model container [2021-11-07 09:57:41,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:57:41" (3/3) ... [2021-11-07 09:57:41,023 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-11-07 09:57:41,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 09:57:41,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 09:57:41,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 09:57:41,078 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 [2021-11-07 09:57:41,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 09:57:41,097 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) [2021-11-07 09:57:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 09:57:41,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:41,105 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] [2021-11-07 09:57:41,106 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:41,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1087609144, now seen corresponding path program 1 times [2021-11-07 09:57:41,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:41,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976563733] [2021-11-07 09:57:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:41,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:41,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976563733] [2021-11-07 09:57:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976563733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:41,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:41,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 09:57:41,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581545256] [2021-11-07 09:57:41,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:41,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 09:57:41,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:41,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 09:57:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 09:57:41,601 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) [2021-11-07 09:57:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:41,624 INFO L93 Difference]: Finished difference Result 380 states and 549 transitions. [2021-11-07 09:57:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 09:57:41,626 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 [2021-11-07 09:57:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:41,632 INFO L225 Difference]: With dead ends: 380 [2021-11-07 09:57:41,632 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 09:57:41,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.06ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 09:57:41,637 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:41,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 09:57:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 09:57:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-07 09:57:41,672 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) [2021-11-07 09:57:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2021-11-07 09:57:41,676 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 45 [2021-11-07 09:57:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2021-11-07 09:57:41,678 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) [2021-11-07 09:57:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2021-11-07 09:57:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 09:57:41,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:41,679 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] [2021-11-07 09:57:41,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 09:57:41,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 339318222, now seen corresponding path program 1 times [2021-11-07 09:57:41,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:41,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163323189] [2021-11-07 09:57:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:41,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:42,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:42,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163323189] [2021-11-07 09:57:42,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163323189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:42,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:42,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 09:57:42,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996821741] [2021-11-07 09:57:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:42,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 09:57:42,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 09:57:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 09:57:42,016 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) [2021-11-07 09:57:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:42,098 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2021-11-07 09:57:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 09:57:42,099 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 [2021-11-07 09:57:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:42,100 INFO L225 Difference]: With dead ends: 296 [2021-11-07 09:57:42,102 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 09:57:42,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.29ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 09:57:42,104 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 429 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.97ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:42,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 274 Invalid, 9 Unknown, 0 Unchecked, 3.91ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 42.97ms Time] [2021-11-07 09:57:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 09:57:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-07 09:57:42,113 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) [2021-11-07 09:57:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 244 transitions. [2021-11-07 09:57:42,114 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 244 transitions. Word has length 51 [2021-11-07 09:57:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:42,114 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 244 transitions. [2021-11-07 09:57:42,115 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) [2021-11-07 09:57:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 244 transitions. [2021-11-07 09:57:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 09:57:42,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:42,116 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] [2021-11-07 09:57:42,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 09:57:42,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash 168473663, now seen corresponding path program 1 times [2021-11-07 09:57:42,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:42,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568530937] [2021-11-07 09:57:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:42,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:42,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:42,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568530937] [2021-11-07 09:57:42,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568530937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:42,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:42,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 09:57:42,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325549396] [2021-11-07 09:57:42,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:42,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 09:57:42,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 09:57:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:57:42,412 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) [2021-11-07 09:57:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:42,670 INFO L93 Difference]: Finished difference Result 409 states and 532 transitions. [2021-11-07 09:57:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 09:57:42,670 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 [2021-11-07 09:57:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:42,672 INFO L225 Difference]: With dead ends: 409 [2021-11-07 09:57:42,672 INFO L226 Difference]: Without dead ends: 269 [2021-11-07 09:57:42,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.02ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 09:57:42,673 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 633 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.46ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:42,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 463 Invalid, 43 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 181.46ms Time] [2021-11-07 09:57:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-07 09:57:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 188. [2021-11-07 09:57:42,681 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) [2021-11-07 09:57:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2021-11-07 09:57:42,682 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 55 [2021-11-07 09:57:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:42,683 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2021-11-07 09:57:42,683 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) [2021-11-07 09:57:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2021-11-07 09:57:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 09:57:42,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:42,684 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] [2021-11-07 09:57:42,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 09:57:42,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:42,685 INFO L85 PathProgramCache]: Analyzing trace with hash -795727197, now seen corresponding path program 1 times [2021-11-07 09:57:42,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:42,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726219251] [2021-11-07 09:57:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:42,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:42,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:42,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142692724] [2021-11-07 09:57:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:42,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:42,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:42,745 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) [2021-11-07 09:57:42,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 09:57:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 09:57:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:43,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:43,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:43,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726219251] [2021-11-07 09:57:43,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:43,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142692724] [2021-11-07 09:57:43,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142692724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:43,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:43,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 09:57:43,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023675967] [2021-11-07 09:57:43,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:43,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 09:57:43,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 09:57:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 09:57:43,966 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) [2021-11-07 09:57:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:44,184 INFO L93 Difference]: Finished difference Result 297 states and 384 transitions. [2021-11-07 09:57:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 09:57:44,185 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 [2021-11-07 09:57:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:44,186 INFO L225 Difference]: With dead ends: 297 [2021-11-07 09:57:44,186 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 09:57:44,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.03ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 09:57:44,187 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 839 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.50ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:44,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 308 Invalid, 32 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 121.50ms Time] [2021-11-07 09:57:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 09:57:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-07 09:57:44,193 