./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.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 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 22:55:06,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 22:55:06,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 22:55:06,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 22:55:06,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 22:55:06,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 22:55:06,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 22:55:06,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 22:55:06,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 22:55:06,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 22:55:06,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 22:55:06,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 22:55:06,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 22:55:06,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 22:55:06,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 22:55:06,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 22:55:06,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 22:55:06,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 22:55:06,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 22:55:06,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 22:55:06,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 22:55:06,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 22:55:06,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 22:55:06,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 22:55:06,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 22:55:06,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 22:55:06,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 22:55:06,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 22:55:06,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 22:55:06,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 22:55:06,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 22:55:06,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 22:55:06,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 22:55:06,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 22:55:06,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 22:55:06,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 22:55:06,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 22:55:06,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 22:55:06,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 22:55:06,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 22:55:06,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 22:55:06,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 22:55:06,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 22:55:06,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 22:55:06,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 22:55:06,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 22:55:06,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 22:55:06,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 22:55:06,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 22:55:06,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 22:55:06,552 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 22:55:06,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 22:55:06,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 22:55:06,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 22:55:06,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 22:55:06,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 22:55:06,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 22:55:06,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 22:55:06,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 22:55:06,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 22:55:06,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 22:55:06,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 22:55:06,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 22:55:06,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 22:55:06,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 22:55:06,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 22:55:06,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 22:55:06,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 22:55:06,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 22:55:06,557 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 22:55:06,557 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 22:55:06,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 22:55:06,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 22:55:06,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2021-11-16 22:55:06,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 22:55:06,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 22:55:06,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 22:55:06,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 22:55:06,852 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 22:55:06,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-16 22:55:06,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfe9f17a/43b3949175544174bbdc8d7095715acf/FLAG330ef2f50 [2021-11-16 22:55:07,584 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 22:55:07,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-16 22:55:07,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfe9f17a/43b3949175544174bbdc8d7095715acf/FLAG330ef2f50 [2021-11-16 22:55:07,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfe9f17a/43b3949175544174bbdc8d7095715acf [2021-11-16 22:55:07,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 22:55:07,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 22:55:07,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 22:55:07,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 22:55:07,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 22:55:07,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:55:07" (1/1) ... [2021-11-16 22:55:07,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712f43e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:07, skipping insertion in model container [2021-11-16 22:55:07,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:55:07" (1/1) ... [2021-11-16 22:55:07,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 22:55:07,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 22:55:08,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-16 22:55:08,983 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 22:55:09,005 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 22:55:09,272 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-16 22:55:09,284 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 22:55:09,329 INFO L208 MainTranslator]: Completed translation [2021-11-16 22:55:09,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09 WrapperNode [2021-11-16 22:55:09,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 22:55:09,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 22:55:09,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 22:55:09,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 22:55:09,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,526 INFO L137 Inliner]: procedures = 186, calls = 1465, calls flagged for inlining = 91, calls inlined = 88, statements flattened = 4137 [2021-11-16 22:55:09,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 22:55:09,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 22:55:09,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 22:55:09,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 22:55:09,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 22:55:09,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 22:55:09,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 22:55:09,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 22:55:09,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (1/1) ... [2021-11-16 22:55:09,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 22:55:09,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:55:09,789 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) [2021-11-16 22:55:09,812 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 [2021-11-16 22:55:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_sw [2021-11-16 22:55:09,829 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_sw [2021-11-16 22:55:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_file_remove [2021-11-16 22:55:09,829 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_file_remove [2021-11-16 22:55:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-16 22:55:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-16 22:55:09,830 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-16 22:55:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2021-11-16 22:55:09,830 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2021-11-16 22:55:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_find_numid [2021-11-16 22:55:09,830 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_find_numid [2021-11-16 22:55:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv [2021-11-16 22:55:09,831 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv [2021-11-16 22:55:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 22:55:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-16 22:55:09,831 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-16 22:55:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_input [2021-11-16 22:55:09,831 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_input [2021-11-16 22:55:09,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-16 22:55:09,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-16 22:55:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-16 22:55:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-16 22:55:09,832 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-16 22:55:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_test_id [2021-11-16 22:55:09,832 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_test_id [2021-11-16 22:55:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 22:55:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-16 22:55:09,833 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-16 22:55:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-16 22:55:09,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-16 22:55:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-16 22:55:09,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-16 22:55:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_vol [2021-11-16 22:55:09,833 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_vol [2021-11-16 22:55:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure snd_info_free_entry [2021-11-16 22:55:09,834 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_info_free_entry [2021-11-16 22:55:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-16 22:55:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-16 22:55:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-16 22:55:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-16 22:55:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_release [2021-11-16 22:55:09,835 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_release [2021-11-16 22:55:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 22:55:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv2 [2021-11-16 22:55:09,836 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv2 [2021-11-16 22:55:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv1 [2021-11-16 22:55:09,836 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv1 [2021-11-16 22:55:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-16 22:55:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2021-11-16 22:55:09,836 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2021-11-16 22:55:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 22:55:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_held [2021-11-16 22:55:09,837 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_held [2021-11-16 22:55:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-16 22:55:09,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-16 22:55:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 22:55:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 22:55:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-16 22:55:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure mixer_slot_clear [2021-11-16 22:55:09,839 INFO L138 BoogieDeclarations]: Found implementation of procedure mixer_slot_clear [2021-11-16 22:55:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_notify [2021-11-16 22:55:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_notify [2021-11-16 22:55:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-16 22:55:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-16 22:55:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_ioctl1 [2021-11-16 22:55:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_ioctl1 [2021-11-16 22:55:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2021-11-16 22:55:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2021-11-16 22:55:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-16 22:55:09,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-16 22:55:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 22:55:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-16 22:55:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-16 22:55:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-16 22:55:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-16 22:55:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_sw [2021-11-16 22:55:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_sw [2021-11-16 22:55:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-16 22:55:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-16 22:55:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 22:55:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 22:55:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_test [2021-11-16 22:55:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_test [2021-11-16 22:55:09,843 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-16 22:55:09,843 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-16 22:55:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-16 22:55:09,844 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-16 22:55:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure snd_oss_info_register [2021-11-16 22:55:09,844 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_oss_info_register [2021-11-16 22:55:09,844 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_vol [2021-11-16 22:55:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_vol [2021-11-16 22:55:09,845 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_notify_handler [2021-11-16 22:55:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_notify_handler [2021-11-16 22:55:09,845 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-16 22:55:09,845 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-16 22:55:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-16 22:55:09,846 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-16 22:55:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-16 22:55:09,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-16 22:55:09,847 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_dereference [2021-11-16 22:55:09,847 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_dereference [2021-11-16 22:55:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_open [2021-11-16 22:55:09,848 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_open [2021-11-16 22:55:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 22:55:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-16 22:55:09,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-16 22:55:09,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 22:55:09,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 22:55:10,416 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 22:55:10,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 22:55:21,575 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 22:55:21,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 22:55:21,589 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-16 22:55:21,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:55:21 BoogieIcfgContainer [2021-11-16 22:55:21,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 22:55:21,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 22:55:21,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 22:55:21,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 22:55:21,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:55:07" (1/3) ... [2021-11-16 22:55:21,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642ee660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:55:21, skipping insertion in model container [2021-11-16 22:55:21,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:09" (2/3) ... [2021-11-16 22:55:21,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642ee660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:55:21, skipping insertion in model container [2021-11-16 22:55:21,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:55:21" (3/3) ... [2021-11-16 22:55:21,600 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-16 22:55:21,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 22:55:21,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 22:55:21,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 22:55:21,673 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 [2021-11-16 22:55:21,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 22:55:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 1195 states, 892 states have (on average 1.4663677130044843) internal successors, (1308), 909 states have internal predecessors, (1308), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) [2021-11-16 22:55:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-16 22:55:21,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:55:21,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:55:21,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:55:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:55:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1121566205, now seen corresponding path program 1 times [2021-11-16 22:55:21,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:55:21,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186060650] [2021-11-16 22:55:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:21,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:55:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:22,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:55:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 22:55:22,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:55:22,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186060650] [2021-11-16 22:55:22,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186060650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:55:22,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:55:22,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 22:55:22,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125797163] [2021-11-16 22:55:22,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:55:22,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 22:55:22,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:55:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 22:55:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:55:22,263 INFO L87 Difference]: Start difference. First operand has 1195 states, 892 states have (on average 1.4663677130044843) internal successors, (1308), 909 states have internal predecessors, (1308), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 22:55:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:55:22,608 INFO L93 Difference]: Finished difference Result 2330 states and 3667 transitions. [2021-11-16 22:55:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 22:55:22,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-16 22:55:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:55:22,637 INFO L225 Difference]: With dead ends: 2330 [2021-11-16 22:55:22,637 INFO L226 Difference]: Without dead ends: 1136 [2021-11-16 22:55:22,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:55:22,659 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 5 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 22:55:22,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3413 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 22:55:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-16 22:55:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1131. [2021-11-16 22:55:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 839 states have (on average 1.4505363528009536) internal successors, (1217), 852 states have internal predecessors, (1217), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-16 22:55:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1708 transitions. [2021-11-16 22:55:22,820 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1708 transitions. Word has length 14 [2021-11-16 22:55:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:55:22,821 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1708 transitions. [2021-11-16 22:55:22,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 22:55:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1708 transitions. [2021-11-16 22:55:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-16 22:55:22,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:55:22,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:55:22,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 22:55:22,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:55:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:55:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash 645647086, now seen corresponding path program 1 times [2021-11-16 22:55:22,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:55:22,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094962166] [2021-11-16 22:55:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:22,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:55:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:23,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:55:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 22:55:23,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:55:23,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094962166] [2021-11-16 22:55:23,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094962166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 22:55:23,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480738351] [2021-11-16 22:55:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:23,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:55:23,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:55:23,031 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) [2021-11-16 22:55:23,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-16 