./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF --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 32bit --witnessprinter.graph.data.programhash 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:01:07,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:01:07,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:01:07,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:01:07,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:01:07,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:01:07,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:01:07,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:01:07,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:01:07,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:01:07,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:01:07,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:01:07,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:01:07,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:01:07,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:01:07,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:01:07,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:01:07,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:01:07,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:01:07,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:01:07,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:01:07,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:01:07,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:01:07,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:01:07,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:01:07,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:01:07,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:01:07,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:01:07,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:01:07,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:01:07,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:01:07,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:01:07,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:01:07,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:01:07,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:01:07,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:01:07,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:01:07,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:01:07,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:01:07,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:01:07,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:01:07,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:01:07,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:01:07,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:01:07,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:01:07,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:01:07,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:01:07,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:01:07,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:01:07,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:01:07,678 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:01:07,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:01:07,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:01:07,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:01:07,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:01:07,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:01:07,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:01:07,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:01:07,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:01:07,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:01:07,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:01:07,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:01:07,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:01:07,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:01:07,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:01:07,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:01:07,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:01:07,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:01:07,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:01:07,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:01:07,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:01:07,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:01:07,685 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:01:07,686 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:01:07,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:01:07,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:01:07,687 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb [2021-11-20 06:01:07,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:01:07,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:01:07,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:01:07,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:01:07,971 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:01:07,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-11-20 06:01:08,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/data/de1df8edf/b2be80b4074142459cc3b29cea8ec80d/FLAG026a981d6 [2021-11-20 06:01:08,588 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:01:08,589 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-11-20 06:01:08,615 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/data/de1df8edf/b2be80b4074142459cc3b29cea8ec80d/FLAG026a981d6 [2021-11-20 06:01:08,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/data/de1df8edf/b2be80b4074142459cc3b29cea8ec80d [2021-11-20 06:01:08,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:01:08,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:01:08,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:01:08,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:01:08,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:01:08,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:01:08" (1/1) ... [2021-11-20 06:01:08,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7502a39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:08, skipping insertion in model container [2021-11-20 06:01:08,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:01:08" (1/1) ... [2021-11-20 06:01:08,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:01:08,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:01:09,303 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-11-20 06:01:09,308 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-11-20 06:01:09,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-11-20 06:01:09,325 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-11-20 06:01:09,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-11-20 06:01:09,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:01:09,345 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:01:09,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-11-20 06:01:09,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-11-20 06:01:09,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-11-20 06:01:09,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-11-20 06:01:09,390 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-11-20 06:01:09,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:01:09,421 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:01:09,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09 WrapperNode [2021-11-20 06:01:09,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:01:09,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:01:09,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:01:09,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:01:09,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,469 INFO L137 Inliner]: procedures = 119, calls = 42, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 155 [2021-11-20 06:01:09,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:01:09,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:01:09,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:01:09,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:01:09,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:01:09,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:01:09,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:01:09,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:01:09,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (1/1) ... [2021-11-20 06:01:09,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:01:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:09,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:01:09,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:01:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:01:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:01:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:01:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:01:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:01:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:01:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:01:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:01:09,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:01:09,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:01:09,739 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:01:09,740 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:01:10,262 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:01:10,269 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:01:10,269 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-20 06:01:10,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:01:10 BoogieIcfgContainer [2021-11-20 