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) [2021-11-07 09:57:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 242 transitions. [2021-11-07 09:57:44,193 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 242 transitions. Word has length 63 [2021-11-07 09:57:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 242 transitions. [2021-11-07 09:57:44,194 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) [2021-11-07 09:57:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 242 transitions. [2021-11-07 09:57:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 09:57:44,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:44,195 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] [2021-11-07 09:57:44,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 09:57:44,408 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 [2021-11-07 09:57:44,409 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1514601710, now seen corresponding path program 1 times [2021-11-07 09:57:44,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:44,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373061290] [2021-11-07 09:57:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:44,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:44,459 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:44,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010058498] [2021-11-07 09:57:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:44,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:44,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:44,461 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) [2021-11-07 09:57:44,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 09:57:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 09:57:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:45,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:45,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:45,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373061290] [2021-11-07 09:57:45,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:45,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010058498] [2021-11-07 09:57:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010058498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:45,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:45,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 09:57:45,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154383687] [2021-11-07 09:57:45,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:45,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 09:57:45,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:45,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 09:57:45,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 09:57:45,593 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) [2021-11-07 09:57:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:46,029 INFO L93 Difference]: Finished difference Result 384 states and 496 transitions. [2021-11-07 09:57:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 09:57:46,031 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 [2021-11-07 09:57:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:46,032 INFO L225 Difference]: With dead ends: 384 [2021-11-07 09:57:46,032 INFO L226 Difference]: Without dead ends: 259 [2021-11-07 09:57:46,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 241.00ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-07 09:57:46,033 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 1350 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.57ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 264.21ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:46,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 438 Invalid, 75 Unknown, 0 Unchecked, 3.57ms Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 264.21ms Time] [2021-11-07 09:57:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-07 09:57:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 188. [2021-11-07 09:57:46,040 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) [2021-11-07 09:57:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-11-07 09:57:46,041 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 75 [2021-11-07 09:57:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:46,041 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-11-07 09:57:46,041 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) [2021-11-07 09:57:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-11-07 09:57:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 09:57:46,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:46,042 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] [2021-11-07 09:57:46,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 09:57:46,252 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 [2021-11-07 09:57:46,253 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 328015662, now seen corresponding path program 1 times [2021-11-07 09:57:46,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:46,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666400010] [2021-11-07 09:57:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:46,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:46,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:46,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776857022] [2021-11-07 09:57:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:46,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:46,328 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) [2021-11-07 09:57:46,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 09:57:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:46,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 09:57:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:47,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:47,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:47,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666400010] [2021-11-07 09:57:47,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:47,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776857022] [2021-11-07 09:57:47,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776857022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:47,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:47,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 09:57:47,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486864464] [2021-11-07 09:57:47,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:47,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 09:57:47,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 09:57:47,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:57:47,148 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-11-07 09:57:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:47,330 INFO L93 Difference]: Finished difference Result 339 states and 434 transitions. [2021-11-07 09:57:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 09:57:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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 [2021-11-07 09:57:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:47,341 INFO L225 Difference]: With dead ends: 339 [2021-11-07 09:57:47,341 INFO L226 Difference]: Without dead ends: 276 [2021-11-07 09:57:47,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.29ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 09:57:47,342 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 111 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.41ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:47,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1211 Invalid, 60 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 128.41ms Time] [2021-11-07 09:57:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-07 09:57:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 191. [2021-11-07 09:57:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.2857142857142858) internal successors, (243), 190 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) [2021-11-07 09:57:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 243 transitions. [2021-11-07 09:57:47,349 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 243 transitions. Word has length 83 [2021-11-07 09:57:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:47,349 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 243 transitions. [2021-11-07 09:57:47,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-11-07 09:57:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 243 transitions. [2021-11-07 09:57:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 09:57:47,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:47,350 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] [2021-11-07 09:57:47,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 09:57:47,566 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 [2021-11-07 09:57:47,568 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash 329624376, now seen corresponding path program 1 times [2021-11-07 09:57:47,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:47,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170291573] [2021-11-07 09:57:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:47,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:47,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:47,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931736551] [2021-11-07 09:57:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:47,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:47,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:47,625 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) [2021-11-07 09:57:47,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 09:57:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 09:57:48,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:48,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:48,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:48,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170291573] [2021-11-07 09:57:48,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:48,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931736551] [2021-11-07 09:57:48,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931736551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:48,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:48,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 09:57:48,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957980783] [2021-11-07 09:57:48,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:48,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 09:57:48,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 09:57:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 09:57:48,459 INFO L87 Difference]: Start difference. First operand 191 states and 243 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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) [2021-11-07 09:57:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:48,570 INFO L93 Difference]: Finished difference Result 268 states and 338 transitions. [2021-11-07 09:57:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 09:57:48,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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 [2021-11-07 09:57:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:48,571 INFO L225 Difference]: With dead ends: 268 [2021-11-07 09:57:48,571 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 09:57:48,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.55ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:57:48,572 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 228 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.92ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:48,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 467 Invalid, 28 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 78.92ms Time] [2021-11-07 09:57:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 09:57:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2021-11-07 09:57:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.2751322751322751) internal successors, (241), 190 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) [2021-11-07 09:57:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 241 transitions. [2021-11-07 09:57:48,578 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 241 transitions. Word has length 83 [2021-11-07 09:57:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:48,578 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 241 transitions. [2021-11-07 09:57:48,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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) [2021-11-07 