./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:20,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:20,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:20,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:20,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:20,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:20,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:20,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:20,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:20,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:20,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:20,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:20,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:20,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:20,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:20,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:20,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:20,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:20,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:20,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:20,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:20,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:20,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:20,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:20,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:20,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:20,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:20,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:20,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:20,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:20,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:20,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:20,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:20,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:20,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:20,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:20,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:20,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:20,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:20,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:20,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:20,501 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:14:20,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:20,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:20,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:20,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:20,556 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:20,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:20,557 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:20,557 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:14:20,558 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:20,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:20,569 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:14:20,570 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:14:20,570 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:20,571 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:14:20,571 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:14:20,571 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:14:20,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:20,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:20,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:14:20,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:20,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:20,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:20,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:20,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:20,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:20,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:20,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:20,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:20,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:20,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:20,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:20,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:20,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:20,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:20,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:20,578 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:14:20,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:14:20,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:20,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:20,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:20,580 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2021-11-19 14:14:20,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:20,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:20,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:20,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:20,913 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:20,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-19 14:14:21,009 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/686588717/a9504372b9ef4d4a9bd1dc7c94cb2c36/FLAG767a3e588 [2021-11-19 14:14:21,723 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:21,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-19 14:14:21,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/686588717/a9504372b9ef4d4a9bd1dc7c94cb2c36/FLAG767a3e588 [2021-11-19 14:14:21,907 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/686588717/a9504372b9ef4d4a9bd1dc7c94cb2c36 [2021-11-19 14:14:21,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:21,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:21,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:21,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:21,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:21,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:21" (1/1) ... [2021-11-19 14:14:21,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b871a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:21, skipping insertion in model container [2021-11-19 14:14:21,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:21" (1/1) ... [2021-11-19 14:14:21,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:22,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:22,539 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-19 14:14:22,694 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-19 14:14:22,703 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:22,716 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:14:22,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17f2c5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:22, skipping insertion in model container [2021-11-19 14:14:22,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:22,717 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:22,720 INFO L158 Benchmark]: Toolchain (without parser) took 806.65ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 45.5MB in the beginning and 86.7MB in the end (delta: -41.2MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2021-11-19 14:14:22,721 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 86.0MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:22,722 INFO L158 Benchmark]: CACSL2BoogieTranslator took 803.37ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 45.3MB in the beginning and 86.7MB in the end (delta: -41.4MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2021-11-19 14:14:22,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 86.0MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 803.37ms. Allocated memory was 86.0MB in the beginning and 121.6MB in the end (delta: 35.7MB). Free memory was 45.3MB in the beginning and 86.7MB in the end (delta: -41.4MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:25,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:25,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:25,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:25,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:25,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:25,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:25,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:25,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:25,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:25,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:25,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:25,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:25,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:25,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:25,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:25,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:25,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:25,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:25,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:25,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:25,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:25,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:25,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:25,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:25,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:25,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:25,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:25,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:25,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:25,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:25,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:25,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:25,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:25,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:25,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:25,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:25,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:25,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:25,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:25,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:25,597 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:25,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:25,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:25,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:25,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:25,659 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:25,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:25,660 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:25,660 