06:01:10,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:01:10,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:01:10,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:01:10,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:01:10,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:01:08" (1/3) ... [2021-11-20 06:01:10,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36158922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:01:10, skipping insertion in model container [2021-11-20 06:01:10,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:01:09" (2/3) ... [2021-11-20 06:01:10,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36158922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:01:10, skipping insertion in model container [2021-11-20 06:01:10,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:01:10" (3/3) ... [2021-11-20 06:01:10,286 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-11-20 06:01:10,295 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:01:10,295 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-20 06:01:10,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:01:10,375 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 [2021-11-20 06:01:10,375 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-20 06:01:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 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) [2021-11-20 06:01:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:01:10,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:10,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:10,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 179510098, now seen corresponding path program 1 times [2021-11-20 06:01:10,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:10,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006360676] [2021-11-20 06:01:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:10,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:10,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:10,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006360676] [2021-11-20 06:01:10,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006360676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:10,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:10,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:01:10,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115764304] [2021-11-20 06:01:10,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:10,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:01:10,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:01:10,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:01:10,764 INFO L87 Difference]: Start difference. First operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-20 06:01:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:10,853 INFO L93 Difference]: Finished difference Result 112 states and 188 transitions. [2021-11-20 06:01:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:01:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:01:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:10,864 INFO L225 Difference]: With dead ends: 112 [2021-11-20 06:01:10,864 INFO L226 Difference]: Without dead ends: 66 [2021-11-20 06:01:10,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:01:10,870 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:10,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 84 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:01:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-20 06:01:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-11-20 06:01:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 40 states have internal predecessors, (49), 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) [2021-11-20 06:01:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-11-20 06:01:10,911 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 8 [2021-11-20 06:01:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:10,911 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-11-20 06:01:10,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-20 06:01:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-11-20 06:01:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:01:10,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:10,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:10,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:01:10,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:10,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:10,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1306111283, now seen corresponding path program 1 times [2021-11-20 06:01:10,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:10,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715527256] [2021-11-20 06:01:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:10,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:10,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715527256] [2021-11-20 06:01:10,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715527256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:10,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:10,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:01:10,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371952960] [2021-11-20 06:01:10,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:10,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:01:10,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:01:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:01:10,998 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-20 06:01:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:11,037 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-20 06:01:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:01:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 06:01:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:11,038 INFO L225 Difference]: With dead ends: 45 [2021-11-20 06:01:11,039 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 06:01:11,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:01:11,041 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:11,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:01:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 06:01:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-11-20 06:01:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 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) [2021-11-20 06:01:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-20 06:01:11,048 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 9 [2021-11-20 06:01:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:11,049 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-20 06:01:11,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-20 06:01:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-20 06:01:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:01:11,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:11,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:11,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:01:11,050 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1834780084, now seen corresponding path program 1 times [2021-11-20 06:01:11,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977230842] [2021-11-20 06:01:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:11,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:11,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:11,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977230842] [2021-11-20 06:01:11,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977230842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:11,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:11,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:01:11,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710636953] [2021-11-20 06:01:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:11,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:01:11,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:01:11,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:01:11,266 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-20 06:01:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:11,447 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-11-20 06:01:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:01:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:11,450 INFO L225 Difference]: With dead ends: 61 [2021-11-20 06:01:11,451 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 06:01:11,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:01:11,453 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:11,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 94 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 06:01:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-11-20 06:01:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 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) [2021-11-20 06:01:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-11-20 06:01:11,468 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 10 [2021-11-20 06:01:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:11,468 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-11-20 06:01:11,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-20 06:01:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-11-20 06:01:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:01:11,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:11,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:11,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:01:11,471 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 710639734, now