09:57:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 241 transitions. [2021-11-07 09:57:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 09:57:48,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:48,579 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] [2021-11-07 09:57:48,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 09:57:48,779 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 [2021-11-07 09:57:48,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:48,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:48,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1669729280, now seen corresponding path program 1 times [2021-11-07 09:57:48,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:48,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070848469] [2021-11-07 09:57:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:48,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:48,841 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:48,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407739942] [2021-11-07 09:57:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:48,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:48,843 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) [2021-11-07 09:57:48,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 09:57:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 09:57:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 09:57:49,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:49,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:49,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070848469] [2021-11-07 09:57:49,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:49,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407739942] [2021-11-07 09:57:49,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407739942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:49,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:49,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 09:57:49,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596103348] [2021-11-07 09:57:49,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:49,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 09:57:49,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:49,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 09:57:49,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:57:49,703 INFO L87 Difference]: Start difference. First operand 191 states and 241 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2021-11-07 09:57:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:50,018 INFO L93 Difference]: Finished difference Result 423 states and 537 transitions. [2021-11-07 09:57:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 09:57:50,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 [2021-11-07 09:57:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:50,020 INFO L225 Difference]: With dead ends: 423 [2021-11-07 09:57:50,020 INFO L226 Difference]: Without dead ends: 308 [2021-11-07 09:57:50,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.05ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 09:57:50,021 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 300 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 228.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 246.85ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:50,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 648 Invalid, 95 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [30 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 246.85ms Time] [2021-11-07 09:57:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-07 09:57:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 198. [2021-11-07 09:57:50,027 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) [2021-11-07 09:57:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 248 transitions. [2021-11-07 09:57:50,032 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 248 transitions. Word has length 84 [2021-11-07 09:57:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:50,032 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 248 transitions. [2021-11-07 09:57:50,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2021-11-07 09:57:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 248 transitions. [2021-11-07 09:57:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 09:57:50,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:50,033 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] [2021-11-07 09:57:50,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 09:57:50,251 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 [2021-11-07 09:57:50,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash 968358744, now seen corresponding path program 1 times [2021-11-07 09:57:50,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:50,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028710647] [2021-11-07 09:57:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:50,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:50,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:50,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276695433] [2021-11-07 09:57:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:50,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:50,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:50,306 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) [2021-11-07 09:57:50,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 09:57:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:50,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 09:57:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 09:57:51,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:51,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:51,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028710647] [2021-11-07 09:57:51,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:51,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276695433] [2021-11-07 09:57:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276695433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:51,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:51,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 09:57:51,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516782144] [2021-11-07 09:57:51,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:51,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 09:57:51,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 09:57:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 09:57:51,256 INFO L87 Difference]: Start difference. First operand 198 states and 248 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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) [2021-11-07 09:57:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:51,806 INFO L93 Difference]: Finished difference Result 374 states and 465 transitions. [2021-11-07 09:57:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 09:57:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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 [2021-11-07 09:57:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:51,807 INFO L225 Difference]: With dead ends: 374 [2021-11-07 09:57:51,807 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 09:57:51,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 307.79ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 09:57:51,808 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 442 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.79ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:51,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 860 Invalid, 135 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [43 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 304.79ms Time] [2021-11-07 09:57:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 09:57:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 202. [2021-11-07 09:57:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.26) internal successors, (252), 201 states have internal predecessors, (252), 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) [2021-11-07 09:57:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 252 transitions. [2021-11-07 09:57:51,816 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 252 transitions. Word has length 86 [2021-11-07 09:57:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:51,816 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 252 transitions. [2021-11-07 09:57:51,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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) [2021-11-07 09:57:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 252 transitions. [2021-11-07 09:57:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 09:57:51,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:51,817 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] [2021-11-07 09:57:51,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 09:57:52,043 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 [2021-11-07 09:57:52,044 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1597991650, now seen corresponding path program 1 times [2021-11-07 09:57:52,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:52,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560924123] [2021-11-07 09:57:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:52,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:52,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:52,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772805507] [2021-11-07 09:57:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:52,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:52,116 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) [2021-11-07 09:57:52,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 09:57:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 09:57:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 09:57:53,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:53,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:53,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560924123] [2021-11-07 09:57:53,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:53,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772805507] [2021-11-07 09:57:53,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772805507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:53,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:53,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 09:57:53,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473710011] [2021-11-07 09:57:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 09:57:53,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 09:57:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 09:57:53,260 INFO L87 Difference]: Start difference. First operand 202 states and 252 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 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) [2021-11-07 09:57:53,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:53,649 INFO L93 Difference]: Finished difference Result 419 states and 510 transitions. [2021-11-07 09:57:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 09:57:53,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 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 88 [2021-11-07 09:57:53,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:53,652 INFO L225 Difference]: With dead ends: 419 [2021-11-07 09:57:53,652 INFO L226 Difference]: Without dead ends: 323 [2021-11-07 09:57:53,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 157.33ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 09:57:53,653 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 652 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 225.