22:55:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:23,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 22:55:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:55:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 22:55:23,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:55:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-16 22:55:23,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480738351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:55:23,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 22:55:23,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-16 22:55:23,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592564269] [2021-11-16 22:55:23,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 22:55:23,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 22:55:23,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:55:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 22:55:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-16 22:55:23,823 INFO L87 Difference]: Start difference. First operand 1131 states and 1708 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 22:55:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:55:24,052 INFO L93 Difference]: Finished difference Result 2268 states and 3427 transitions. [2021-11-16 22:55:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 22:55:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-16 22:55:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:55:24,062 INFO L225 Difference]: With dead ends: 2268 [2021-11-16 22:55:24,062 INFO L226 Difference]: Without dead ends: 1149 [2021-11-16 22:55:24,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-16 22:55:24,069 INFO L933 BasicCegarLoop]: 1706 mSDtfsCounter, 24 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5110 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 22:55:24,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 5110 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 22:55:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-16 22:55:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2021-11-16 22:55:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 854 states have (on average 1.446135831381733) internal successors, (1235), 867 states have internal predecessors, (1235), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-16 22:55:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1732 transitions. [2021-11-16 22:55:24,133 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1732 transitions. Word has length 18 [2021-11-16 22:55:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:55:24,133 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1732 transitions. [2021-11-16 22:55:24,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 22:55:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1732 transitions. [2021-11-16 22:55:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-16 22:55:24,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:55:24,141 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:55:24,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-16 22:55:24,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:55:24,368 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:55:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:55:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1066609489, now seen corresponding path program 2 times [2021-11-16 22:55:24,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:55:24,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428521018] [2021-11-16 22:55:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:24,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:55:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:55:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-16 22:55:24,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:55:24,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428521018] [2021-11-16 22:55:24,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428521018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:55:24,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:55:24,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 22:55:24,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530322070] [2021-11-16 22:55:24,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:55:24,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 22:55:24,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:55:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 22:55:24,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 22:55:24,559 INFO L87 Difference]: Start difference. First operand 1149 states and 1732 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 22:55:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:55:24,674 INFO L93 Difference]: Finished difference Result 1154 states and 1736 transitions. [2021-11-16 22:55:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 22:55:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-16 22:55:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:55:24,682 INFO L225 Difference]: With dead ends: 1154 [2021-11-16 22:55:24,683 INFO L226 Difference]: Without dead ends: 1149 [2021-11-16 22:55:24,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 22:55:24,688 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 75 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 5021 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 22:55:24,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 5021 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 22:55:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-16 22:55:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2021-11-16 22:55:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 854 states have (on average 1.4449648711943794) internal successors, (1234), 867 states have internal predecessors, (1234), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-16 22:55:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1731 transitions. [2021-11-16 22:55:24,735 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1731 transitions. Word has length 30 [2021-11-16 22:55:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:55:24,736 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1731 transitions. [2021-11-16 22:55:24,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-16 22:55:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1731 transitions. [2021-11-16 22:55:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-16 22:55:24,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:55:24,738 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:55:24,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-16 22:55:24,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:55:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:55:24,739 INFO L85 PathProgramCache]: Analyzing trace with hash 330312657, now seen corresponding path program 1 times [2021-11-16 22:55:24,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:55:24,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342282494] [2021-11-16 22:55:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:24,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:55:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:24,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:55:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:24,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 22:55:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-16 22:55:24,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:55:24,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342282494] [2021-11-16 22:55:24,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342282494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:55:24,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:55:24,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 22:55:24,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283639889] [2021-11-16 22:55:24,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:55:24,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 22:55:24,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:55:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 22:55:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:55:24,872 INFO L87 Difference]: Start difference. First operand 1149 states and 1731 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-16 22:55:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:55:24,955 INFO L93 Difference]: Finished difference Result 1161 states and 1745 transitions. [2021-11-16 22:55:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 22:55:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-11-16 22:55:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:55:24,963 INFO L225 Difference]: With dead ends: 1161 [2021-11-16 22:55:24,963 INFO L226 Difference]: Without dead ends: 1155 [2021-11-16 22:55:24,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:55:24,965 INFO L933 BasicCegarLoop]: 1703 mSDtfsCounter, 5 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3403 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 22:55:24,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3403 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 22:55:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-11-16 22:55:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1150. [2021-11-16 22:55:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 855 states have (on average 1.4444444444444444) internal successors, (1235), 868 states have internal predecessors, (1235), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-16 22:55:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1732 transitions. [2021-11-16 22:55:25,007 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1732 transitions. Word has length 38 [2021-11-16 22:55:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:55:25,008 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1732 transitions. [2021-11-16 22:55:25,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-16 22:55:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1732 transitions. [2021-11-16 22:55:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-16 22:55:25,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:55:25,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:55:25,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-16 22:55:25,011 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:55:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:55:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash 631398726, now seen corresponding path program 1 times [2021-11-16 22:55:25,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:55:25,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598099613] [2021-11-16 22:55:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:25,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:55:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:25,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:55:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:25,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-16 22:55:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 22:55:25,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:55:25,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598099613] [2021-11-16 22:55:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598099613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:55:25,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:55:25,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 22:55:25,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594006482] [2021-11-16 22:55:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:55:25,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 22:55:25,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:55:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 22:55:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:55:25,159 INFO L87 Difference]: Start difference. First operand 1150 states and 1732 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-16 22:55:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:55:25,756 INFO L93 Difference]: Finished difference Result 1925 states and 2934 transitions. [2021-11-16 22:55:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 22:55:25,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-11-16 22:55:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:55:25,768 INFO L225 Difference]: With dead ends: 1925 [2021-11-16 22:55:25,768 INFO L226 Difference]: Without dead ends: 1918 [2021-11-16 22:55:25,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:55:25,770 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 1110 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 3527 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-16 22:55:25,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 3527 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-16 22:55:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-16 22:55:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2021-11-16 22:55:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1464 states have (on average 1.4576502732240437) internal successors, (2134), 1486 states have internal predecessors, (2134), 376 states have call successors, (376), 78 states have call predecessors, (376), 75 states have return successors, (414), 366 states have call predecessors, (414), 373 states have call successors, (414) [2021-11-16 22:55:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2924 transitions. [2021-11-16 22:55:25,852 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2924 transitions. Word has length 42 [2021-11-16 22:55:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:55:25,856 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2924 transitions. [2021-11-16 22:55:25,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-16 22:55:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2924 transitions. [2021-11-16 22:55:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-16 22:55:25,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:55:25,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:55:25,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-16 22:55:25,862 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:55:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:55:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash 492616272, now seen corresponding path program 1 times [2021-11-16 22:55:25,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:55:25,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323197200] [2021-11-16 22:55:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:25,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:55:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:55:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 22:55:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 22:55:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 22:55:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 22:55:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 22:55:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 22:55:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:55:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-16 22:55:26,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:55:26,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323197200] [2021-11-16 22:55:26,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323197200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:55:26,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:55:26,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-16 22:55:26,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873062756] [2021-11-16 22:55:26,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:55:26,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-16 22:55:26,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:55:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-16 22:55:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-16 22:55:26,696 INFO L87 Difference]: Start difference. First operand 1916 states and 2924 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 22:55:30,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:55:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:55:50,751 INFO L93 Difference]: Finished difference Result 4493 states and 7130 transitions. [2021-11-16 22:55:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 22:55:50,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 88 [2021-11-16 22:55:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:55:50,776 INFO L225 Difference]: With dead ends: 4493 [2021-11-16 22:55:50,776 INFO L226 Difference]: Without dead ends: 2632 [2021-11-16 22:55:50,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-11-16 22:55:50,792 INFO L933 BasicCegarLoop]: 1893 mSDtfsCounter, 2486 mSDsluCounter, 9625 mSDsCounter, 0 mSdLazyCounter, 4870 mSolverCounterSat, 1076 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2623 SdHoareTripleChecker+Valid, 11518 SdHoareTripleChecker+Invalid, 5947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 4870 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2021-11-16 22:55:50,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2623 Valid, 11518 Invalid, 5947 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1076 Valid, 4870 Invalid, 1 Unknown, 0 Unchecked, 22.4s Time] [2021-11-16 22:55:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-11-16 22:55:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2152. [2021-11-16 22:55:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1651 states have (on average 1.4470018170805572) internal successors, (2389), 1671 states have internal predecessors, (2389), 415 states have call successors, (415), 78 states have call predecessors, (415), 85 states have return successors, (531), 417 states have call predecessors, (531), 412 states have call successors, (531) [2021-11-16 22:55:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3335 transitions. [2021-11-16 22:55:50,928 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3335 transitions. Word has length 88 [2021-11-16 22:55:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:55:50,929 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3335 transitions. [2021-11-16 22:55:50,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-16 22:55:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3335 transitions. [2021-11-16 22:55:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-16 22:55:50,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:55:50,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:55:50,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-16 22:55:50,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:55:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:55:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1386102610, now seen corresponding path program 1 times [2021-11-16 22:55:50,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:55:50,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011795293] [2021-11-16 22:55:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:50,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:55:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:55:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-16 22:55:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 22:55:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-16 22:55:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 22:55:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-16 22:55:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-16 22:55:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:55:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 22:55:51,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:55:51,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011795293] [2021-11-16 22:55:51,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011795293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 22:55:51,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148682468] [2021-11-16 22:55:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:55:51,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:55:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:55:51,464 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) [2021-11-16 22:55:51,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-16 22:55:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:55:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 22:55:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:55:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-16 22:55:52,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:55:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 22:55:53,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148682468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:55:53,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 22:55:53,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2021-11-16 22:55:53,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681277696] [2021-11-16 22:55:53,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 22:55:53,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-16 22:55:53,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:55:53,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-16 22:55:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-11-16 22:55:53,199 INFO L87 Difference]: Start difference. First operand 2152 states and 3335 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:55:56,417 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 [] [2021-11-16 22:56:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:56:09,010 INFO L93 Difference]: Finished difference Result 4797 states and 7649 transitions. [2021-11-16 22:56:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-16 22:56:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2021-11-16 22:56:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:56:09,032 INFO L225 Difference]: With dead ends: 4797 [2021-11-16 22:56:09,033 INFO L226 Difference]: Without dead ends: 2696 [2021-11-16 22:56:09,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-16 22:56:09,047 INFO L933 BasicCegarLoop]: 1904 mSDtfsCounter, 1781 mSDsluCounter, 5865 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 922 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 7769 SdHoareTripleChecker+Invalid, 3900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-16 22:56:09,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 7769 Invalid, 3900 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [922 Valid, 2977 Invalid, 1 Unknown, 0 Unchecked, 15.4s Time] [2021-11-16 22:56:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-11-16 22:56:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2224. [2021-11-16 22:56:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1711 states have (on average 1.4383401519579193) internal successors, (2461), 1731 states have internal predecessors, (2461), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-16 