seen corresponding path program 1 times [2021-11-20 06:01:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664513356] [2021-11-20 06:01:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:11,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:11,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:11,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664513356] [2021-11-20 06:01:11,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664513356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:11,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:11,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:01:11,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825506699] [2021-11-20 06:01:11,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:11,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:01:11,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:01:11,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:01:11,531 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-20 06:01:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:11,634 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-20 06:01:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:01:11,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:01:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:11,636 INFO L225 Difference]: With dead ends: 45 [2021-11-20 06:01:11,636 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 06:01:11,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:01:11,638 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:11,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 06:01:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-20 06:01:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-20 06:01:11,653 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 10 [2021-11-20 06:01:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:11,654 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-20 06:01:11,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-20 06:01:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-20 06:01:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:01:11,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:11,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:11,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:01:11,657 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash 625501225, now seen corresponding path program 1 times [2021-11-20 06:01:11,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:11,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477887157] [2021-11-20 06:01:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:11,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:12,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477887157] [2021-11-20 06:01:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477887157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:12,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407480682] [2021-11-20 06:01:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:12,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:12,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:12,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:12,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:01:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:01:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:12,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 179 [2021-11-20 06:01:12,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:12,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:12,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 154 [2021-11-20 06:01:12,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:12,343 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-20 06:01:12,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 137 [2021-11-20 06:01:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:12,410 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-11-20 06:01:12,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 143 [2021-11-20 06:01:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:12,491 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-11-20 06:01:12,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 173 treesize of output 175 [2021-11-20 06:01:12,506 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 06:01:12,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 161 [2021-11-20 06:01:12,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:12,904 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-20 06:01:12,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 173 treesize of output 128 [2021-11-20 06:01:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:12,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:12,940 INFO L354 Elim1Store]: treesize reduction 164, result has 14.1 percent of original size [2021-11-20 06:01:12,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 160 treesize of output 165 [2021-11-20 06:01:13,360 INFO L354 Elim1Store]: treesize reduction 141, result has 5.4 percent of original size [2021-11-20 06:01:13,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 185 treesize of output 96 [2021-11-20 06:01:13,392 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-11-20 06:01:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 49 [2021-11-20 06:01:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:13,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:13,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407480682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:13,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:13,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2021-11-20 06:01:13,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959110106] [2021-11-20 06:01:13,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:13,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:01:13,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:01:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:01:13,753 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2021-11-20 06:01:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:14,438 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2021-11-20 06:01:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:01:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:01:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:14,439 INFO L225 Difference]: With dead ends: 69 [2021-11-20 06:01:14,439 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 06:01:14,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:01:14,441 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:14,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 183 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 187 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-11-20 06:01:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 06:01:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-11-20 06:01:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.22) internal successors, (61), 51 states have internal predecessors, (61), 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) [2021-11-20 06:01:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-20 06:01:14,450 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 15 [2021-11-20 06:01:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:14,450 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-20 06:01:14,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2021-11-20 06:01:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-20 06:01:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:01:14,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:14,452 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:14,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:01:14,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:14,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1157082046, now seen corresponding path program 1 times [2021-11-20 06:01:14,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:14,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645140068] [2021-11-20 06:01:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:14,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:14,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645140068] [2021-11-20 06:01:14,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645140068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978814349] [2021-11-20 06:01:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:14,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:14,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:14,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:01:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:01:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:14,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:14,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:14,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 109 [2021-11-20 06:01:14,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:14,909 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-11-20 06:01:14,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 134 treesize of output 88 [2021-11-20 06:01:14,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:14,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:14,999 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-11-20 06:01:14,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 120 treesize of output 94 [2021-11-20 06:01:15,027 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-11-20 06:01:15,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 143 treesize of output 130 [2021-11-20 