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 263.32ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:53,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 682 Invalid, 87 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 263.32ms Time] [2021-11-07 09:57:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-07 09:57:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 202. [2021-11-07 09:57:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.255) internal successors, (251), 201 states have internal predecessors, (251), 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) [2021-11-07 09:57:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 251 transitions. [2021-11-07 09:57:53,661 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 251 transitions. Word has length 88 [2021-11-07 09:57:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:53,661 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 251 transitions. [2021-11-07 09:57:53,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 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) [2021-11-07 09:57:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 251 transitions. [2021-11-07 09:57:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 09:57:53,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:53,662 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] [2021-11-07 09:57:53,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 09:57:53,871 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 [2021-11-07 09:57:53,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash 647571582, now seen corresponding path program 1 times [2021-11-07 09:57:53,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:53,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510749518] [2021-11-07 09:57:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:53,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:53,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:53,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044377398] [2021-11-07 09:57:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:53,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:53,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:53,938 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) [2021-11-07 09:57:53,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 09:57:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:54,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 09:57:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 09:57:54,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:54,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:54,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510749518] [2021-11-07 09:57:54,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:54,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044377398] [2021-11-07 09:57:54,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044377398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:54,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:54,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 09:57:54,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86729939] [2021-11-07 09:57:54,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:54,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 09:57:54,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 09:57:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 09:57:54,912 INFO L87 Difference]: Start difference. First operand 202 states and 251 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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) [2021-11-07 09:57:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:55,676 INFO L93 Difference]: Finished difference Result 367 states and 449 transitions. [2021-11-07 09:57:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 09:57:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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 89 [2021-11-07 09:57:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:55,678 INFO L225 Difference]: With dead ends: 367 [2021-11-07 09:57:55,678 INFO L226 Difference]: Without dead ends: 258 [2021-11-07 09:57:55,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 381.64ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-07 09:57:55,679 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 404 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 458.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 497.63ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:55,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1484 Invalid, 219 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [31 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 497.63ms Time] [2021-11-07 09:57:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-07 09:57:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 202. [2021-11-07 09:57:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.24) internal successors, (248), 201 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) [2021-11-07 09:57:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2021-11-07 09:57:55,690 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 89 [2021-11-07 09:57:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:55,690 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2021-11-07 09:57:55,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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) [2021-11-07 09:57:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2021-11-07 09:57:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 09:57:55,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:55,692 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] [2021-11-07 09:57:55,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 09:57:55,903 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 [2021-11-07 09:57:55,903 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1384834045, now seen corresponding path program 1 times [2021-11-07 09:57:55,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:55,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400831249] [2021-11-07 09:57:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:55,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:55,974 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:55,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995879866] [2021-11-07 09:57:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:55,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:55,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:55,975 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) [2021-11-07 09:57:55,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 09:57:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 09:57:56,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:57:56,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:56,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:56,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400831249] [2021-11-07 09:57:56,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:56,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995879866] [2021-11-07 09:57:56,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995879866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:56,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:56,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 09:57:56,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919476541] [2021-11-07 09:57:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:56,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 09:57:56,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 09:57:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 09:57:56,952 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2021-11-07 09:57:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:57:57,421 INFO L93 Difference]: Finished difference Result 460 states and 561 transitions. [2021-11-07 09:57:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 09:57:57,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 09:57:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:57:57,423 INFO L225 Difference]: With dead ends: 460 [2021-11-07 09:57:57,423 INFO L226 Difference]: Without dead ends: 337 [2021-11-07 09:57:57,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 296.00ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-07 09:57:57,424 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 354 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 251.54ms IncrementalHoareTripleChecker+Time [2021-11-07 09:57:57,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1649 Invalid, 126 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [20 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 251.54ms Time] [2021-11-07 09:57:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-07 09:57:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 208. [2021-11-07 09:57:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 206 states have (on average 1.2427184466019416) internal successors, (256), 207 states have internal predecessors, (256), 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) [2021-11-07 09:57:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2021-11-07 09:57:57,433 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 92 [2021-11-07 09:57:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:57:57,433 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2021-11-07 09:57:57,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2021-11-07 09:57:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2021-11-07 09:57:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 09:57:57,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:57:57,436 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] [2021-11-07 09:57:57,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 09:57:57,647 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 [2021-11-07 09:57:57,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:57:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:57:57,649 INFO L85 PathProgramCache]: Analyzing trace with hash -554328001, now seen corresponding path program 1 times [2021-11-07 09:57:57,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:57:57,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249842115] [2021-11-07 09:57:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:57,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:57:57,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:57:57,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468063501] [2021-11-07 09:57:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:57:57,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:57:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:57:57,714 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) [2021-11-07 09:57:57,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 09:57:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:57:58,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 09:57:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:57:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:57:58,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:57:58,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:57:58,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249842115] [2021-11-07 09:57:58,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:57:58,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468063501] [2021-11-07 09:57:58,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468063501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:57:58,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:57:58,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 09:57:58,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745879221] [2021-11-07 09:57:58,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:57:58,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 09:57:58,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:57:58,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 09:57:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 09:57:58,806 INFO L87 Difference]: Start difference. First operand 208 states and 256 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) [2021-11-07 09:58:00,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:02,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:05,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:58:06,173 INFO L93 Difference]: Finished difference Result 405 states and 499 transitions. [2021-11-07 09:58:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 09:58:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 09:58:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:58:06,174 INFO L225 Difference]: With dead ends: 405 [2021-11-07 09:58:06,174 INFO L226 Difference]: Without dead ends: 272 [2021-11-07 09:58:06,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 330.61ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 09:58:06,175 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 68 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6674.