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:25,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:25,661 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:25,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:25,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:25,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:25,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:25,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:25,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:25,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:25,666 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:25,666 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:25,667 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:25,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:25,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:25,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:25,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:25,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:25,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:25,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:25,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:25,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:25,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:25,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:25,670 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:25,671 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:25,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:25,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:25,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:25,672 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2021-11-19 14:14:26,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:26,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:26,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:26,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:26,107 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:26,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-19 14:14:26,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/b728911d8/169ffc28c91640319c684f46a3316f6b/FLAGc0f472936 [2021-11-19 14:14:27,051 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:27,052 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-19 14:14:27,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/b728911d8/169ffc28c91640319c684f46a3316f6b/FLAGc0f472936 [2021-11-19 14:14:27,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/data/b728911d8/169ffc28c91640319c684f46a3316f6b [2021-11-19 14:14:27,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:27,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:27,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:27,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:27,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:27,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:27" (1/1) ... [2021-11-19 14:14:27,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b06d2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:27, skipping insertion in model container [2021-11-19 14:14:27,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:27" (1/1) ... [2021-11-19 14:14:27,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:27,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:27,882 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-19 14:14:28,076 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-19 14:14:28,101 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:28,128 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:28,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:28,247 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-19 14:14:28,399 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-19 14:14:28,404 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:28,411 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:28,461 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2021-11-19 14:14:28,527 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_cb06dad7-980b-41f8-8d2f-0bc99d85675e/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2021-11-19 14:14:28,530 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:28,608 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:28,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28 WrapperNode [2021-11-19 14:14:28,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:28,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:28,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:28,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:28,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,776 INFO L137 Inliner]: procedures = 180, calls = 285, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1026 [2021-11-19 14:14:28,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:28,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:28,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:28,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:28,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:28,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:28,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:28,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:28,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (1/1) ... [2021-11-19 14:14:28,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:28,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:29,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:14:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:14:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:14:29,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:14:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:14:29,056 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:14:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:14:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:14:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:14:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:14:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:14:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:14:29,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:14:29,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:29,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:29,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:29,394 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:29,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:38,143 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:38,153 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:38,153 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-19 14:14:38,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:38 BoogieIcfgContainer [2021-11-19 14:14:38,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:38,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:38,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:38,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:38,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:27" (1/3) ... [2021-11-19 14:14:38,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4d3810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:38, skipping insertion in model container [2021-11-19 14:14:38,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:28" (2/3) ... [2021-11-19 14:14:38,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4d3810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:38, skipping insertion in model container [2021-11-19 14:14:38,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:38" (3/3) ... [2021-11-19 14:14:38,166 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test3-1.i [2021-11-19 14:14:38,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:38,172 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:14:38,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:38,272 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=FINITE_AUTOMATA, 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 [2021-11-19 14:14:38,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:14:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 202 states, 189 states have (on average 1.693121693121693) internal successors, (320), 196 states have internal predecessors, (320), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:14:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 14:14:38,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:38,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:38,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash -858857507, now seen corresponding path program 1 times [2021-11-19 14:14:38,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:38,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822177122] [2021-11-19 14:14:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:38,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:38,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:38,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:14:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:38,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:38,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:38,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822177122] [2021-11-19 14:14:38,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822177122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:38,714 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:38,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:14:38,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606448600] [2021-11-19 14:14:38,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:38,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:14:38,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:14:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:38,773 INFO L87 Difference]: Start difference. First operand has 202 states, 189 states have (on average 1.693121693121693) internal successors, (320), 196 states have internal predecessors, (320), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-11-19 14:14:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:38,875 INFO L93 Difference]: Finished difference Result 402 states and 675 transitions. [2021-11-19 14:14:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:14:38,879 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2021-11-19 14:14:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:38,901 INFO L225 Difference]: With dead ends: 402 [2021-11-19 14:14:38,901 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 14:14:38,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:38,912 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:38,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 