06:01:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:15,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:15,276 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-11-20 06:01:15,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 104 [2021-11-20 06:01:15,301 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-20 06:01:15,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-11-20 06:01:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:15,519 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-11-20 06:01:15,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 99 [2021-11-20 06:01:16,126 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-11-20 06:01:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-11-20 06:01:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:16,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:16,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978814349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:16,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:16,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-20 06:01:16,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548650223] [2021-11-20 06:01:16,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:16,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:01:16,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:01:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:16,311 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-11-20 06:01:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:16,505 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-11-20 06:01:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:01:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:16,507 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:01:16,507 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:01:16,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:01:16,509 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:16,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 141 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-11-20 06:01:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:01:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-11-20 06:01:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 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) [2021-11-20 06:01:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-20 06:01:16,518 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 16 [2021-11-20 06:01:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:16,519 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-20 06:01:16,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-11-20 06:01:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-20 06:01:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:01:16,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:16,520 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:16,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:16,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:01:16,735 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash -340167970, now seen corresponding path program 1 times [2021-11-20 06:01:16,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:16,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50942175] [2021-11-20 06:01:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:16,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:16,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:16,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50942175] [2021-11-20 06:01:16,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50942175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372942940] [2021-11-20 06:01:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:16,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:16,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:16,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:16,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:01:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:01:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:16,976 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-20 06:01:16,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 136 [2021-11-20 06:01:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:16,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 105 [2021-11-20 06:01:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:17,042 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-11-20 06:01:17,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-11-20 06:01:17,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:17,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:17,129 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-11-20 06:01:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 124 treesize of output 90 [2021-11-20 06:01:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:17,363 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-11-20 06:01:17,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 104 [2021-11-20 06:01:17,396 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-20 06:01:17,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-11-20 06:01:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:17,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:17,636 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-11-20 06:01:17,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 99 [2021-11-20 06:01:18,112 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-11-20 06:01:18,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-11-20 06:01:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:18,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:18,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372942940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:18,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:18,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-20 06:01:18,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604826389] [2021-11-20 06:01:18,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:18,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:01:18,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:01:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:18,254 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2021-11-20 06:01:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:18,460 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-11-20 06:01:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:01:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:18,462 INFO L225 Difference]: With dead ends: 89 [2021-11-20 06:01:18,462 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:01:18,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:01:18,463 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 34 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:18,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 267 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2021-11-20 06:01:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:01:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-11-20 06:01:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 60 states have internal predecessors, (73), 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) [2021-11-20 06:01:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-20 06:01:18,473 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2021-11-20 06:01:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:18,473 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-20 06:01:18,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2021-11-20 06:01:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-20 06:01:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:01:18,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:18,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:18,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:18,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:01:18,699 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:18,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -82002532, now seen corresponding path program 1 times [2021-11-20 06:01:18,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:18,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366665280] [2021-11-20 06:01:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:18,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:18,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:18,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366665280] [2021-11-20 06:01:18,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366665280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046056138] [2021-11-20 06:01:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:18,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:18,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:18,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:18,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:01:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:01:18,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:18,923 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-20 06:01:18,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 136 [2021-11-20 06:01:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:18,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:18,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:18,992 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-11-20 06:01:18,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 85 [2021-11-20 06:01:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:18,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:19,076 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-11-20 