22:56:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3443 transitions. [2021-11-16 22:56:09,158 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3443 transitions. Word has length 88 [2021-11-16 22:56:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:56:09,158 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3443 transitions. [2021-11-16 22:56:09,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:56:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3443 transitions. [2021-11-16 22:56:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-16 22:56:09,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:56:09,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:56:09,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-16 22:56:09,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-16 22:56:09,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:56:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:56:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1024798374, now seen corresponding path program 1 times [2021-11-16 22:56:09,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:56:09,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577608300] [2021-11-16 22:56:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:09,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:56:09,444 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:56:09,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191508346] [2021-11-16 22:56:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:09,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:09,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:56:09,448 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) [2021-11-16 22:56:09,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-16 22:56:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-16 22:56:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:56:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 22:56:10,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 22:56:10,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:56:10,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577608300] [2021-11-16 22:56:10,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:56:10,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191508346] [2021-11-16 22:56:10,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191508346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:56:10,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:56:10,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 22:56:10,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767242502] [2021-11-16 22:56:10,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:56:10,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 22:56:10,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:56:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 22:56:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:56:10,377 INFO L87 Difference]: Start difference. First operand 2224 states and 3443 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 22:56:12,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:56:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:56:12,494 INFO L93 Difference]: Finished difference Result 4443 states and 6929 transitions. [2021-11-16 22:56:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 22:56:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2021-11-16 22:56:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:56:12,845 INFO L225 Difference]: With dead ends: 4443 [2021-11-16 22:56:12,846 INFO L226 Difference]: Without dead ends: 2228 [2021-11-16 22:56:12,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:56:12,862 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-16 22:56:12,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 3405 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-11-16 22:56:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-11-16 22:56:12,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2226. [2021-11-16 22:56:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 1713 states have (on average 1.4378283712784588) internal successors, (2463), 1733 states have internal predecessors, (2463), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-16 22:56:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3445 transitions. [2021-11-16 22:56:12,967 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3445 transitions. Word has length 92 [2021-11-16 22:56:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:56:12,967 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 3445 transitions. [2021-11-16 22:56:12,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 22:56:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3445 transitions. [2021-11-16 22:56:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-16 22:56:12,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:56:12,976 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:56:13,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-16 22:56:13,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:13,198 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:56:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:56:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1125315305, now seen corresponding path program 1 times [2021-11-16 22:56:13,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:56:13,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928314072] [2021-11-16 22:56:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:13,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:56:13,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:56:13,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325397809] [2021-11-16 22:56:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:13,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:13,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:56:13,236 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) [2021-11-16 22:56:13,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-16 22:56:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 22:56:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:56:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 22:56:14,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:56:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-16 22:56:14,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:56:14,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928314072] [2021-11-16 22:56:14,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:56:14,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325397809] [2021-11-16 22:56:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325397809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:56:14,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 22:56:14,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-16 22:56:14,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457595662] [2021-11-16 22:56:14,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 22:56:14,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 22:56:14,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:56:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 22:56:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-16 22:56:14,594 INFO L87 Difference]: Start difference. First operand 2226 states and 3445 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-16 22:56:16,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:56:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:56:16,838 INFO L93 Difference]: Finished difference Result 4455 states and 6945 transitions. [2021-11-16 22:56:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 22:56:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 98 [2021-11-16 22:56:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:56:16,857 INFO L225 Difference]: With dead ends: 4455 [2021-11-16 22:56:16,857 INFO L226 Difference]: Without dead ends: 2238 [2021-11-16 22:56:16,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-16 22:56:16,872 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 6 mSDsluCounter, 3402 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5106 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-16 22:56:16,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 5106 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-16 22:56:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-11-16 22:56:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2238. [2021-11-16 22:56:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 1725 states have (on average 1.434782608695652) internal successors, (2475), 1745 states have internal predecessors, (2475), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-16 22:56:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 3457 transitions. [2021-11-16 22:56:16,975 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 3457 transitions. Word has length 98 [2021-11-16 22:56:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:56:16,976 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 3457 transitions. [2021-11-16 22:56:16,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-16 22:56:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 3457 transitions. [2021-11-16 22:56:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-16 22:56:16,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:56:16,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:56:17,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-16 22:56:17,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:17,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:56:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:56:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash 692597909, now seen corresponding path program 2 times [2021-11-16 22:56:17,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:56:17,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086308443] [2021-11-16 22:56:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:17,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:56:17,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:56:17,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010338706] [2021-11-16 22:56:17,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 22:56:17,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:56:17,247 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) [2021-11-16 22:56:17,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-16 22:56:25,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-16 22:56:25,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 22:56:25,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-16 22:56:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:56:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-16 22:56:25,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 22:56:25,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:56:25,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086308443] [2021-11-16 22:56:25,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:56:25,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010338706] [2021-11-16 22:56:25,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010338706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:56:25,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:56:25,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-16 22:56:25,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760509390] [2021-11-16 22:56:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:56:25,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 22:56:25,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:56:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 22:56:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-16 22:56:25,716 INFO L87 Difference]: Start difference. First operand 2238 states and 3457 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 22:56:28,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:56:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:56:28,284 INFO L93 Difference]: Finished difference Result 4475 states and 6982 transitions. [2021-11-16 22:56:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 22:56:28,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-16 22:56:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:56:28,300 INFO L225 Difference]: With dead ends: 4475 [2021-11-16 22:56:28,301 INFO L226 Difference]: Without dead ends: 2246 [2021-11-16 22:56:28,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-16 22:56:28,315 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 5 mSDsluCounter, 3398 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5106 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 22:56:28,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 5106 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-16 22:56:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-11-16 22:56:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2242. [2021-11-16 22:56:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1729 states have (on average 1.4337767495662233) internal successors, (2479), 1749 states have internal predecessors, (2479), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-16 22:56:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3461 transitions. [2021-11-16 22:56:28,405 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3461 transitions. Word has length 104 [2021-11-16 22:56:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:56:28,406 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3461 transitions. [2021-11-16 22:56:28,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-16 22:56:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3461 transitions. [2021-11-16 22:56:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-16 22:56:28,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:56:28,410 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:56:28,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-16 22:56:28,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-16 22:56:28,636 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:56:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:56:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1472243980, now seen corresponding path program 1 times [2021-11-16 22:56:28,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:56:28,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493097650] [2021-11-16 22:56:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:28,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:56:28,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:56:28,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726404964] [2021-11-16 22:56:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:28,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:56:28,678 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) [2021-11-16 22:56:28,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-16 22:56:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 22:56:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:56:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-16 22:56:29,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:56:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 22:56:30,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:56:30,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493097650] [2021-11-16 22:56:30,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:56:30,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726404964] [2021-11-16 22:56:30,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726404964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:56:30,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 22:56:30,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-16 22:56:30,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291200979] [2021-11-16 22:56:30,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 22:56:30,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 22:56:30,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:56:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 22:56:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-16 22:56:30,547 INFO L87 Difference]: Start difference. First operand 2242 states and 3461 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 22:56:32,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:56:35,123 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 [] [2021-11-16 22:56:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:56:35,186 INFO L93 Difference]: Finished difference Result 4499 states and 6995 transitions. [2021-11-16 22:56:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 22:56:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 119 [2021-11-16 22:56:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:56:35,250 INFO L225 Difference]: With dead ends: 4499 [2021-11-16 22:56:35,250 INFO L226 Difference]: Without dead ends: 2266 [2021-11-16 22:56:35,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-16 22:56:35,265 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 10 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6807 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-16 22:56:35,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6807 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2021-11-16 22:56:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-11-16 22:56:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2266. [2021-11-16 22:56:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 1753 states have (on average 1.4278379920136908) internal successors, (2503), 1773 states have internal predecessors, (2503), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-16 22:56:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 3485 transitions. [2021-11-16 22:56:35,353 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 3485 transitions. Word has length 119 [2021-11-16 22:56:35,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:56:35,353 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 3485 transitions. [2021-11-16 22:56:35,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 22:56:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 3485 transitions. [2021-11-16 22:56:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-16 22:56:35,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:56:35,359 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:56:35,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-16 22:56:35,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:35,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:56:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:56:35,580 INFO L85 PathProgramCache]: Analyzing trace with hash -394245464, now seen corresponding path program 1 times [2021-11-16 22:56:35,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:56:35,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153621812] [2021-11-16 22:56:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:35,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:56:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:56:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-16 22:56:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-16 22:56:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-16 22:56:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-16 22:56:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-16 22:56:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-16 22:56:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:56:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 22:56:36,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:56:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153621812] [2021-11-16 22:56:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153621812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 22:56:36,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323730203] [2021-11-16 22:56:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:56:36,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:56:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:56:36,600 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) [2021-11-16 22:56:36,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-16 22:56:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:56:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 22:56:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:56:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-16 22:56:37,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:56:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 22:56:39,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323730203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:56:39,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 22:56:39,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2021-11-16 22:56:39,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150876394] [2021-11-16 22:56:39,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 22:56:39,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-16 22:56:39,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:56:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-16 22:56:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-11-16 22:56:40,003 INFO L87 Difference]: Start difference. First operand 2266 states and 3485 transitions. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:56:45,100 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 [] [2021-11-16 22:57:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:57:04,840 INFO L93 Difference]: Finished difference Result 5025 states and 7961 transitions. [2021-11-16 22:57:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-16 22:57:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-11-16 22:57:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:57:04,860 INFO L225 Difference]: With dead ends: 5025 [2021-11-16 22:57:04,861 INFO L226 Difference]: Without dead ends: 2882 [2021-11-16 22:57:04,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2021-11-16 22:57:04,868 INFO L933 BasicCegarLoop]: 1784 mSDtfsCounter, 1962 mSDsluCounter, 10200 mSDsCounter, 0 mSdLazyCounter, 4250 mSolverCounterSat, 1000 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 11984 SdHoareTripleChecker+Invalid, 5251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 4250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2021-11-16 22:57:04,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 11984 Invalid, 5251 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1000 Valid, 4250 Invalid, 1 Unknown, 0 Unchecked, 24.2s Time] [2021-11-16 22:57:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-11-16 22:57:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2410. [2021-11-16 22:57:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 1873 states have (on average 1.4132407901761879) internal successors, (2647), 1893 states have internal predecessors, (2647), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-16 22:57:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3701 transitions. [2021-11-16 22:57:04,976 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3701 transitions. Word has length 111 [2021-11-16 22:57:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:57:04,976 INFO L470 AbstractCegarLoop]: Abstraction has 2410 states and 3701 transitions. [2021-11-16 22:57:04,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:57:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3701 transitions. [2021-11-16 22:57:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-16 22:57:04,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:57:04,981 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:57:05,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-16 22:57:05,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:57:05,196 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:57:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:57:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash -372113542, now seen corresponding path program 1 times [2021-11-16 22:57:05,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:57:05,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416631962] [2021-11-16 22:57:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:57:05,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:57:05,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:57:05,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613674570] [2021-11-16 22:57:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:57:05,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:57:05,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:57:05,257 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) [2021-11-16 22:57:05,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-16 22:57:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-16 22:57:05,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:57:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-16 22:57:06,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:57:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-16 22:57:08,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:57:08,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416631962] [2021-11-16 22:57:08,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:57:08,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613674570] [2021-11-16 22:57:08,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613674570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:57:08,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 22:57:08,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-16 22:57:08,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779318018] [2021-11-16 22:57:08,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 22:57:08,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-16 22:57:08,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:57:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-16 22:57:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-16 22:57:08,496 INFO L87 Difference]: Start difference. First operand 2410 states and 3701 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 22:57:10,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:57:12,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:57:15,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:57:17,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:57:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:57:17,208 INFO L93 Difference]: Finished difference Result 4859 states and 7559 transitions. [2021-11-16 22:57:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-16 22:57:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 123 [2021-11-16 22:57:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:57:17,268 INFO L225 Difference]: With dead ends: 4859 [2021-11-16 22:57:17,268 INFO L226 Difference]: Without dead ends: 2458 [2021-11-16 22:57:17,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-16 22:57:17,330 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 22 mSDsluCounter, 8505 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10209 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-16 22:57:17,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 10209 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2021-11-16 22:57:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-11-16 22:57:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2458. [2021-11-16 22:57:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1921 states have (on average 1.4029151483602291) internal successors, (2695), 1941 states have internal predecessors, (2695), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-16 22:57:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3749 transitions. [2021-11-16 22:57:17,428 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3749 transitions. Word has length 123 [2021-11-16 22:57:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:57:17,429 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 3749 transitions. [2021-11-16 22:57:17,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 22:57:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3749 transitions. [2021-11-16 22:57:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-16 22:57:17,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:57:17,437 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:57:17,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-16 22:57:17,651 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,SelfDestructingSolverStorable12 [2021-11-16 22:57:17,652 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:57:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:57:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1685848428, now seen corresponding path program 2 times [2021-11-16 22:57:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:57:17,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467489695] [2021-11-16 22:57:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:57:17,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:57:17,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:57:17,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826411265] [2021-11-16 22:57:17,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 22:57:17,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:57:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:57:17,683 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) [2021-11-16 22:57:17,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-16 22:57:18,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 22:57:18,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 22:57:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 2248 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 22:57:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:57:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-16 22:57:21,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:57:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-16 22:57:23,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:57:23,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467489695] [2021-11-16 22:57:23,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:57:23,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826411265] [2021-11-16 22:57:23,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826411265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:57:23,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 22:57:23,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 34 [2021-11-16 22:57:23,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610078023] [2021-11-16 22:57:23,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 22:57:23,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-16 22:57:23,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:57:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-16 22:57:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 22:57:23,476 INFO L87 Difference]: Start difference. First operand 2458 states and 3749 transitions. Second operand has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 22:57:25,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:57:27,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:57:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:57:28,017 INFO L93 Difference]: Finished difference Result 4947 states and 7643 transitions. [2021-11-16 22:57:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-16 22:57:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 155 [2021-11-16 22:57:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:57:28,215 INFO L225 Difference]: With dead ends: 4947 [2021-11-16 22:57:28,216 INFO L226 Difference]: Without dead ends: 2498 [2021-11-16 22:57:28,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-16 22:57:28,233 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 32 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6807 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-16 22:57:28,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 6807 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-11-16 22:57:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-11-16 22:57:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2498. [2021-11-16 22:57:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1961 states have (on average 1.3946965833758287) internal successors, (2735), 1981 states have internal predecessors, (2735), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-16 22:57:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3789 transitions. [2021-11-16 22:57:28,364 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3789 transitions. Word has length 155 [2021-11-16 22:57:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:57:28,365 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 3789 transitions. [2021-11-16 22:57:28,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-16 22:57:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3789 transitions. [2021-11-16 22:57:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-16 22:57:28,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:57:28,376 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:57:28,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-16 22:57:28,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-16 22:57:28,592 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:57:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:57:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash -508063359, now seen corresponding path program 1 times [2021-11-16 22:57:28,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:57:28,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477110504] [2021-11-16 22:57:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:57:28,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:57:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:57:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-16 22:57:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-16 22:57:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-16 22:57:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-16 22:57:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-16 22:57:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 22:57:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:57:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 22:57:30,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:57:30,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477110504] [2021-11-16 22:57:30,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477110504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 22:57:30,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316084215] [2021-11-16 22:57:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:57:30,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:57:30,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:57:30,964 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) [2021-11-16 22:57:30,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-16 22:57:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:57:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-16 22:57:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:57:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 2 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-16 22:57:32,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:57:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-16 22:57:35,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316084215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:57:35,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 22:57:35,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 37 [2021-11-16 22:57:35,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636190819] [2021-11-16 22:57:35,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 22:57:35,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-16 22:57:35,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:57:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-16 22:57:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-11-16 22:57:35,579 INFO L87 Difference]: Start difference. First operand 2498 states and 3789 transitions. Second operand has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:57:39,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:57:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:57:55,049 INFO L93 Difference]: Finished difference Result 5321 states and 8313 transitions. [2021-11-16 22:57:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-16 22:57:55,049 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2021-11-16 22:57:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:57:55,067 INFO L225 Difference]: With dead ends: 5321 [2021-11-16 22:57:55,068 INFO L226 Difference]: Without dead ends: 3090 [2021-11-16 22:57:55,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-11-16 22:57:55,080 INFO L933 BasicCegarLoop]: 1912 mSDtfsCounter, 1985 mSDsluCounter, 5859 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 1178 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 7771 SdHoareTripleChecker+Invalid, 4356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1178 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2021-11-16 22:57:55,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2140 Valid, 7771 Invalid, 4356 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1178 Valid, 3177 Invalid, 1 Unknown, 0 Unchecked, 18.9s Time] [2021-11-16 22:57:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-11-16 22:57:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2618. [2021-11-16 22:57:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2061 states have (on average 1.3852498786996603) internal successors, (2855), 2081 states have internal predecessors, (2855), 471 states have call successors, (471), 78 states have call predecessors, (471), 85 states have return successors, (643), 473 states have call predecessors, (643), 468 states have call successors, (643) [2021-11-16 22:57:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3969 transitions. [2021-11-16 22:57:55,232 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3969 transitions. Word has length 161 [2021-11-16 22:57:55,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:57:55,233 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 3969 transitions. [2021-11-16 22:57:55,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:57:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3969 transitions. [2021-11-16 22:57:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-16 22:57:55,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:57:55,242 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:57:55,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-16 22:57:55,460 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,SelfDestructingSolverStorable14 [2021-11-16 22:57:55,461 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:57:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:57:55,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1277498002, now seen corresponding path program 2 times [2021-11-16 22:57:55,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:57:55,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373964067] [2021-11-16 22:57:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:57:55,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:57:55,494 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:57:55,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950024626] [2021-11-16 22:57:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 22:57:55,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:57:55,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:57:55,496 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) [2021-11-16 22:57:55,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-16 22:57:56,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 22:57:56,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 22:57:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2290 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-16 22:57:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:57:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-16 22:57:58,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 22:57:58,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:57:58,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373964067] [2021-11-16 22:57:58,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:57:58,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950024626] [2021-11-16 22:57:58,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950024626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:57:58,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:57:58,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 22:57:58,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128909403] [2021-11-16 22:57:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:57:58,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 22:57:58,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:57:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 22:57:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 22:57:58,121 INFO L87 Difference]: Start difference. First operand 2618 states and 3969 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 22:58:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:58:11,110 INFO L93 Difference]: Finished difference Result 2972 states and 4496 transitions. [2021-11-16 22:58:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 22:58:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 167 [2021-11-16 22:58:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:58:11,124 INFO L225 Difference]: With dead ends: 2972 [2021-11-16 22:58:11,124 INFO L226 Difference]: Without dead ends: 2969 [2021-11-16 22:58:11,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-16 22:58:11,126 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 3377 mSDsluCounter, 2313 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 4060 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-16 22:58:11,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 4060 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2021-11-16 22:58:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2021-11-16 22:58:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 2962. [2021-11-16 22:58:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2328 states have (on average 1.3964776632302405) internal successors, (3251), 2355 states have internal predecessors, (3251), 527 states have call successors, (527), 100 states have call predecessors, (527), 106 states have return successors, (707), 526 states have call predecessors, (707), 524 states have call successors, (707) [2021-11-16 22:58:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4485 transitions. [2021-11-16 22:58:11,238 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4485 transitions. Word has length 167 [2021-11-16 22:58:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:58:11,238 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 4485 transitions. [2021-11-16 22:58:11,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-16 22:58:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4485 transitions. [2021-11-16 22:58:11,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-16 22:58:11,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:58:11,248 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:58:11,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-16 22:58:11,475 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,SelfDestructingSolverStorable15 [2021-11-16 22:58:11,475 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:58:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:58:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1756424649, now seen corresponding path program 1 times [2021-11-16 22:58:11,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:58:11,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422502367] [2021-11-16 22:58:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:58:11,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:58:11,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:58:11,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634490222] [2021-11-16 22:58:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:58:11,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:58:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:58:11,511 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) [2021-11-16 22:58:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-16 22:58:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 22:58:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:58:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2021-11-16 22:58:14,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 22:58:14,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:58:14,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422502367] [2021-11-16 22:58:14,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:58:14,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634490222] [2021-11-16 22:58:14,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634490222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:58:14,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:58:14,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-16 22:58:14,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253203063] [2021-11-16 22:58:14,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:58:14,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 22:58:14,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:58:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 22:58:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:58:14,323 INFO L87 Difference]: Start difference. First operand 2962 states and 4485 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-16 22:58:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:58:14,457 INFO L93 Difference]: Finished difference Result 2964 states and 4486 transitions. [2021-11-16 22:58:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 