14:14:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-19 14:14:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.3279569892473118) internal successors, (247), 192 states have internal predecessors, (247), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:14:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2021-11-19 14:14:39,003 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 9 [2021-11-19 14:14:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:39,004 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2021-11-19 14:14:39,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-11-19 14:14:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2021-11-19 14:14:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 14:14:39,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:39,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:39,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:39,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:39,223 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1463774514, now seen corresponding path program 1 times [2021-11-19 14:14:39,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:39,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689296548] [2021-11-19 14:14:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:39,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:39,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:39,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:39,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:14:39,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:39,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:39,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689296548] [2021-11-19 14:14:39,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689296548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:39,683 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:39,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:14:39,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786018391] [2021-11-19 14:14:39,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:39,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:39,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:39,688 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:42,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:14:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:44,930 INFO L93 Difference]: Finished difference Result 502 states and 668 transitions. [2021-11-19 14:14:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-19 14:14:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:44,937 INFO L225 Difference]: With dead ends: 502 [2021-11-19 14:14:44,937 INFO L226 Difference]: Without dead ends: 304 [2021-11-19 14:14:44,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:44,941 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 140 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:44,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 703 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 14:14:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-19 14:14:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2021-11-19 14:14:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 289 states have (on average 1.328719723183391) internal successors, (384), 295 states have internal predecessors, (384), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:14:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 400 transitions. [2021-11-19 14:14:44,969 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 400 transitions. Word has length 14 [2021-11-19 14:14:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:44,969 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 400 transitions. [2021-11-19 14:14:44,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 400 transitions. [2021-11-19 14:14:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 14:14:44,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:44,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:44,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:45,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,178 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash -294024543, now seen corresponding path program 1 times [2021-11-19 14:14:45,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:45,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570124597] [2021-11-19 14:14:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:45,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:45,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:45,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:45,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:45,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:45,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570124597] [2021-11-19 14:14:45,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570124597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:45,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:45,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 14:14:45,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255244497] [2021-11-19 14:14:45,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:45,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:45,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:45,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:45,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:45,841 INFO L87 Difference]: Start difference. First operand 301 states and 400 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-11-19 14:14:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:46,076 INFO L93 Difference]: Finished difference Result 499 states and 673 transitions. [2021-11-19 14:14:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:46,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) Word has length 44 [2021-11-19 14:14:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:46,084 INFO L225 Difference]: With dead ends: 499 [2021-11-19 14:14:46,085 INFO L226 Difference]: Without dead ends: 334 [2021-11-19 14:14:46,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:46,092 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 200 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:46,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 858 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-19 14:14:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 307. [2021-11-19 14:14:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 295 states have (on average 1.2677966101694915) internal successors, (374), 301 states have internal predecessors, (374), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:14:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 390 transitions. [2021-11-19 14:14:46,149 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 390 transitions. Word has length 44 [2021-11-19 14:14:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:46,150 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 390 transitions. [2021-11-19 14:14:46,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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) [2021-11-19 14:14:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 390 transitions. [2021-11-19 14:14:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 14:14:46,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:46,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:46,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:46,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:46,366 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1193467565, now seen corresponding path program 1 times [2021-11-19 14:14:46,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:46,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005738107] [2021-11-19 14:14:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:46,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:46,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:46,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:46,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:14:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:46,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:47,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:47,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005738107] [2021-11-19 14:14:47,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005738107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:47,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:47,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-19 14:14:47,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674132777] [2021-11-19 14:14:47,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:47,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:47,220 INFO L87 Difference]: Start difference. First operand 307 states and 390 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:47,402 INFO L93 Difference]: Finished difference Result 491 states and 627 transitions. [2021-11-19 14:14:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:47,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 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 44 [2021-11-19 14:14:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:47,407 INFO L225 Difference]: With dead ends: 491 [2021-11-19 14:14:47,407 INFO L226 Difference]: Without dead ends: 320 [2021-11-19 14:14:47,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:47,409 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 100 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:47,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 1008 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-19 14:14:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 295. [2021-11-19 14:14:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 283 states have (on average 1.2508833922261484) internal successors, (354), 289 states have internal predecessors, (354), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:14:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2021-11-19 14:14:47,429 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 44 [2021-11-19 14:14:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:47,430 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2021-11-19 14:14:47,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2021-11-19 14:14:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 14:14:47,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:47,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:47,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:47,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:47,638 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash -440515753, now