06:01:19,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 124 treesize of output 90 [2021-11-20 06:01:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:19,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:19,305 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-11-20 06:01:19,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 104 [2021-11-20 06:01:19,329 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-20 06:01:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-11-20 06:01:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:19,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:19,581 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-11-20 06:01:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 99 [2021-11-20 06:01:20,075 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-11-20 06:01:20,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-11-20 06:01:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:20,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:20,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046056138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:20,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:20,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-20 06:01:20,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515152524] [2021-11-20 06:01:20,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:20,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:01:20,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:20,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:01:20,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:20,234 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2021-11-20 06:01:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:20,399 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-11-20 06:01:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:20,400 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:01:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:20,401 INFO L225 Difference]: With dead ends: 89 [2021-11-20 06:01:20,401 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:01:20,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:01:20,402 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 25 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:20,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 311 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2021-11-20 06:01:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:01:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-11-20 06:01:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 60 states have internal predecessors, (73), 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) [2021-11-20 06:01:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-20 06:01:20,410 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2021-11-20 06:01:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:20,411 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-20 06:01:20,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2021-11-20 06:01:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-20 06:01:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:01:20,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:20,412 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:20,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 06:01:20,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:20,639 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash 442135079, now seen corresponding path program 2 times [2021-11-20 06:01:20,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:20,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682132062] [2021-11-20 06:01:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:20,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:20,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:20,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682132062] [2021-11-20 06:01:20,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682132062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363645025] [2021-11-20 06:01:20,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:01:20,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:20,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:20,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:01:20,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:01:20,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:01:20,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:01:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:21,090 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-20 06:01:21,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 146 treesize of output 145 [2021-11-20 06:01:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:21,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:21,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:21,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:21,144 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-20 06:01:21,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 114 [2021-11-20 06:01:21,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:21,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:21,246 INFO L354 Elim1Store]: treesize reduction 429, result has 8.9 percent of original size [2021-11-20 06:01:21,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 75 [2021-11-20 06:01:21,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:21,448 INFO L354 Elim1Store]: treesize reduction 134, result has 16.3 percent of original size [2021-11-20 06:01:21,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 63 [2021-11-20 06:01:21,469 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 06:01:21,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 58 [2021-11-20 06:01:21,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:21,576 INFO L354 Elim1Store]: treesize reduction 100, result has 14.5 percent of original size [2021-11-20 06:01:21,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 60 [2021-11-20 06:01:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:22,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:22,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363645025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:22,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:22,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-20 06:01:22,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102147245] [2021-11-20 06:01:22,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:22,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:01:22,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:22,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:01:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:22,162 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-20 06:01:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:22,167 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2021-11-20 06:01:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:22,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:01:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:22,170 INFO L225 Difference]: With dead ends: 103 [2021-11-20 06:01:22,170 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 06:01:22,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:22,173 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:22,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 62 Unchecked, 0.0s Time] [2021-11-20 06:01:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 06:01:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-20 06:01:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 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) [2021-11-20 06:01:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-11-20 06:01:22,185 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 18 [2021-11-20 06:01:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:22,185 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-11-20 06:01:22,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-20 06:01:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-11-20 06:01:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:01:22,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:22,187 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:22,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:22,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:22,403 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash -482453053, now seen corresponding path program 2 times [2021-11-20 06:01:22,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:22,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505838677] [2021-11-20 06:01:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:22,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:22,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:22,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505838677] [2021-11-20 06:01:22,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505838677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:22,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467339479] [2021-11-20 06:01:22,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:01:22,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:22,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:22,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:22,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:01:22,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:01:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:01:22,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 06:01:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:22,958 