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7147.91ms IncrementalHoareTripleChecker+Time [2021-11-07 09:58:06,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1071 Invalid, 226 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 3 Unknown, 0 Unchecked, 7147.91ms Time] [2021-11-07 09:58:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-07 09:58:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 212. [2021-11-07 09:58:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.2428571428571429) internal successors, (261), 211 states have internal predecessors, (261), 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) [2021-11-07 09:58:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 261 transitions. [2021-11-07 09:58:06,184 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 261 transitions. Word has length 92 [2021-11-07 09:58:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:58:06,184 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 261 transitions. [2021-11-07 09:58:06,184 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) [2021-11-07 09:58:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 261 transitions. [2021-11-07 09:58:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 09:58:06,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:58:06,185 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] [2021-11-07 09:58:06,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 09:58:06,400 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 [2021-11-07 09:58:06,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:58:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:58:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1373944701, now seen corresponding path program 1 times [2021-11-07 09:58:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:58:06,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426816045] [2021-11-07 09:58:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:06,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:58:06,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:58:06,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312024874] [2021-11-07 09:58:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:06,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:58:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:58:06,457 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) [2021-11-07 09:58:06,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 09:58:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:58:07,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 09:58:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:58:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:58:07,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:58:07,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:58:07,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426816045] [2021-11-07 09:58:07,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:58:07,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312024874] [2021-11-07 09:58:07,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312024874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:58:07,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:58:07,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 09:58:07,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237758182] [2021-11-07 09:58:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:58:07,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 09:58:07,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:58:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 09:58:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 09:58:07,349 INFO L87 Difference]: Start difference. First operand 212 states and 261 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-07 09:58:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:58:07,424 INFO L93 Difference]: Finished difference Result 353 states and 432 transitions. [2021-11-07 09:58:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 09:58:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 09:58:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:58:07,426 INFO L225 Difference]: With dead ends: 353 [2021-11-07 09:58:07,426 INFO L226 Difference]: Without dead ends: 220 [2021-11-07 09:58:07,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.92ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:58:07,427 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 2 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.17ms IncrementalHoareTripleChecker+Time [2021-11-07 09:58:07,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 697 Invalid, 18 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 48.17ms Time] [2021-11-07 09:58:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-07 09:58:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2021-11-07 09:58:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 214 states have (on average 1.2383177570093458) internal successors, (265), 215 states have internal predecessors, (265), 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) [2021-11-07 09:58:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 265 transitions. [2021-11-07 09:58:07,434 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 265 transitions. Word has length 92 [2021-11-07 09:58:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:58:07,434 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 265 transitions. [2021-11-07 09:58:07,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-07 09:58:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 265 transitions. [2021-11-07 09:58:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 09:58:07,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:58:07,435 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] [2021-11-07 09:58:07,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-07 09:58:07,651 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 [2021-11-07 09:58:07,651 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:58:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:58:07,652 INFO L85 PathProgramCache]: Analyzing trace with hash -675443141, now seen corresponding path program 1 times [2021-11-07 09:58:07,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:58:07,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138784229] [2021-11-07 09:58:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:07,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:58:07,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:58:07,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121443333] [2021-11-07 09:58:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:07,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:58:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:58:07,732 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) [2021-11-07 09:58:07,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 09:58:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:58:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 09:58:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:58:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:58:09,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:58:09,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:58:09,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138784229] [2021-11-07 09:58:09,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:58:09,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121443333] [2021-11-07 09:58:09,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121443333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:58:09,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:58:09,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-07 09:58:09,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661331931] [2021-11-07 09:58:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:58:09,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 09:58:09,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:58:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 09:58:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-07 09:58:09,863 INFO L87 Difference]: Start difference. First operand 216 states and 265 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 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) [2021-11-07 09:58:11,900 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 [] [2021-11-07 09:58:14,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:16,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:58:20,359 INFO L93 Difference]: Finished difference Result 728 states and 881 transitions. [2021-11-07 09:58:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 09:58:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 09:58:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:58:20,361 INFO L225 Difference]: With dead ends: 728 [2021-11-07 09:58:20,361 INFO L226 Difference]: Without dead ends: 605 [2021-11-07 09:58:20,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2488.06ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 09:58:20,363 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 1275 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7913.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.37ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8508.11ms IncrementalHoareTripleChecker+Time [2021-11-07 09:58:20,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 3404 Invalid, 660 Unknown, 0 Unchecked, 12.37ms Time], IncrementalHoareTripleChecker [25 Valid, 632 Invalid, 3 Unknown, 0 Unchecked, 8508.11ms Time] [2021-11-07 09:58:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-07 09:58:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 227. [2021-11-07 09:58:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.2444444444444445) internal successors, (280), 226 states have internal predecessors, (280), 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) [2021-11-07 09:58:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 280 transitions. [2021-11-07 09:58:20,373 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 280 transitions. Word has length 92 [2021-11-07 09:58:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:58:20,374 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 280 transitions. [2021-11-07 09:58:20,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 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) [2021-11-07 09:58:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 280 transitions. [2021-11-07 09:58:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 09:58:20,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:58:20,375 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] [2021-11-07 09:58:20,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 09:58:20,588 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 [2021-11-07 09:58:20,588 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:58:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:58:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash 711342269, now seen corresponding path program 1 times [2021-11-07 09:58:20,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:58:20,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596986890] [2021-11-07 09:58:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:20,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:58:20,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:58:20,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938602040] [2021-11-07 09:58:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:20,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:58:20,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:58:20,640 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) [2021-11-07 09:58:20,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 09:58:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:58:21,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 09:58:21,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:58:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:58:21,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:58:21,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:58:21,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596986890] [2021-11-07 09:58:21,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:58:21,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938602040] [2021-11-07 09:58:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938602040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:58:21,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:58:21,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 09:58:21,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614092919] [2021-11-07 09:58:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:58:21,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 09:58:21,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:58:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 09:58:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 09:58:21,600 INFO L87 Difference]: Start difference. First operand 227 states and 280 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-07 09:58:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:58:21,846 INFO L93 Difference]: Finished difference Result 425 states and 528 transitions. [2021-11-07 09:58:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 09:58:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 09:58:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:58:21,848 INFO L225 Difference]: With dead ends: 425 [2021-11-07 09:58:21,848 INFO L226 Difference]: Without dead ends: 245 [2021-11-07 09:58:21,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.39ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:58:21,849 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 28 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.33ms IncrementalHoareTripleChecker+Time [2021-11-07 09:58:21,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 668 Invalid, 73 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 207.33ms Time] [2021-11-07 09:58:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-07 09:58:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2021-11-07 09:58:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 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) [2021-11-07 09:58:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-11-07 09:58:21,858 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 92 [2021-11-07 09:58:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:58:21,858 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-11-07 09:58:21,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-07 09:58:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-11-07 09:58:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 09:58:21,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:58:21,859 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] [2021-11-07 09:58:21,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 09:58:22,059 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 [2021-11-07 09:58:22,059 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:58:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:58:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1723254047, now seen corresponding path program 1 times [2021-11-07 09:58:22,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:58:22,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253735657] [2021-11-07 09:58:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:22,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:58:22,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:58:22,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373503516] [2021-11-07 09:58:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:22,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:58:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:58:22,121 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) [2021-11-07 09:58:22,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 09:58:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:58:23,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 09:58:23,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:58:23,232 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 [2021-11-07 09:58:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:24,118 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 [2021-11-07 09:58:24,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:24,153 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 [2021-11-07 09:58:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:24,258 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 [2021-11-07 09:58:24,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:24,282 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 [2021-11-07 09:58:24,575 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 09:58:24,575 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 [2021-11-07 09:58:24,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:24,796 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 09:58:24,796 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 [2021-11-07 09:58:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:24,859 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 09:58:24,860 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 [2021-11-07 09:58:25,914 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-11-07 09:58:25,914 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 62 treesize of output 61 [2021-11-07 09:58:26,006 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-11-07 09:58:26,011 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 55 treesize of output 54 [2021-11-07 09:58:26,243 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 [2021-11-07 09:58:26,254 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 [2021-11-07 09:58:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:58:26,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:58:26,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:58:26,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253735657] [2021-11-07 09:58:26,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:58:26,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373503516] [2021-11-07 09:58:26,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373503516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:58:26,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:58:26,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-07 09:58:26,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548284240] [2021-11-07 09:58:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:58:26,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 09:58:26,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:58:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 09:58:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-07 09:58:26,615 INFO L87 Difference]: Start difference. First operand 233 states and 285 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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) [2021-11-07 09:58:28,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:30,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:32,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:35,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:37,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:39,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:58:45,201 INFO L93 Difference]: Finished difference Result 610 states and 752 transitions. [2021-11-07 09:58:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 09:58:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 [2021-11-07 09:58:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:58:45,203 INFO L225 Difference]: With dead ends: 610 [2021-11-07 09:58:45,203 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 09:58:45,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 3609.05ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 09:58:45,204 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 482 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 44 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14909.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.49ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16074.71ms IncrementalHoareTripleChecker+Time [2021-11-07 09:58:45,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 2936 Invalid, 1111 Unknown, 0 Unchecked, 12.49ms Time], IncrementalHoareTripleChecker [44 Valid, 1061 Invalid, 6 Unknown, 0 Unchecked, 16074.71ms Time] [2021-11-07 09:58:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 09:58:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 263. [2021-11-07 09:58:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 261 states have (on average 1.2298850574712643) internal successors, (321), 262 states have internal predecessors, (321), 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) [2021-11-07 09:58:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 321 transitions. [2021-11-07 09:58:45,216 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 321 transitions. Word has length 94 [2021-11-07 09:58:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:58:45,216 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 321 transitions. [2021-11-07 09:58:45,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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) [2021-11-07 09:58:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 321 transitions. [2021-11-07 09:58:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 09:58:45,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:58:45,218 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] [2021-11-07 09:58:45,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 09:58:45,431 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 [2021-11-07 09:58:45,432 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:58:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:58:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash -462336797, now seen corresponding path program 1 times [2021-11-07 09:58:45,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:58:45,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485863023] [2021-11-07 09:58:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:45,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:58:45,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:58:45,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941708862] [2021-11-07 09:58:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:45,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:58:45,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:58:45,480 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) [2021-11-07 09:58:45,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 09:58:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:58:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 09:58:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:58:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:58:46,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:58:46,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:58:46,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485863023] [2021-11-07 09:58:46,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:58:46,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941708862] [2021-11-07 09:58:46,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941708862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:58:46,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:58:46,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 09:58:46,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809119861] [2021-11-07 09:58:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:58:46,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 09:58:46,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:58:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 09:58:46,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:58:46,517 INFO L87 Difference]: Start difference. First operand 263 states and 321 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) [2021-11-07 09:58:48,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:50,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:58:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:58:51,773 INFO L93 Difference]: Finished difference Result 557 states and 682 transitions. [2021-11-07 09:58:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 09:58:51,774 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 [2021-11-07 09:58:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:58:51,775 INFO L225 Difference]: With dead ends: 557 [2021-11-07 09:58:51,775 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 09:58:51,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 268.65ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 09:58:51,776 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 99 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4695.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5067.03ms IncrementalHoareTripleChecker+Time [2021-11-07 09:58:51,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 881 Invalid, 241 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [24 Valid, 215 Invalid, 2 Unknown, 0 Unchecked, 5067.03ms Time] [2021-11-07 09:58:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 09:58:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 268. [2021-11-07 09:58:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 266 states have (on average 1.2255639097744362) internal successors, (326), 267 states have internal predecessors, (326), 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) [2021-11-07 09:58:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 326 transitions. [2021-11-07 09:58:51,788 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 326 transitions. Word has length 94 [2021-11-07 09:58:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:58:51,788 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 326 transitions. [2021-11-07 09:58:51,788 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) [2021-11-07 09:58:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 326 transitions. [2021-11-07 09:58:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 09:58:51,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:58:51,789 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] [2021-11-07 09:58:51,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 09:58:51,996 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 [2021-11-07 09:58:51,996 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:58:51,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:58:51,997 INFO L85 PathProgramCache]: Analyzing trace with hash 413682209, now seen corresponding path program 1 times [2021-11-07 09:58:51,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:58:51,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863749156] [2021-11-07 09:58:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:51,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:58:52,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:58:52,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286427325] [2021-11-07 09:58:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:58:52,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:58:52,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:58:52,048 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) [2021-11-07 09:58:52,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 09:58:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:58:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-07 09:58:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:58:53,108 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 [2021-11-07 09:58:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:53,957 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 [2021-11-07 09:58:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:53,980 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 [2021-11-07 09:58:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:54,061 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 [2021-11-07 09:58:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:54,095 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 [2021-11-07 09:58:54,351 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 09:58:54,351 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 [2021-11-07 09:58:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:54,556 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 09:58:54,557 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 [2021-11-07 09:58:54,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:58:54,627 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-07 09:58:54,628 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 [2021-11-07 09:58:55,598 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-07 09:58:55,599 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 [2021-11-07 09:58:55,639 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-07 09:58:55,640 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 [2021-11-07 09:58:55,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 09:58:55,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2021-11-07 09:58:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:58:56,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:58:56,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:58:56,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863749156] [2021-11-07 09:58:56,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:58:56,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286427325] [2021-11-07 09:58:56,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286427325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:58:56,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:58:56,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-07 09:58:56,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163904986] [2021-11-07 09:58:56,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:58:56,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 09:58:56,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:58:56,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 09:58:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-07 09:58:56,458 INFO L87 Difference]: Start difference. First operand 268 states and 326 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 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) [2021-11-07 09:58:58,496 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:00,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:02,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:05,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:07,247 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:09,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:11,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:13,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:16,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:18,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:20,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:22,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:59:30,543 INFO L93 Difference]: Finished difference Result 693 states and 845 transitions. [2021-11-07 09:59:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 09:59:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 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 [2021-11-07 09:59:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:59:30,545 INFO L225 Difference]: With dead ends: 693 [2021-11-07 09:59:30,545 INFO L226 Difference]: Without dead ends: 542 [2021-11-07 09:59:30,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 4002.81ms TimeCoverageRelationStatistics Valid=250, Invalid=1472, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 09:59:30,546 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 599 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 35 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28767.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 3727 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.73ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31270.69ms IncrementalHoareTripleChecker+Time [2021-11-07 09:59:30,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 3727 Invalid, 1695 Unknown, 0 Unchecked, 18.73ms Time], IncrementalHoareTripleChecker [35 Valid, 1648 Invalid, 12 Unknown, 0 Unchecked, 31270.69ms Time] [2021-11-07 09:59:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-07 09:59:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 275. [2021-11-07 09:59:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.2197802197802199) internal successors, (333), 274 states have internal predecessors, (333), 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) [2021-11-07 09:59:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 333 transitions. [2021-11-07 09:59:30,563 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 333 transitions. Word has length 94 [2021-11-07 09:59:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:59:30,563 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 333 transitions. [2021-11-07 09:59:30,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 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) [2021-11-07 09:59:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 333 transitions. [2021-11-07 09:59:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 09:59:30,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:59:30,565 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] [2021-11-07 09:59:30,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 09:59:30,775 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 [2021-11-07 09:59:30,775 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:59:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:59:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash 53717091, now seen corresponding path program 1 times [2021-11-07 09:59:30,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:59:30,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875882311] [2021-11-07 09:59:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:59:30,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:59:30,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:59:30,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395859614] [2021-11-07 09:59:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:59:30,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:59:30,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:59:30,833 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) [2021-11-07 09:59:30,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 09:59:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:59:31,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 09:59:31,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:59:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:59:31,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:59:31,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:59:31,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875882311] [2021-11-07 09:59:31,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:59:31,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395859614] [2021-11-07 09:59:31,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395859614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:59:31,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:59:31,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 09:59:31,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334130449] [2021-11-07 09:59:31,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:59:31,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 09:59:31,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:59:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 09:59:31,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 09:59:31,697 INFO L87 Difference]: Start difference. First operand 275 states and 333 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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) [2021-11-07 09:59:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:59:31,772 INFO L93 Difference]: Finished difference Result 423 states and 511 transitions. [2021-11-07 09:59:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 09:59:31,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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 [2021-11-07 09:59:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:59:31,774 INFO L225 Difference]: With dead ends: 423 [2021-11-07 09:59:31,774 INFO L226 Difference]: Without dead ends: 272 [2021-11-07 09:59:31,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.55ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 09:59:31,775 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 2 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.85ms IncrementalHoareTripleChecker+Time [2021-11-07 09:59:31,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 696 Invalid, 16 Unknown, 0 Unchecked, 0.47ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 43.85ms Time] [2021-11-07 09:59:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-07 09:59:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2021-11-07 09:59:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.2097378277153559) internal successors, (323), 268 states have internal predecessors, (323), 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) [2021-11-07 09:59:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 323 transitions. [2021-11-07 09:59:31,793 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 323 transitions. Word has length 94 [2021-11-07 09:59:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:59:31,794 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 323 transitions. [2021-11-07 09:59:31,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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) [2021-11-07 09:59:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 323 transitions. [2021-11-07 09:59:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 09:59:31,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:59:31,795 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, 1] [2021-11-07 09:59:31,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 09:59:32,011 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 [2021-11-07 09:59:32,012 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:59:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:59:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash -955936525, now seen corresponding path program 1 times [2021-11-07 09:59:32,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:59:32,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722289993] [2021-11-07 09:59:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:59:32,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:59:32,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:59:32,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368434673] [2021-11-07 09:59:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:59:32,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:59:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:59:32,078 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) [2021-11-07 09:59:32,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 09:59:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:59:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 2754 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 09:59:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:59:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:59:33,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:59:33,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:59:33,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722289993] [2021-11-07 09:59:33,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:59:33,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368434673] [2021-11-07 09:59:33,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368434673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:59:33,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:59:33,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 09:59:33,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836761386] [2021-11-07 09:59:33,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:59:33,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 09:59:33,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:59:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 09:59:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 09:59:33,155 INFO L87 Difference]: Start difference. First operand 269 states and 323 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 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) [2021-11-07 09:59:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 09:59:34,177 INFO L93 Difference]: Finished difference Result 633 states and 755 transitions. [2021-11-07 09:59:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 09:59:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 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 95 [2021-11-07 09:59:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 09:59:34,179 INFO L225 Difference]: With dead ends: 633 [2021-11-07 09:59:34,179 INFO L226 Difference]: Without dead ends: 498 [2021-11-07 09:59:34,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 537.97ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-07 09:59:34,180 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 300 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 571.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.49ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 606.80ms IncrementalHoareTripleChecker+Time [2021-11-07 09:59:34,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 2849 Invalid, 231 Unknown, 0 Unchecked, 4.49ms Time], IncrementalHoareTripleChecker [12 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 606.80ms Time] [2021-11-07 09:59:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-07 09:59:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 269. [2021-11-07 09:59:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.205992509363296) internal successors, (322), 268 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) [2021-11-07 09:59:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 322 transitions. [2021-11-07 09:59:34,193 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 322 transitions. Word has length 95 [2021-11-07 09:59:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 09:59:34,193 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 322 transitions. [2021-11-07 09:59:34,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 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) [2021-11-07 09:59:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 322 transitions. [2021-11-07 09:59:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 09:59:34,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 09:59:34,195 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] [2021-11-07 09:59:34,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 09:59:34,411 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 [2021-11-07 09:59:34,411 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 09:59:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 09:59:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1136218909, now seen corresponding path program 1 times [2021-11-07 09:59:34,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 09:59:34,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078783722] [2021-11-07 09:59:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:59:34,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 09:59:34,467 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 09:59:34,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797691683] [2021-11-07 09:59:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 09:59:34,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 09:59:34,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 09:59:34,469 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) [2021-11-07 09:59:34,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 09:59:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 09:59:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 151 conjunts are in the unsatisfiable core [2021-11-07 09:59:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 09:59:35,735 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 [2021-11-07 09:59:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:36,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-07 09:59:37,124 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 09:59:37,124 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 [2021-11-07 09:59:37,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,372 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 43 treesize of output 30 [2021-11-07 09:59:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,685 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 43 treesize of output 30 [2021-11-07 09:59:37,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:37,830 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 30 [2021-11-07 09:59:38,276 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 09:59:38,276 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 [2021-11-07 09:59:38,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 09:59:38,488 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-07 09:59:38,489 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 41 treesize of output 43 [2021-11-07 09:59:47,534 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 33 treesize of output 35 [2021-11-07 09:59:54,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 09:59:54,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 41 [2021-11-07 09:59:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 09:59:55,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 09:59:55,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 09:59:55,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078783722] [2021-11-07 09:59:55,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 09:59:55,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797691683] [2021-11-07 09:59:55,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797691683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 09:59:55,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 09:59:55,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-07 09:59:55,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989742621] [2021-11-07 09:59:55,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 09:59:55,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 09:59:55,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 09:59:55,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 09:59:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=429, Unknown=3, NotChecked=0, Total=506 [2021-11-07 09:59:55,408 INFO L87 Difference]: Start difference. First operand 269 states and 322 transitions. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-11-07 09:59:57,464 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 09:59:59,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 10:00:01,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 10:00:04,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 10:00:06,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 10:00:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 10:00:34,923 INFO L93 Difference]: Finished difference Result 554 states and 666 transitions. [2021-11-07 10:00:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 10:00:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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 97 [2021-11-07 10:00:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 10:00:34,926 INFO L225 Difference]: With dead ends: 554 [2021-11-07 10:00:34,926 INFO L226 Difference]: Without dead ends: 425 [2021-11-07 10:00:34,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 42903.30ms TimeCoverageRelationStatistics Valid=127, Invalid=858, Unknown=7, NotChecked=0, Total=992 [2021-11-07 10:00:34,927 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 320 mSDsluCounter, 2899 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 28 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11730.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.77ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 12935.80ms IncrementalHoareTripleChecker+Time [2021-11-07 10:00:34,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 3194 Invalid, 1103 Unknown, 0 Unchecked, 17.77ms Time], IncrementalHoareTripleChecker [28 Valid, 410 Invalid, 5 Unknown, 660 Unchecked, 12935.80ms Time] [2021-11-07 10:00:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-07 10:00:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 317. [2021-11-07 10:00:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 315 states have (on average 1.2126984126984126) internal successors, (382), 316 states have internal predecessors, (382), 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) [2021-11-07 10:00:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 382 transitions. [2021-11-07 10:00:34,943 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 382 transitions. Word has length 97 [2021-11-07 10:00:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 10:00:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 382 transitions. [2021-11-07 10:00:34,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-11-07 10:00:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 382 transitions. [2021-11-07 10:00:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 10:00:34,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 10:00:34,944 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] [2021-11-07 10:00:34,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 10:00:35,145 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 [2021-11-07 10:00:35,145 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 10:00:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 10:00:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1279617441, now seen corresponding path program 1 times [2021-11-07 10:00:35,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 10:00:35,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364593982] [2021-11-07 10:00:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 10:00:35,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 10:00:35,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 10:00:35,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558583802] [2021-11-07 10:00:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 10:00:35,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 10:00:35,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 10:00:35,205 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) [2021-11-07 10:00:35,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process Killed by 15