seen corresponding path program 1 times [2021-11-19 14:14:47,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:47,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482280116] [2021-11-19 14:14:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:47,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:47,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:47,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:47,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:47,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:47,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:47,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:14:47,999 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:14:48,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 14:14:48,087 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 14:14:48,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 23 [2021-11-19 14:14:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:48,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:48,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:48,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482280116] [2021-11-19 14:14:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482280116] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:48,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:48,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:48,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258043574] [2021-11-19 14:14:48,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:48,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:48,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:48,381 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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) [2021-11-19 14:14:52,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:14:57,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:14:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:58,016 INFO L93 Difference]: Finished difference Result 606 states and 748 transitions. [2021-11-19 14:14:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:58,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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) Word has length 44 [2021-11-19 14:14:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:58,022 INFO L225 Difference]: With dead ends: 606 [2021-11-19 14:14:58,023 INFO L226 Difference]: Without dead ends: 446 [2021-11-19 14:14:58,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:58,024 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 199 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:58,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 815 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-19 14:14:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-19 14:14:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 294. [2021-11-19 14:14:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 282 states have (on average 1.24822695035461) internal successors, (352), 288 states have internal predecessors, (352), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:14:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 368 transitions. [2021-11-19 14:14:58,050 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 368 transitions. Word has length 44 [2021-11-19 14:14:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:58,051 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 368 transitions. [2021-11-19 14:14:58,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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) [2021-11-19 14:14:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 368 transitions. [2021-11-19 14:14:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 14:14:58,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:58,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:58,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:58,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,272 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1442984128, now seen corresponding path program 1 times [2021-11-19 14:14:58,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:58,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715440029] [2021-11-19 14:14:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:58,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:58,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:58,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:58,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:14:58,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:14:59,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:59,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715440029] [2021-11-19 14:14:59,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715440029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:59,028 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:59,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:14:59,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016671308] [2021-11-19 14:14:59,028 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:59,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:59,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:59,030 INFO L87 Difference]: Start difference. First operand 294 states and 368 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:14:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:59,215 INFO L93 Difference]: Finished difference Result 587 states and 741 transitions. [2021-11-19 14:14:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 81 [2021-11-19 14:14:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:59,218 INFO L225 Difference]: With dead ends: 587 [2021-11-19 14:14:59,218 INFO L226 Difference]: Without dead ends: 302 [2021-11-19 14:14:59,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:59,220 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 409 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:59,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 465 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-19 14:14:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-11-19 14:14:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 288 states have (on average 1.1875) internal successors, (342), 294 states have internal predecessors, (342), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:14:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 358 transitions. [2021-11-19 14:14:59,236 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 358 transitions. Word has length 81 [2021-11-19 14:14:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:59,237 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 358 transitions. [2021-11-19 14:14:59,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:14:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 358 transitions. [2021-11-19 14:14:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 14:14:59,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:59,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:59,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:59,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:59,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1268606516, now seen corresponding path program 1 times [2021-11-19 14:14:59,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:59,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639096626] [2021-11-19 14:14:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:59,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:59,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:59,467 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:59,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:59,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:59,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:00,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:15:00,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:00,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639096626] [2021-11-19 14:15:00,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639096626] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:00,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:00,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:15:00,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900976566] [2021-11-19 14:15:00,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:00,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:00,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:00,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:00,231 INFO L87 Difference]: Start difference. First operand 300 states and 358 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:15:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:00,308 INFO L93 Difference]: Finished difference Result 558 states and 673 transitions. [2021-11-19 14:15:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2021-11-19 14:15:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:00,311 INFO L225 Difference]: With dead ends: 558 [2021-11-19 14:15:00,312 INFO L226 Difference]: Without dead ends: 303 [2021-11-19 14:15:00,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:00,313 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 2 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:00,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 698 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:15:00,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-19 14:15:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-11-19 14:15:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 290 states have (on average 1.1896551724137931) internal successors, (345), 297 states have internal predecessors, (345), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:15:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 362 transitions. [2021-11-19 14:15:00,330 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 362 transitions. Word has length 81 [2021-11-19 14:15:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:00,331 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 362 transitions. [2021-11-19 14:15:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:15:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 362 transitions. [2021-11-19 14:15:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:15:00,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:00,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:00,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:00,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:00,557 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1730106322, now seen corresponding path program 1 times [2021-11-19 