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-20 06:01:22,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 223 treesize of output 222 [2021-11-20 06:01:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:22,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 191 [2021-11-20 06:01:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,036 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-20 06:01:23,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 174 [2021-11-20 06:01:23,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,122 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-11-20 06:01:23,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 286 treesize of output 180 [2021-11-20 06:01:23,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:23,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:23,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,158 INFO L354 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2021-11-20 06:01:23,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 205 [2021-11-20 06:01:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,194 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-11-20 06:01:23,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 206 [2021-11-20 06:01:23,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:23,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,445 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-11-20 06:01:23,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 197 treesize of output 153 [2021-11-20 06:01:23,472 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-20 06:01:23,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 197 [2021-11-20 06:01:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:23,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,542 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-11-20 06:01:23,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 185 treesize of output 199 [2021-11-20 06:01:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,813 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-11-20 06:01:23,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 215 treesize of output 159 [2021-11-20 06:01:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:23,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:23,891 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-11-20 06:01:23,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 196 treesize of output 198 [2021-11-20 06:01:24,502 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-11-20 06:01:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 184 treesize of output 128 [2021-11-20 06:01:24,715 INFO L354 Elim1Store]: treesize reduction 112, result has 7.4 percent of original size [2021-11-20 06:01:24,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 67 [2021-11-20 06:01:24,773 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-20 06:01:24,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 23 [2021-11-20 06:01:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:24,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:24,906 INFO L354 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2021-11-20 06:01:24,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-11-20 06:01:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:28,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467339479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:28,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:28,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 23 [2021-11-20 06:01:28,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105957606] [2021-11-20 06:01:28,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:28,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:01:28,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:01:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=429, Unknown=1, NotChecked=0, Total=506 [2021-11-20 06:01:28,066 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:29,362 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2021-11-20 06:01:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:01:29,362 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 06:01:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:29,364 INFO L225 Difference]: With dead ends: 133 [2021-11-20 06:01:29,364 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 06:01:29,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=290, Invalid=1115, Unknown=1, NotChecked=0, Total=1406 [2021-11-20 06:01:29,366 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 235 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:29,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 329 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 367 Invalid, 0 Unknown, 132 Unchecked, 0.6s Time] [2021-11-20 06:01:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 06:01:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 87. [2021-11-20 06:01:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 86 states have internal predecessors, (106), 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) [2021-11-20 06:01:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2021-11-20 06:01:29,376 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 19 [2021-11-20 06:01:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:29,377 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2021-11-20 06:01:29,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:01:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2021-11-20 06:01:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:01:29,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:29,378 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:29,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:29,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:01:29,591 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 220535656, now seen corresponding path program 3 times [2021-11-20 06:01:29,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:29,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672525200] [2021-11-20 06:01:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:29,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:29,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672525200] [2021-11-20 06:01:29,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672525200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880043417] [2021-11-20 06:01:29,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:01:29,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:29,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:29,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:29,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:01:30,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:01:30,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:01:30,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:01:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:30,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 257 [2021-11-20 06:01:30,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:30,180 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-20 06:01:30,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 240 [2021-11-20 06:01:30,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:30,317 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-11-20 06:01:30,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 408 treesize of output 246 [2021-11-20 06:01:30,415 INFO L354 Elim1Store]: treesize reduction 144, result has 19.1 percent of original size [2021-11-20 06:01:30,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 359 treesize of output 333 [2021-11-20 06:01:30,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:30,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:30,453 INFO L354 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2021-11-20 06:01:30,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 301 treesize of output 215 [2021-11-20 06:01:30,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:30,492 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-11-20 06:01:30,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 216 [2021-11-20 06:01:30,521 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-11-20 06:01:30,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 214 [2021-11-20 06:01:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:30,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:30,808 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-11-20 06:01:30,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 226 treesize of output 178 [2021-11-20 06:01:30,838 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-11-20 06:01:30,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 213 [2021-11-20 06:01:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:30,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:30,910 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-11-20 06:01:30,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 207 treesize of output 221 [2021-11-20 06:01:30,933 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-20 06:01:30,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 207 [2021-11-20 06:01:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:31,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:31,240 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-11-20 06:01:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 242 treesize of output 182 [2021-11-20 06:01:31,267 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-11-20 06:01:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 225 [2021-11-20 06:01:31,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:31,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:31,342 