22:58:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 192 [2021-11-16 22:58:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:58:14,476 INFO L225 Difference]: With dead ends: 2964 [2021-11-16 22:58:14,477 INFO L226 Difference]: Without dead ends: 2961 [2021-11-16 22:58:14,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-16 22:58:14,484 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 1595 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 22:58:14,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 1702 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 22:58:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-11-16 22:58:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2949. [2021-11-16 22:58:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2324 states have (on average 1.3967297762478486) internal successors, (3246), 2345 states have internal predecessors, (3246), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2021-11-16 22:58:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4463 transitions. [2021-11-16 22:58:14,648 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4463 transitions. Word has length 192 [2021-11-16 22:58:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:58:14,648 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4463 transitions. [2021-11-16 22:58:14,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-16 22:58:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4463 transitions. [2021-11-16 22:58:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-16 22:58:14,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:58:14,676 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:58:14,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-16 22:58:14,893 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,SelfDestructingSolverStorable16 [2021-11-16 22:58:14,894 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:58:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:58:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1625806616, now seen corresponding path program 1 times [2021-11-16 22:58:14,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:58:14,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932575779] [2021-11-16 22:58:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:58:14,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:58:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:58:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 22:58:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 22:58:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:58:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 22:58:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 22:58:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-16 22:58:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 22:58:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 22:58:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 22:58:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 22:58:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:58:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 22:58:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 22:58:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-11-16 22:58:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 22:58:15,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:58:15,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932575779] [2021-11-16 22:58:15,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932575779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:58:15,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:58:15,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 22:58:15,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180144767] [2021-11-16 22:58:15,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:58:15,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 22:58:15,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:58:15,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 22:58:15,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 22:58:15,394 INFO L87 Difference]: Start difference. First operand 2949 states and 4463 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:58:18,784 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 [] [2021-11-16 22:58:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:58:30,339 INFO L93 Difference]: Finished difference Result 6161 states and 9614 transitions. [2021-11-16 22:58:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 22:58:30,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 258 [2021-11-16 22:58:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:58:30,361 INFO L225 Difference]: With dead ends: 6161 [2021-11-16 22:58:30,361 INFO L226 Difference]: Without dead ends: 3603 [2021-11-16 22:58:30,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-16 22:58:30,372 INFO L933 BasicCegarLoop]: 1691 mSDtfsCounter, 1833 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 890 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 4699 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-16 22:58:30,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1947 Valid, 4699 Invalid, 2978 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [890 Valid, 2087 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2021-11-16 22:58:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-11-16 22:58:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2949. [2021-11-16 22:58:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2324 states have (on average 1.3941480206540446) internal successors, (3240), 2345 states have internal predecessors, (3240), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2021-11-16 22:58:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4457 transitions. [2021-11-16 22:58:30,506 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4457 transitions. Word has length 258 [2021-11-16 22:58:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:58:30,507 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4457 transitions. [2021-11-16 22:58:30,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 22:58:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4457 transitions. [2021-11-16 22:58:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-16 22:58:30,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:58:30,531 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:58:30,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-16 22:58:30,532 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:58:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:58:30,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1634015816, now seen corresponding path program 1 times [2021-11-16 22:58:30,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:58:30,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692625541] [2021-11-16 22:58:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:58:30,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:58:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:30,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:58:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:30,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 22:58:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 22:58:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:58:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 22:58:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-16 22:58:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 22:58:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 22:58:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 22:58:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 22:58:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:58:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 22:58:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 22:58:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-16 22:58:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2021-11-16 22:58:31,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:58:31,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692625541] [2021-11-16 22:58:31,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692625541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 22:58:31,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872818587] [2021-11-16 22:58:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:58:31,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:58:31,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:58:31,887 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) [2021-11-16 22:58:31,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-16 22:58:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:58:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 22:58:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:58:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2021-11-16 22:58:32,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:58:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2021-11-16 22:58:33,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872818587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:58:33,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 22:58:33,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2021-11-16 22:58:33,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156365344] [2021-11-16 22:58:33,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 22:58:33,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 22:58:33,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:58:33,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 22:58:33,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-16 22:58:33,668 INFO L87 Difference]: Start difference. First operand 2949 states and 4457 transitions. Second operand has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-16 22:58:37,945 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 [] [2021-11-16 22:59:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:59:02,158 INFO L93 Difference]: Finished difference Result 6313 states and 9915 transitions. [2021-11-16 22:59:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-16 22:59:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 255 [2021-11-16 22:59:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:59:02,176 INFO L225 Difference]: With dead ends: 6313 [2021-11-16 22:59:02,176 INFO L226 Difference]: Without dead ends: 3755 [2021-11-16 22:59:02,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-11-16 22:59:02,189 INFO L933 BasicCegarLoop]: 1718 mSDtfsCounter, 3561 mSDsluCounter, 7650 mSDsCounter, 0 mSdLazyCounter, 4230 mSolverCounterSat, 1467 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3637 SdHoareTripleChecker+Valid, 9368 SdHoareTripleChecker+Invalid, 5698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1467 IncrementalHoareTripleChecker+Valid, 4230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2021-11-16 22:59:02,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3637 Valid, 9368 Invalid, 5698 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1467 Valid, 4230 Invalid, 1 Unknown, 0 Unchecked, 25.4s Time] [2021-11-16 22:59:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2021-11-16 22:59:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3011. [2021-11-16 22:59:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 2378 states have (on average 1.3923465096719934) internal successors, (3311), 2398 states have internal predecessors, (3311), 526 states have call successors, (526), 98 states have call predecessors, (526), 106 states have return successors, (715), 534 states have call predecessors, (715), 524 states have call successors, (715) [2021-11-16 22:59:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4552 transitions. [2021-11-16 22:59:02,330 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4552 transitions. Word has length 255 [2021-11-16 22:59:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:59:02,331 INFO L470 AbstractCegarLoop]: Abstraction has 3011 states and 4552 transitions. [2021-11-16 22:59:02,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-16 22:59:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4552 transitions. [2021-11-16 22:59:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-16 22:59:02,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:59:02,357 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:59:02,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-16 22:59:02,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:59:02,571 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:59:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:59:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1692400654, now seen corresponding path program 1 times [2021-11-16 22:59:02,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:59:02,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383014757] [2021-11-16 22:59:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:02,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:59:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:02,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 22:59:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:02,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 22:59:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:02,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 22:59:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:02,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:59:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:02,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 22:59:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:02,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-16 22:59:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:02,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 22:59:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 22:59:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 22:59:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 22:59:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 22:59:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 22:59:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 22:59:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-11-16 22:59:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2055 trivial. 0 not checked. [2021-11-16 22:59:03,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:59:03,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383014757] [2021-11-16 22:59:03,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383014757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 22:59:03,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008637653] [2021-11-16 22:59:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:03,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:59:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:59:03,156 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) [2021-11-16 22:59:03,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-16 22:59:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 22:59:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:59:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2021-11-16 22:59:04,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:59:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2021-11-16 22:59:05,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008637653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:59:05,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 22:59:05,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-16 22:59:05,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873815183] [2021-11-16 22:59:05,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 22:59:05,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-16 22:59:05,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:59:05,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-16 22:59:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-16 22:59:05,803 INFO L87 Difference]: Start difference. First operand 3011 states and 4552 transitions. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-16 22:59:09,968 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 [] [2021-11-16 22:59:12,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 22:59:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:59:35,330 INFO L93 Difference]: Finished difference Result 6434 states and 10044 transitions. [2021-11-16 22:59:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-16 22:59:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 267 [2021-11-16 22:59:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:59:35,350 INFO L225 Difference]: With dead ends: 6434 [2021-11-16 22:59:35,350 INFO L226 Difference]: Without dead ends: 3814 [2021-11-16 22:59:35,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-11-16 22:59:35,364 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 1899 mSDsluCounter, 7378 mSDsCounter, 0 mSdLazyCounter, 4611 mSolverCounterSat, 966 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2029 SdHoareTripleChecker+Valid, 9225 SdHoareTripleChecker+Invalid, 5579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 4611 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2021-11-16 22:59:35,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2029 Valid, 9225 Invalid, 5579 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [966 Valid, 4611 Invalid, 2 Unknown, 0 Unchecked, 28.2s Time] [2021-11-16 22:59:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2021-11-16 22:59:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3147. [2021-11-16 22:59:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 2494 states have (on average 1.3893344025661587) internal successors, (3465), 2515 states have internal predecessors, (3465), 546 states have call successors, (546), 98 states have call predecessors, (546), 106 states have return successors, (755), 553 states have call predecessors, (755), 544 states have call successors, (755) [2021-11-16 22:59:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 4766 transitions. [2021-11-16 22:59:35,552 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 4766 transitions. Word has length 267 [2021-11-16 22:59:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:59:35,553 INFO L470 AbstractCegarLoop]: Abstraction has 3147 states and 4766 transitions. [2021-11-16 22:59:35,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-16 22:59:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 4766 transitions. [2021-11-16 22:59:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-16 22:59:35,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:59:35,573 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:59:35,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-16 22:59:35,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:59:35,788 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:59:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:59:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash -484877526, now seen corresponding path program 1 times [2021-11-16 22:59:35,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:59:35,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606008230] [2021-11-16 22:59:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:35,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:59:35,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:59:35,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549353219] [2021-11-16 22:59:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:35,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:59:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:59:35,828 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) [2021-11-16 22:59:35,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-16 22:59:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 3242 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 22:59:36,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:59:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2021-11-16 22:59:37,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 22:59:37,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:59:37,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606008230] [2021-11-16 22:59:37,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:59:37,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549353219] [2021-11-16 22:59:37,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549353219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:59:37,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:59:37,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 22:59:37,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474887910] [2021-11-16 22:59:37,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:59:37,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 22:59:37,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:59:37,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 22:59:37,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 22:59:37,645 INFO L87 Difference]: Start difference. First operand 3147 states and 4766 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-16 22:59:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:59:38,209 INFO L93 Difference]: Finished difference Result 5261 states and 8112 transitions. [2021-11-16 22:59:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 22:59:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) Word has length 355 [2021-11-16 22:59:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:59:38,228 INFO L225 Difference]: With dead ends: 5261 [2021-11-16 22:59:38,228 INFO L226 Difference]: Without dead ends: 3181 [2021-11-16 22:59:38,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-16 22:59:38,278 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 7 mSDsluCounter, 12036 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13760 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 22:59:38,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13760 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 22:59:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-11-16 22:59:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 3167. [2021-11-16 22:59:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 2507 states have (on average 1.3873155165536497) internal successors, (3478), 2528 states have internal predecessors, (3478), 550 states have call successors, (550), 98 states have call predecessors, (550), 109 states have return successors, (804), 560 states have call predecessors, (804), 548 states have call successors, (804) [2021-11-16 22:59:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 4832 transitions. [2021-11-16 22:59:38,411 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 4832 transitions. Word has length 355 [2021-11-16 22:59:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:59:38,414 INFO L470 AbstractCegarLoop]: Abstraction has 3167 states and 4832 transitions. [2021-11-16 22:59:38,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-16 22:59:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 4832 transitions. [2021-11-16 22:59:38,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-11-16 22:59:38,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:59:38,433 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:59:38,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-16 22:59:38,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:59:38,648 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:59:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:59:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1561762971, now seen corresponding path program 1 times [2021-11-16 22:59:38,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:59:38,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413743655] [2021-11-16 22:59:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:38,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:59:38,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:59:38,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897989542] [2021-11-16 22:59:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:38,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:59:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:59:38,698 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) [2021-11-16 22:59:38,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-16 22:59:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 4091 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 22:59:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:59:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-16 22:59:41,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 22:59:41,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:59:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413743655] [2021-11-16 22:59:41,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:59:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897989542] [2021-11-16 22:59:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897989542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 22:59:41,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 22:59:41,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-16 22:59:41,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640578877] [2021-11-16 22:59:41,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 22:59:41,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-16 22:59:41,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:59:41,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-16 22:59:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-16 22:59:41,326 INFO L87 Difference]: Start difference. First operand 3167 states and 4832 transitions. Second operand has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-16 22:59:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 22:59:41,881 INFO L93 Difference]: Finished difference Result 5280 states and 8154 transitions. [2021-11-16 22:59:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-16 22:59:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) Word has length 522 [2021-11-16 22:59:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 22:59:41,902 INFO L225 Difference]: With dead ends: 5280 [2021-11-16 22:59:41,902 INFO L226 Difference]: Without dead ends: 3180 [2021-11-16 22:59:41,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-16 22:59:41,916 INFO L933 BasicCegarLoop]: 1707 mSDtfsCounter, 6 mSDsluCounter, 11926 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13633 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 22:59:41,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 13633 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 22:59:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-11-16 22:59:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3169. [2021-11-16 22:59:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 2509 states have (on average 1.387006775607812) internal successors, (3480), 2529 states have internal predecessors, (3480), 550 states have call successors, (550), 98 states have call predecessors, (550), 109 states have return successors, (804), 561 states have call predecessors, (804), 548 states have call successors, (804) [2021-11-16 22:59:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 4834 transitions. [2021-11-16 22:59:42,048 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 4834 transitions. Word has length 522 [2021-11-16 22:59:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 22:59:42,049 INFO L470 AbstractCegarLoop]: Abstraction has 3169 states and 4834 transitions. [2021-11-16 22:59:42,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-16 22:59:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 4834 transitions. [2021-11-16 22:59:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-11-16 22:59:42,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 22:59:42,067 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 11, 11, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 22:59:42,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-16 22:59:42,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-16 22:59:42,296 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 22:59:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 22:59:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2141720033, now seen corresponding path program 1 times [2021-11-16 22:59:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 22:59:42,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889396123] [2021-11-16 22:59:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:42,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 22:59:42,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-16 22:59:42,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189283158] [2021-11-16 22:59:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 22:59:42,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 22:59:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 22:59:42,339 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) [2021-11-16 22:59:42,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-16 22:59:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 22:59:43,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 4628 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-16 22:59:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 22:59:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 336 proven. 76 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-11-16 22:59:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 22:59:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 145 proven. 10 refuted. 0 times theorem prover too weak. 2149 trivial. 0 not checked. [2021-11-16 22:59:50,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 22:59:50,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889396123] [2021-11-16 22:59:50,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-16 22:59:50,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189283158] [2021-11-16 22:59:50,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189283158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 22:59:50,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 22:59:50,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2021-11-16 22:59:50,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319985407] [2021-11-16 22:59:50,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 22:59:50,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 22:59:50,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 22:59:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 22:59:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-16 22:59:50,328 INFO L87 Difference]: Start difference. First operand 3169 states and 4834 transitions. Second operand has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 8 states have call successors, (63), 8 states have call predecessors, (63), 10 states have return successors, (60), 7 states have call predecessors, (60), 7 states have call successors, (60) [2021-11-16 23:00:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:00:08,895 INFO L93 Difference]: Finished difference Result 3368 states and 5117 transitions. [2021-11-16 23:00:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 23:00:08,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 8 states have call successors, (63), 8 states have call predecessors, (63), 10 states have return successors, (60), 7 states have call predecessors, (60), 7 states have call successors, (60) Word has length 596 [2021-11-16 23:00:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:00:08,914 INFO L225 Difference]: With dead ends: 3368 [2021-11-16 23:00:08,914 INFO L226 Difference]: Without dead ends: 3365 [2021-11-16 23:00:08,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 1182 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-11-16 23:00:08,918 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 5128 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 3372 mSolverCounterSat, 2090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5135 SdHoareTripleChecker+Valid, 4631 SdHoareTripleChecker+Invalid, 5462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2090 IncrementalHoareTripleChecker+Valid, 3372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:00:08,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5135 Valid, 4631 Invalid, 5462 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2090 Valid, 3372 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2021-11-16 23:00:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-11-16 23:00:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3297. [2021-11-16 23:00:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 2613 states have (on average 1.3930348258706469) internal successors, (3640), 2632 states have internal predecessors, (3640), 559 states have call successors, (559), 111 states have call predecessors, (559), 124 states have return successors, (811), 574 states have call predecessors, (811), 558 states have call successors, (811) [2021-11-16 23:00:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 5010 transitions. [2021-11-16 23:00:09,059 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 5010 transitions. Word has length 596 [2021-11-16 23:00:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:00:09,060 INFO L470 AbstractCegarLoop]: Abstraction has 3297 states and 5010 transitions. [2021-11-16 23:00:09,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 8 states have call successors, (63), 8 states have call predecessors, (63), 10 states have return successors, (60), 7 states have call predecessors, (60), 7 states have call successors, (60) [2021-11-16 23:00:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 5010 transitions. [2021-11-16 23:00:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-16 23:00:09,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:00:09,078 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:00:09,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-16 23:00:09,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:00:09,288 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:00:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:00:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash 189802671, now seen corresponding path program 1 times [2021-11-16 23:00:09,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:00:09,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672860763] [2021-11-16 23:00:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:00:09,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:00:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:09,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:00:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:09,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:00:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:09,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:00:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:00:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:00:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 23:00:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-16 23:00:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:00:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:00:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:00:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:00:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:00:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:00:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:00:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2021-11-16 23:00:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2021-11-16 23:00:10,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:00:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672860763] [2021-11-16 23:00:10,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672860763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:00:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565675147] [2021-11-16 23:00:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:00:10,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:00:10,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:00:10,400 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) [2021-11-16 23:00:10,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-16 23:00:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2093 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-16 23:00:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:00:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2021-11-16 23:00:11,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 23:00:11,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565675147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:00:11,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 23:00:11,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-11-16 23:00:11,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795491323] [2021-11-16 23:00:11,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:00:11,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-16 23:00:11,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:00:11,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-16 23:00:11,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-16 23:00:11,730 INFO L87 Difference]: Start difference. First operand 3297 states and 5010 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 23:00:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:00:11,909 INFO L93 Difference]: Finished difference Result 6263 states and 9537 transitions. [2021-11-16 23:00:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-16 23:00:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 264 [2021-11-16 23:00:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:00:11,931 INFO L225 Difference]: With dead ends: 6263 [2021-11-16 23:00:11,932 INFO L226 Difference]: Without dead ends: 3357 [2021-11-16 23:00:11,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-16 23:00:11,945 INFO L933 BasicCegarLoop]: 1696 mSDtfsCounter, 19 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3384 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 23:00:11,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3384 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 23:00:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-11-16 23:00:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3303. [2021-11-16 23:00:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 2619 states have (on average 1.3921344024436808) internal successors, (3646), 2638 states have internal predecessors, (3646), 559 states have call successors, (559), 111 states have call predecessors, (559), 124 states have return successors, (811), 574 states have call predecessors, (811), 558 states have call successors, (811) [2021-11-16 23:00:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 5016 transitions. [2021-11-16 23:00:12,161 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 5016 transitions. Word has length 264 [2021-11-16 23:00:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:00:12,162 INFO L470 AbstractCegarLoop]: Abstraction has 3303 states and 5016 transitions. [2021-11-16 23:00:12,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-16 23:00:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 5016 transitions. [2021-11-16 23:00:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-16 23:00:12,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:00:12,181 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:00:12,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-16 23:00:12,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:00:12,408 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:00:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:00:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash -956084343, now seen corresponding path program 1 times [2021-11-16 23:00:12,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:00:12,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087146295] [2021-11-16 23:00:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:00:12,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:00:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:00:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:12,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:00:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:12,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:00:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:00:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:00:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-16 23:00:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 23:00:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:00:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:00:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:00:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:00:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:00:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:00:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:00:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2021-11-16 23:00:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2021-11-16 23:00:13,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:00:13,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087146295] [2021-11-16 23:00:13,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087146295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:00:13,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201122189] [2021-11-16 23:00:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:00:13,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:00:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:00:13,503 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) [2021-11-16 23:00:13,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-16 23:00:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:13,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-16 23:00:13,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:00:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2021-11-16 23:00:14,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 23:00:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2021-11-16 23:00:15,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201122189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 23:00:15,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 23:00:15,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2021-11-16 23:00:15,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079737759] [2021-11-16 23:00:15,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 23:00:15,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 23:00:15,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:00:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 23:00:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-16 23:00:15,504 INFO L87 Difference]: Start difference. First operand 3303 states and 5016 transitions. Second operand has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-16 23:00:21,112 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 [] [2021-11-16 23:00:23,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:00:50,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:00:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:00:58,205 INFO L93 Difference]: Finished difference Result 7186 states and 11264 transitions. [2021-11-16 23:00:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-16 23:00:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 268 [2021-11-16 23:00:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:00:58,221 INFO L225 Difference]: With dead ends: 7186 [2021-11-16 23:00:58,221 INFO L226 Difference]: Without dead ends: 4274 [2021-11-16 23:00:58,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-11-16 23:00:58,228 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 3328 mSDsluCounter, 12442 mSDsCounter, 0 mSdLazyCounter, 6480 mSolverCounterSat, 1229 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 14170 SdHoareTripleChecker+Invalid, 7711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 6480 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.6s IncrementalHoareTripleChecker+Time [2021-11-16 23:00:58,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3408 Valid, 14170 Invalid, 7711 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1229 Valid, 6480 Invalid, 2 Unknown, 0 Unchecked, 39.6s Time] [2021-11-16 23:00:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-11-16 23:00:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3483. [2021-11-16 23:00:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2772 states have (on average 1.3834776334776335) internal successors, (3835), 2791 states have internal predecessors, (3835), 586 states have call successors, (586), 111 states have call predecessors, (586), 124 states have return successors, (865), 601 states have call predecessors, (865), 585 states have call successors, (865) [2021-11-16 23:00:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5286 transitions. [2021-11-16 23:00:58,391 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5286 transitions. Word has length 268 [2021-11-16 23:00:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:00:58,392 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 5286 transitions. [2021-11-16 23:00:58,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-16 23:00:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5286 transitions. [2021-11-16 23:00:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-16 23:00:58,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:00:58,409 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:00:58,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-16 23:00:58,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:00:58,627 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:00:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:00:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1370146510, now seen corresponding path program 1 times [2021-11-16 23:00:58,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:00:58,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469109770] [2021-11-16 23:00:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:00:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:00:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:00:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:00:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:00:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:00:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:00:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:00:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 23:00:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:00:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:58,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:00:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:59,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:00:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:59,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:00:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:59,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:00:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:59,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:00:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:59,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-16 23:00:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:00:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2021-11-16 23:00:59,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:00:59,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469109770] [2021-11-16 23:00:59,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469109770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:00:59,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:00:59,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-16 23:00:59,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357791185] [2021-11-16 23:00:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:00:59,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 23:00:59,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:00:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 23:00:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 23:00:59,056 INFO L87 Difference]: Start difference. First operand 3483 states and 5286 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:01:01,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:01:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:01:13,521 INFO L93 Difference]: Finished difference Result 7362 states and 11512 transitions. [2021-11-16 23:01:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 23:01:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 259 [2021-11-16 23:01:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:01:13,536 INFO L225 Difference]: With dead ends: 7362 [2021-11-16 23:01:13,536 INFO L226 Difference]: Without dead ends: 4270 [2021-11-16 23:01:13,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-16 23:01:13,544 INFO L933 BasicCegarLoop]: 1838 mSDtfsCounter, 1700 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 884 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 4789 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:01:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1812 Valid, 4789 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 2152 Invalid, 1 Unknown, 0 Unchecked, 14.0s Time] [2021-11-16 23:01:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2021-11-16 23:01:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3483. [2021-11-16 23:01:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2772 states have (on average 1.3813131313131313) internal successors, (3829), 2791 states have internal predecessors, (3829), 586 states have call successors, (586), 111 states have call predecessors, (586), 124 states have return successors, (865), 601 states have call predecessors, (865), 585 states have call successors, (865) [2021-11-16 23:01:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5280 transitions. [2021-11-16 23:01:13,674 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5280 transitions. Word has length 259 [2021-11-16 23:01:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:01:13,675 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 5280 transitions. [2021-11-16 23:01:13,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:01:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5280 transitions. [2021-11-16 23:01:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-16 23:01:13,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:01:13,692 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:01:13,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-16 23:01:13,692 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:01:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:01:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1844072294, now seen corresponding path program 1 times [2021-11-16 23:01:13,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:01:13,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286374305] [2021-11-16 23:01:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:01:13,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:01:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:01:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:01:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:13,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:01:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:01:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:01:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 23:01:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:01:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:01:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:01:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:01:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:01:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-16 23:01:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2021-11-16 23:01:14,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:01:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286374305] [2021-11-16 23:01:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286374305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:01:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131912176] [2021-11-16 23:01:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:01:14,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:01:14,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:01:14,843 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) [2021-11-16 23:01:14,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-16 23:01:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 23:01:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:01:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:16,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 23:01:16,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131912176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:01:16,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 23:01:16,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-16 23:01:16,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652581022] [2021-11-16 23:01:16,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:01:16,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-16 23:01:16,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:01:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-16 23:01:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-16 23:01:16,176 INFO L87 Difference]: Start difference. First operand 3483 states and 5280 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:01:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:01:16,471 INFO L93 Difference]: Finished difference Result 6773 states and 10316 transitions. [2021-11-16 23:01:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-16 23:01:16,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 259 [2021-11-16 23:01:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:01:16,494 INFO L225 Difference]: With dead ends: 6773 [2021-11-16 23:01:16,494 INFO L226 Difference]: Without dead ends: 3681 [2021-11-16 23:01:16,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-16 23:01:16,509 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 122 mSDsluCounter, 3396 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 5138 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 23:01:16,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 5138 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-16 23:01:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-11-16 23:01:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3533. [2021-11-16 23:01:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 2811 states have (on average 1.3820704375667023) internal successors, (3885), 2826 states have internal predecessors, (3885), 597 states have call successors, (597), 111 states have call predecessors, (597), 124 states have return successors, (887), 616 states have call predecessors, (887), 596 states have call successors, (887) [2021-11-16 23:01:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 5369 transitions. [2021-11-16 23:01:16,651 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 5369 transitions. Word has length 259 [2021-11-16 23:01:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:01:16,651 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 5369 transitions. [2021-11-16 23:01:16,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:01:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 5369 transitions. [2021-11-16 23:01:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-16 23:01:16,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:01:16,668 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:01:16,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-16 23:01:16,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-16 23:01:16,888 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:01:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:01:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1286941703, now seen corresponding path program 1 times [2021-11-16 23:01:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:01:16,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785966529] [2021-11-16 23:01:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:01:16,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:01:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:16,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:01:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:16,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:01:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:01:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:01:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:01:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-16 23:01:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:01:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:01:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:01:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:01:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:01:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2021-11-16 23:01:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2021-11-16 23:01:17,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:01:17,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785966529] [2021-11-16 23:01:17,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785966529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:01:17,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490697938] [2021-11-16 23:01:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:01:17,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:01:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:01:18,000 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 23:01:18,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-16 23:01:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-16 23:01:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:01:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:18,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-16 23:01:18,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490697938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:01:18,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 23:01:18,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 12 [2021-11-16 23:01:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102291630] [2021-11-16 23:01:18,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:01:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 23:01:18,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:01:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 23:01:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-16 23:01:18,982 INFO L87 Difference]: Start difference. First operand 3533 states and 5369 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:01:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:01:19,275 INFO L93 Difference]: Finished difference Result 6709 states and 10210 transitions. [2021-11-16 23:01:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 23:01:19,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 256 [2021-11-16 23:01:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:01:19,295 INFO L225 Difference]: With dead ends: 6709 [2021-11-16 23:01:19,296 INFO L226 Difference]: Without dead ends: 3567 [2021-11-16 23:01:19,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-16 23:01:19,310 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 127 mSDsluCounter, 4978 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:01:19,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 6692 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 23:01:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-11-16 23:01:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3533. [2021-11-16 23:01:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 2811 states have (on average 1.3810032017075773) internal successors, (3882), 2826 states have internal predecessors, (3882), 597 states have call successors, (597), 111 states have call predecessors, (597), 124 states have return successors, (887), 616 states have call predecessors, (887), 596 states have call successors, (887) [2021-11-16 23:01:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 5366 transitions. [2021-11-16 23:01:19,457 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 5366 transitions. Word has length 256 [2021-11-16 23:01:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:01:19,457 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 5366 transitions. [2021-11-16 23:01:19,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-16 23:01:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 5366 transitions. [2021-11-16 23:01:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-16 23:01:19,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:01:19,474 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:01:19,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-16 23:01:19,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-16 23:01:19,700 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:01:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:01:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -540262813, now seen corresponding path program 1 times [2021-11-16 23:01:19,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:01:19,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061178779] [2021-11-16 23:01:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:01:19,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:01:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:19,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:01:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:01:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:01:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:01:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:01:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 23:01:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:01:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:01:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:01:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:01:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:01:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-11-16 23:01:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:20,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:01:20,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061178779] [2021-11-16 23:01:20,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061178779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:01:20,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983076642] [2021-11-16 23:01:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:01:20,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:01:20,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:01:20,268 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 23:01:20,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-16 23:01:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-16 23:01:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:01:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:21,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 23:01:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983076642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 23:01:21,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 23:01:21,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2021-11-16 23:01:21,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005845905] [2021-11-16 23:01:21,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 23:01:21,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 23:01:21,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:01:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 23:01:21,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-16 23:01:21,917 INFO L87 Difference]: Start difference. First operand 3533 states and 5366 transitions. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 9 states have internal predecessors, (123), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:01:25,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:01:27,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:01:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:01:46,384 INFO L93 Difference]: Finished difference Result 4385 states and 6991 transitions. [2021-11-16 23:01:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 23:01:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 9 states have internal predecessors, (123), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 260 [2021-11-16 23:01:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:01:46,403 INFO L225 Difference]: With dead ends: 4385 [2021-11-16 23:01:46,403 INFO L226 Difference]: Without dead ends: 4379 [2021-11-16 23:01:46,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-16 23:01:46,406 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2143 mSDsluCounter, 7191 mSDsCounter, 0 mSdLazyCounter, 3995 mSolverCounterSat, 1262 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 9023 SdHoareTripleChecker+Invalid, 5259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 3995 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:01:46,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2267 Valid, 9023 Invalid, 5259 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1262 Valid, 3995 Invalid, 2 Unknown, 0 Unchecked, 24.0s Time] [2021-11-16 23:01:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-11-16 23:01:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3581. [2021-11-16 23:01:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 2851 states have (on average 1.3784636969484392) internal successors, (3930), 2866 states have internal predecessors, (3930), 605 states have call successors, (605), 111 states have call predecessors, (605), 124 states have return successors, (903), 624 states have call predecessors, (903), 604 states have call successors, (903) [2021-11-16 23:01:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5438 transitions. [2021-11-16 23:01:46,575 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5438 transitions. Word has length 260 [2021-11-16 23:01:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:01:46,575 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5438 transitions. [2021-11-16 23:01:46,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 9 states have internal predecessors, (123), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:01:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5438 transitions. [2021-11-16 23:01:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-16 23:01:46,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:01:46,589 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:01:46,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-16 23:01:46,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-16 23:01:46,791 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:01:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:01:46,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1378082505, now seen corresponding path program 2 times [2021-11-16 23:01:46,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:01:46,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707309919] [2021-11-16 23:01:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:01:46,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:01:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:01:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:01:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:01:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:01:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:01:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-16 23:01:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:01:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:01:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:01:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:01:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:01:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:01:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-11-16 23:01:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:01:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:47,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:01:47,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707309919] [2021-11-16 23:01:47,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707309919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:01:47,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120469778] [2021-11-16 23:01:47,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 23:01:47,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:01:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:01:47,573 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 23:01:47,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-16 23:01:48,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 23:01:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 23:01:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-16 23:01:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:01:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:48,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 23:01:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:01:49,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120469778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 23:01:49,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 23:01:49,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2021-11-16 23:01:49,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659418439] [2021-11-16 23:01:49,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 23:01:49,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-16 23:01:49,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:01:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-16 23:01:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-16 23:01:49,851 INFO L87 Difference]: Start difference. First operand 3581 states and 5438 transitions. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 17 states have internal predecessors, (155), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:01:53,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:02:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:02:11,283 INFO L93 Difference]: Finished difference Result 4481 states and 7139 transitions. [2021-11-16 23:02:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-16 23:02:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 17 states have internal predecessors, (155), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 276 [2021-11-16 23:02:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:02:11,297 INFO L225 Difference]: With dead ends: 4481 [2021-11-16 23:02:11,297 INFO L226 Difference]: Without dead ends: 4475 [2021-11-16 23:02:11,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-11-16 23:02:11,299 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 1953 mSDsluCounter, 7061 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 998 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 4748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2021-11-16 23:02:11,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2093 Valid, 8715 Invalid, 4748 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [998 Valid, 3749 Invalid, 1 Unknown, 0 Unchecked, 20.9s Time] [2021-11-16 23:02:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-11-16 23:02:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3677. [2021-11-16 23:02:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 2931 states have (on average 1.3735926305015353) internal successors, (4026), 2946 states have internal predecessors, (4026), 621 states have call successors, (621), 111 states have call predecessors, (621), 124 states have return successors, (935), 640 states have call predecessors, (935), 620 states have call successors, (935) [2021-11-16 23:02:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 5582 transitions. [2021-11-16 23:02:11,440 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 5582 transitions. Word has length 276 [2021-11-16 23:02:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:02:11,440 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 5582 transitions. [2021-11-16 23:02:11,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 17 states have internal predecessors, (155), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:02:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 5582 transitions. [2021-11-16 23:02:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-16 23:02:11,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:02:11,461 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 14, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:02:11,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-16 23:02:11,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:02:11,662 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:02:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:02:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash 251197785, now seen corresponding path program 1 times [2021-11-16 23:02:11,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:02:11,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015456596] [2021-11-16 23:02:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:02:11,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:02:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:12,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:02:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:12,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:02:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:12,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:02:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:02:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:02:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:02:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-16 23:02:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:02:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:02:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:02:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:02:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:02:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:02:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-11-16 23:02:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:02:13,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:02:13,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015456596] [2021-11-16 23:02:13,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015456596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:02:13,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853956147] [2021-11-16 23:02:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:02:13,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:02:13,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:02:13,291 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 23:02:13,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-16 23:02:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-16 23:02:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:02:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:02:14,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 23:02:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:02:17,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853956147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 23:02:17,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 23:02:17,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 36 [2021-11-16 23:02:17,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298057330] [2021-11-16 23:02:17,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 23:02:17,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-16 23:02:17,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:02:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-16 23:02:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2021-11-16 23:02:17,888 INFO L87 Difference]: Start difference. First operand 3677 states and 5582 transitions. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 33 states have internal predecessors, (216), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:02:22,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:02:24,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:02:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:02:49,556 INFO L93 Difference]: Finished difference Result 4673 states and 7435 transitions. [2021-11-16 23:02:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-16 23:02:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 33 states have internal predecessors, (216), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 305 [2021-11-16 23:02:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:02:49,582 INFO L225 Difference]: With dead ends: 4673 [2021-11-16 23:02:49,583 INFO L226 Difference]: Without dead ends: 4667 [2021-11-16 23:02:49,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2021-11-16 23:02:49,587 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 1573 mSDsluCounter, 7593 mSDsCounter, 0 mSdLazyCounter, 5159 mSolverCounterSat, 669 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 9427 SdHoareTripleChecker+Invalid, 5830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 5159 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2021-11-16 23:02:49,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1745 Valid, 9427 Invalid, 5830 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [669 Valid, 5159 Invalid, 2 Unknown, 0 Unchecked, 31.0s Time] [2021-11-16 23:02:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-11-16 23:02:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3869. [2021-11-16 23:02:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3091 states have (on average 1.3646069233257845) internal successors, (4218), 3106 states have internal predecessors, (4218), 653 states have call successors, (653), 111 states have call predecessors, (653), 124 states have return successors, (999), 672 states have call predecessors, (999), 652 states have call successors, (999) [2021-11-16 23:02:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 5870 transitions. [2021-11-16 23:02:49,767 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 5870 transitions. Word has length 305 [2021-11-16 23:02:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:02:49,767 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 5870 transitions. [2021-11-16 23:02:49,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 33 states have internal predecessors, (216), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:02:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 5870 transitions. [2021-11-16 23:02:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-16 23:02:49,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:02:49,793 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 30, 30, 30, 30, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:02:49,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-16 23:02:49,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:02:49,994 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:02:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:02:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash -615795274, now seen corresponding path program 1 times [2021-11-16 23:02:49,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:02:49,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844676428] [2021-11-16 23:02:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:02:49,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:02:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:02:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:02:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:02:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:02:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:02:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:02:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-16 23:02:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:02:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:53,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:02:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:54,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:02:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:54,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:02:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:54,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:02:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:54,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:02:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:54,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-16 23:02:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:02:54,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:02:54,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844676428] [2021-11-16 23:02:54,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844676428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-16 23:02:54,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635488560] [2021-11-16 23:02:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:02:54,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-16 23:02:54,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 23:02:54,139 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-16 23:02:54,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-16 23:02:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:02:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-16 23:02:54,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 23:02:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:02:56,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 23:02:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-16 23:02:58,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635488560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 23:02:58,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-16 23:02:58,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 38 [2021-11-16 23:02:58,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307939245] [2021-11-16 23:02:58,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-16 23:02:58,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-16 23:02:58,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:02:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-16 23:02:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-11-16 23:02:58,192 INFO L87 Difference]: Start difference. First operand 3869 states and 5870 transitions. Second operand has 38 states, 38 states have (on average 6.052631578947368) internal successors, (230), 35 states have internal predecessors, (230), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:03:02,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:03:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:03:24,721 INFO L93 Difference]: Finished difference Result 4697 states and 7457 transitions. [2021-11-16 23:03:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-16 23:03:24,721 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.052631578947368) internal successors, (230), 35 states have internal predecessors, (230), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 371 [2021-11-16 23:03:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:03:24,742 INFO L225 Difference]: With dead ends: 4697 [2021-11-16 23:03:24,742 INFO L226 Difference]: Without dead ends: 4691 [2021-11-16 23:03:24,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2021-11-16 23:03:24,748 INFO L933 BasicCegarLoop]: 1856 mSDtfsCounter, 1928 mSDsluCounter, 7415 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 1059 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 9271 SdHoareTripleChecker+Invalid, 5735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2021-11-16 23:03:24,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 9271 Invalid, 5735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1059 Valid, 4675 Invalid, 1 Unknown, 0 Unchecked, 25.8s Time] [2021-11-16 23:03:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-16 23:03:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3893. [2021-11-16 23:03:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3111 states have (on average 1.3635486981677918) internal successors, (4242), 3126 states have internal predecessors, (4242), 657 states have call successors, (657), 111 states have call predecessors, (657), 124 states have return successors, (1007), 676 states have call predecessors, (1007), 656 states have call successors, (1007) [2021-11-16 23:03:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5906 transitions. [2021-11-16 23:03:24,922 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5906 transitions. Word has length 371 [2021-11-16 23:03:24,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:03:24,922 INFO L470 AbstractCegarLoop]: Abstraction has 3893 states and 5906 transitions. [2021-11-16 23:03:24,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.052631578947368) internal successors, (230), 35 states have internal predecessors, (230), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-16 23:03:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5906 transitions. [2021-11-16 23:03:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-16 23:03:24,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 23:03:24,950 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 23:03:24,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-16 23:03:25,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-16 23:03:25,151 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 23:03:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 23:03:25,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1237080788, now seen corresponding path program 1 times [2021-11-16 23:03:25,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 23:03:25,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804408694] [2021-11-16 23:03:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 23:03:25,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 23:03:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:25,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-16 23:03:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:25,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-16 23:03:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:25,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-16 23:03:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:03:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:25,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-16 23:03:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 23:03:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:25,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-16 23:03:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 23:03:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-16 23:03:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-16 23:03:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 23:03:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-16 23:03:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-16 23:03:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-11-16 23:03:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 23:03:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4043 trivial. 0 not checked. [2021-11-16 23:03:26,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-16 23:03:26,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804408694] [2021-11-16 23:03:26,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804408694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-16 23:03:26,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-16 23:03:26,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-16 23:03:26,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54021673] [2021-11-16 23:03:26,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 23:03:26,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 23:03:26,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-16 23:03:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 23:03:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-16 23:03:26,686 INFO L87 Difference]: Start difference. First operand 3893 states and 5906 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 10 states have internal predecessors, (96), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 23:03:30,953 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 [] [2021-11-16 23:03:33,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:03:52,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 23:04:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 23:04:09,740 INFO L93 Difference]: Finished difference Result 5185 states and 8198 transitions. [2021-11-16 23:04:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-16 23:04:09,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 10 states have internal predecessors, (96), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 378 [2021-11-16 23:04:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 23:04:09,743 INFO L225 Difference]: With dead ends: 5185 [2021-11-16 23:04:09,743 INFO L226 Difference]: Without dead ends: 0 [2021-11-16 23:04:09,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-11-16 23:04:09,798 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 5791 mSDsluCounter, 4871 mSDsCounter, 0 mSdLazyCounter, 6625 mSolverCounterSat, 2566 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5885 SdHoareTripleChecker+Valid, 6387 SdHoareTripleChecker+Invalid, 9194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2566 IncrementalHoareTripleChecker+Valid, 6625 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2021-11-16 23:04:09,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5885 Valid, 6387 Invalid, 9194 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2566 Valid, 6625 Invalid, 3 Unknown, 0 Unchecked, 40.8s Time] [2021-11-16 23:04:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-16 23:04:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-16 23:04:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-16 23:04:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-16 23:04:09,799 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 378 [2021-11-16 23:04:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 23:04:09,800 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-16 23:04:09,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 10 states have internal predecessors, (96), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-16 23:04:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-16 23:04:09,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-16 23:04:09,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-16 23:04:09,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-16 23:04:09,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-16 23:05:26,351 WARN L227 SmtUtils]: Spent 16.58s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:05:45,989 WARN L227 SmtUtils]: Spent 16.61s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:06:07,190 WARN L227 SmtUtils]: Spent 16.62s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:06:26,774 WARN L227 SmtUtils]: Spent 16.55s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:06:33,495 WARN L227 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 81 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:06:39,777 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 81 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-16 23:07:09,631 WARN L227 SmtUtils]: Spent 17.01s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15