14:15:00,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:00,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601251401] [2021-11-19 14:15:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:00,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:00,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:00,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:00,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:15:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:15:01,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:01,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:01,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601251401] [2021-11-19 14:15:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601251401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:01,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [770071122] [2021-11-19 14:15:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:01,410 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:01,415 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:01,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:15:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:01,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:15:02,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:02,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [770071122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:02,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359749665] [2021-11-19 14:15:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:02,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:02,341 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:02,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 14:15:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:15:02,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:15:02,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:15:02,836 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:15:02,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 14:15:02,930 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 14:15:02,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 23 [2021-11-19 14:15:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:15:02,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:15:03,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359749665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:03,208 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:15:03,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-19 14:15:03,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475010095] [2021-11-19 14:15:03,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:03,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:03,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:03,210 INFO L87 Difference]: Start difference. First operand 303 states and 362 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:15:07,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:15:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:10,735 INFO L93 Difference]: Finished difference Result 461 states and 552 transitions. [2021-11-19 14:15:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2021-11-19 14:15:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:10,742 INFO L225 Difference]: With dead ends: 461 [2021-11-19 14:15:10,742 INFO L226 Difference]: Without dead ends: 440 [2021-11-19 14:15:10,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:15:10,744 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 287 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:10,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 668 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 14:15:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-19 14:15:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 305. [2021-11-19 14:15:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 292 states have (on average 1.1883561643835616) internal successors, (347), 299 states have internal predecessors, (347), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:15:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 364 transitions. [2021-11-19 14:15:10,770 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 364 transitions. Word has length 83 [2021-11-19 14:15:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:10,770 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 364 transitions. [2021-11-19 14:15:10,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:15:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 364 transitions. [2021-11-19 14:15:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:15:10,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:10,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:10,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:10,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:11,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:11,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:11,390 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2117625179, now seen corresponding path program 1 times [2021-11-19 14:15:11,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:11,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560839274] [2021-11-19 14:15:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:11,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:11,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:11,392 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:11,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:15:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:11,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:11,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:15:11,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:12,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:12,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560839274] [2021-11-19 14:15:12,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560839274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:12,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [699110274] [2021-11-19 14:15:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:12,333 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:12,338 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:12,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:15:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:15:13,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:15:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [699110274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:13,483 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:15:13,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-19 14:15:13,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841941902] [2021-11-19 14:15:13,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:13,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:13,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:13,485 INFO L87 Difference]: Start difference. First operand 305 states and 364 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:15:16,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:15:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:18,336 INFO L93 Difference]: Finished difference Result 672 states and 822 transitions. [2021-11-19 14:15:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:15:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 113 [2021-11-19 14:15:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:18,341 INFO L225 Difference]: With dead ends: 672 [2021-11-19 14:15:18,341 INFO L226 Difference]: Without dead ends: 412 [2021-11-19 14:15:18,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:18,343 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 415 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:18,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 449 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-19 14:15:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-19 14:15:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 380. [2021-11-19 14:15:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 367 states have (on average 1.1907356948228882) internal successors, (437), 374 states have internal predecessors, (437), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:15:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 454 transitions. [2021-11-19 14:15:18,368 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 454 transitions. Word has length 113 [2021-11-19 14:15:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:18,369 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 454 transitions. [2021-11-19 14:15:18,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:15:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 454 transitions. [2021-11-19 14:15:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:15:18,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:18,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:18,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:18,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 14:15:18,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:18,775 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1353137643, now seen corresponding path program 1 times [2021-11-19 14:15:18,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:18,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943927934] [2021-11-19 14:15:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:18,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:18,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:18,778 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:18,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:15:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:19,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:15:19,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:19,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:19,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943927934] [2021-11-19 14:15:19,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943927934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:19,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1763073000] [2021-11-19 14:15:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:19,756 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:19,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:19,757 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:19,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:15:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:15:20,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:20,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1763073000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:20,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540123700] [2021-11-19 