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-11-20 06:01:31,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 219 treesize of output 221 [2021-11-20 06:01:32,033 INFO L354 Elim1Store]: treesize reduction 117, result has 3.3 percent of original size [2021-11-20 06:01:32,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 205 treesize of output 115 [2021-11-20 06:01:32,059 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-20 06:01:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 91 treesize of output 59 [2021-11-20 06:01:32,122 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-11-20 06:01:32,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-11-20 06:01:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:32,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:33,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880043417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:33,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:33,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-11-20 06:01:33,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9589635] [2021-11-20 06:01:33,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:33,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:01:33,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:01:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:01:33,434 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 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) [2021-11-20 06:01:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:34,595 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2021-11-20 06:01:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:01:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:01:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:34,596 INFO L225 Difference]: With dead ends: 167 [2021-11-20 06:01:34,596 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 06:01:34,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:01:34,598 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 111 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:34,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 329 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 405 Invalid, 0 Unknown, 123 Unchecked, 0.7s Time] [2021-11-20 06:01:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 06:01:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-11-20 06:01:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 95 states have internal predecessors, (116), 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) [2021-11-20 06:01:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-11-20 06:01:34,609 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 21 [2021-11-20 06:01:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:34,609 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-11-20 06:01:34,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 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) [2021-11-20 06:01:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-11-20 06:01:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:01:34,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:34,611 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:34,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:34,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:01:34,827 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash -800532698, now seen corresponding path program 2 times [2021-11-20 06:01:34,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:34,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731093605] [2021-11-20 06:01:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:34,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:35,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731093605] [2021-11-20 06:01:35,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731093605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:35,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817449032] [2021-11-20 06:01:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:01:35,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:35,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:35,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:01:35,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:01:35,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:01:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 06:01:35,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:35,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 216 [2021-11-20 06:01:35,633 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 06:01:35,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 218 treesize of output 219 [2021-11-20 06:01:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:35,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:35,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 191 [2021-11-20 06:01:35,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:35,718 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-20 06:01:35,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 178 [2021-11-20 06:01:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:35,757 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-11-20 06:01:35,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 229 treesize of output 200 [2021-11-20 06:01:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:35,806 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-11-20 06:01:35,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 161 [2021-11-20 06:01:35,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:35,850 INFO L354 Elim1Store]: treesize reduction 114, result has 21.4 percent of original size [2021-11-20 06:01:35,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 206 [2021-11-20 06:01:35,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 159 [2021-11-20 06:01:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:36,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:36,366 INFO L354 Elim1Store]: treesize reduction 333, result has 19.0 percent of original size [2021-11-20 06:01:36,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 290 treesize of output 246 [2021-11-20 06:01:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:36,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:36,502 INFO L354 Elim1Store]: treesize reduction 470, result has 18.5 percent of original size [2021-11-20 06:01:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 324 treesize of output 360 [2021-11-20 06:01:36,562 INFO L354 Elim1Store]: treesize reduction 77, result has 46.9 percent of original size [2021-11-20 06:01:36,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 358 treesize of output 399 [2021-11-20 06:01:36,600 INFO L354 Elim1Store]: treesize reduction 96, result has 30.9 percent of original size [2021-11-20 06:01:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 390 treesize of output 397 [2021-11-20 06:01:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:37,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:37,671 INFO L354 Elim1Store]: treesize reduction 314, result has 15.4 percent of original size [2021-11-20 06:01:37,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 305 treesize of output 233 [2021-11-20 06:01:37,713 INFO L354 Elim1Store]: treesize reduction 96, result has 30.9 percent of original size [2021-11-20 06:01:37,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 326 treesize of output 344 [2021-11-20 06:01:37,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:01:37,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:01:37,812 INFO L354 Elim1Store]: treesize reduction 368, result has 20.3 percent of original size [2021-11-20 06:01:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 341 treesize of output 361 [2021-11-20 06:01:41,879 INFO L354 Elim1Store]: treesize reduction 217, result has 3.6 percent of original size [2021-11-20 06:01:41,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 308 treesize of output 169 [2021-11-20 06:01:41,931 INFO L354 Elim1Store]: treesize reduction 194, result has 1.5 percent of original size [2021-11-20 06:01:41,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 151 treesize of output 109 [2021-11-20 06:01:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:42,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:01:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:45,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817449032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:01:45,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:01:45,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 13] total 28 [2021-11-20 06:01:45,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791667258] [2021-11-20 06:01:45,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:01:45,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:01:45,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:01:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=663, Unknown=2, NotChecked=0, Total=756 [2021-11-20 06:01:45,087 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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) [2021-11-20 06:01:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:51,523 INFO L93 Difference]: Finished difference Result 150 states and 184 transitions. [2021-11-20 06:01:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:01:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:01:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:51,525 INFO L225 Difference]: With dead ends: 150 [2021-11-20 06:01:51,525 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 