14:15:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:20,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:20,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:20,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 14:15:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:21,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:21,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:21,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:15:21,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540123700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:21,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:21,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-19 14:15:21,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110121596] [2021-11-19 14:15:21,576 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:15:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:15:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:21,578 INFO L87 Difference]: Start difference. First operand 380 states and 454 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:15:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:21,989 INFO L93 Difference]: Finished difference Result 727 states and 881 transitions. [2021-11-19 14:15:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:15:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-19 14:15:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:21,993 INFO L225 Difference]: With dead ends: 727 [2021-11-19 14:15:21,993 INFO L226 Difference]: Without dead ends: 395 [2021-11-19 14:15:21,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:15:21,996 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 47 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:21,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1154 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:15:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-19 14:15:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2021-11-19 14:15:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 377 states have (on average 1.206896551724138) internal successors, (455), 384 states have internal predecessors, (455), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:15:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 472 transitions. [2021-11-19 14:15:22,020 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 472 transitions. Word has length 120 [2021-11-19 14:15:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:22,021 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 472 transitions. [2021-11-19 14:15:22,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:15:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 472 transitions. [2021-11-19 14:15:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:15:22,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:22,024 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:22,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:22,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:22,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 14:15:22,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:22,638 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash -848043149, now seen corresponding path program 2 times [2021-11-19 14:15:22,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:22,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624040536] [2021-11-19 14:15:22,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:15:22,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:22,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:22,640 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:22,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:15:23,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:15:23,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:23,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:15:23,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:15:23,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:23,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624040536] [2021-11-19 14:15:23,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624040536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:23,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1191373018] [2021-11-19 14:15:23,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:15:23,797 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:23,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:23,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:23,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 14:15:24,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:15:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:24,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:15:24,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:15:24,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1191373018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:24,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621660944] [2021-11-19 14:15:24,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:15:24,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:24,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:24,998 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:24,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 14:15:25,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:15:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:25,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:25,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:15:25,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:15:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621660944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:26,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:26,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-19 14:15:26,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560977463] [2021-11-19 14:15:26,273 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:26,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:15:26,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:15:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:15:26,275 INFO L87 Difference]: Start difference. First operand 391 states and 472 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:15:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:27,525 INFO L93 Difference]: Finished difference Result 745 states and 906 transitions. [2021-11-19 14:15:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 14:15:27,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-19 14:15:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:27,537 INFO L225 Difference]: With dead ends: 745 [2021-11-19 14:15:27,537 INFO L226 Difference]: Without dead ends: 404 [2021-11-19 14:15:27,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 14:15:27,540 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 71 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:27,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1646 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:15:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-19 14:15:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 398. [2021-11-19 14:15:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 384 states have (on average 1.203125) internal successors, (462), 391 states have internal predecessors, (462), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 14:15:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 479 transitions. [2021-11-19 14:15:27,566 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 479 transitions. Word has length 126 [2021-11-19 14:15:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:27,567 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 479 transitions. [2021-11-19 14:15:27,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:15:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 479 transitions. [2021-11-19 14:15:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:15:27,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:27,570 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:27,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:27,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:28,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:28,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:28,193 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash 124871777, now seen corresponding path program 3 times [2021-11-19 14:15:28,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:28,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411063469] [2021-11-19 14:15:28,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:15:28,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:28,196 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:28,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:15:31,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:15:31,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:31,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:15:31,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:15:32,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:32,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411063469] [2021-11-19 14:15:32,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411063469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:32,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1934268990] [2021-11-19 14:15:32,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:15:32,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:32,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:32,437 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:32,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:16:47,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:16:47,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:16:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:16:47,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:16:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:16:47,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1934268990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:47,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219705993] [2021-11-19 14:16:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:16:47,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:47,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:47,947 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:47,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb06dad7-980b-41f8-8d2f-0bc99d85675e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process