06:01:51,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=212, Invalid=1192, Unknown=2, NotChecked=0, Total=1406 [2021-11-20 06:01:51,526 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 142 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:51,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 293 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 273 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2021-11-20 06:01:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 06:01:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-11-20 06:01:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 95 states have internal predecessors, (116), 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) [2021-11-20 06:01:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-11-20 06:01:51,536 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 21 [2021-11-20 06:01:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:51,536 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-11-20 06:01:51,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 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) [2021-11-20 06:01:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-11-20 06:01:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:01:51,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:51,537 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:51,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:51,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:01:51,763 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-20 06:01:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash -962615628, now seen corresponding path program 1 times [2021-11-20 06:01:51,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:51,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454528897] [2021-11-20 06:01:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:51,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:01:51,808 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:01:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:01:51,889 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:01:51,889 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:01:51,890 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-11-20 06:01:51,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2021-11-20 06:01:51,893 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2021-11-20 06:01:51,893 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2021-11-20 06:01:51,893 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2021-11-20 06:01:51,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:01:51,898 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 06:01:51,901 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:01:51,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:01:51 BoogieIcfgContainer [2021-11-20 06:01:51,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:01:51,949 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:01:51,949 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:01:51,949 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:01:51,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:01:10" (3/4) ... [2021-11-20 06:01:51,952 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 06:01:52,019 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:01:52,019 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:01:52,020 INFO L158 Benchmark]: Toolchain (without parser) took 43110.50ms. Allocated memory was 98.6MB in the beginning and 207.6MB in the end (delta: 109.1MB). Free memory was 63.9MB in the beginning and 110.9MB in the end (delta: -46.9MB). Peak memory consumption was 62.7MB. Max. memory is 16.1GB. [2021-11-20 06:01:52,020 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 54.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:01:52,020 INFO L158 Benchmark]: CACSL2BoogieTranslator took 504.52ms. Allocated memory is still 98.6MB. Free memory was 63.8MB in the beginning and 65.7MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:01:52,021 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.36ms. Allocated memory is still 98.6MB. Free memory was 65.7MB in the beginning and 63.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:01:52,021 INFO L158 Benchmark]: Boogie Preprocessor took 46.21ms. Allocated memory is still 98.6MB. Free memory was 63.6MB in the beginning and 61.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:01:52,021 INFO L158 Benchmark]: RCFGBuilder took 757.97ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 61.9MB in the beginning and 100.2MB in the end (delta: -38.4MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2021-11-20 06:01:52,023 INFO L158 Benchmark]: TraceAbstraction took 41670.56ms. Allocated memory was 127.9MB in the beginning and 207.6MB in the end (delta: 79.7MB). Free memory was 99.6MB in the beginning and 113.0MB in the end (delta: -13.3MB). Peak memory consumption was 65.9MB. Max. memory is 16.1GB. [2021-11-20 06:01:52,024 INFO L158 Benchmark]: Witness Printer took 70.33ms. Allocated memory is still 207.6MB. Free memory was 113.0MB in the beginning and 110.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:01:52,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 54.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 504.52ms. Allocated memory is still 98.6MB. Free memory was 63.8MB in the beginning and 65.7MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.36ms. Allocated memory is still 98.6MB. Free memory was 65.7MB in the beginning and 63.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.21ms. Allocated memory is still 98.6MB. Free memory was 63.6MB in the beginning and 61.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 757.97ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 61.9MB in the beginning and 100.2MB in the end (delta: -38.4MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. * TraceAbstraction took 41670.56ms. Allocated memory was 127.9MB in the beginning and 207.6MB in the end (delta: 79.7MB). Free memory was 99.6MB in the beginning and 113.0MB in the end (delta: -13.3MB). Peak memory consumption was 65.9MB. Max. memory is 16.1GB. * Witness Printer took 70.33ms. Allocated memory is still 207.6MB. Free memory was 113.0MB in the beginning and 110.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1061]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1004] BCK* bucket = malloc(sizeof(BCK)); [L1005] bucket->data = 0 [L1006] bucket->list = ((void*)0) [L1008] bucket->next = malloc(sizeof(BCK)) [L1009] EXPR bucket->next [L1009] BCK* bcki = bucket->next; [L1010] bcki->data = 1 [L1011] bcki->list = ((void*)0) [L1013] bcki->next = malloc(sizeof(BCK)) [L1014] EXPR bcki->next [L1014] bcki = bcki->next [L1015] bcki->data = 2 [L1016] bcki->list = ((void*)0) [L1017] bcki->next = ((void*)0) [L1019] struct TSLL* item = ((void*)0); [L1020] struct TSLL* itr = ((void*)0); VAL [bcki={-1:0}, bucket={-5:0}, item={0:0}, itr={0:0}] [L1021] COND TRUE __VERIFIER_nondet_int() [L1023] item = malloc(sizeof(SLL)) [L1024] item->next = ((void*)0) [L1025] COND TRUE __VERIFIER_nondet_int() [L1026] item->data = 0 VAL [bcki={-1:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1032] bcki = bucket VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1034] COND FALSE !(!(bcki != ((void*)0))) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1035] COND FALSE !(!(item != ((void*)0))) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1036] EXPR bcki->data [L1036] EXPR item->data VAL [bcki={-5:0}, bcki->data=0, bucket={-5:0}, item={-4:0}, item->data=0, itr={0:0}] [L1036] COND FALSE !(bcki->data != item->data) [L1038] COND FALSE !(!(bcki != ((void*)0))) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1040] EXPR bcki->list VAL [bcki={-5:0}, bcki->list={0:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1040] COND TRUE bcki->list == ((void*)0) [L1041] bcki->list = item VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1052] bcki = bucket VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1053] COND TRUE bcki != ((void*)0) [L1055] EXPR bcki->list [L1055] item = bcki->list [L1056] bcki->list = ((void*)0) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1057] COND TRUE item != ((void*)0) [L1059] itr = item [L1060] EXPR item->next [L1060] item = item->next [L1061] EXPR itr->data [L1061] EXPR bcki->data VAL [bcki={-5:0}, bcki->data=0, bucket={-5:0}, item={0:0}, itr={-4:0}, itr->data=0] [L1061] COND TRUE !(itr->data != bcki->data) [L1061] reach_error() VAL [bcki={-5:0}, bucket={-5:0}, item={0:0}, itr={-4:0}] - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 41.5s, OverallIterations: 13, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 766 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 766 mSDsluCounter, 2283 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 766 IncrementalHoareTripleChecker+Unchecked, 1859 mSDsCounter, 174 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1546 IncrementalHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 174 mSolverCounterUnsat, 424 mSDtfsCounter, 1546 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 17.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=11, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 198 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 26.8s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 424 ConstructedInterpolants, 74 QuantifiedInterpolants, 20917 SizeOfPredicates, 72 NumberOfNonLiveVariables, 958 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 53/126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 06:01:52,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b721ce0-d8c5-457a-86f1-3021e7d88076/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE