./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur --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 64bit --witnessprinter.graph.data.programhash 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:01:57,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:01:57,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:01:57,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:01:57,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:01:57,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:01:57,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:01:57,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:01:57,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:01:57,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:01:57,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:01:57,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:01:57,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:01:57,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:01:57,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:01:57,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:01:57,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:01:57,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:01:57,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:01:57,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:01:57,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:01:57,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:01:57,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:01:57,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:01:57,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:01:57,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:01:57,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:01:57,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:01:57,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:01:57,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:01:57,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:01:57,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:01:57,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:01:57,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:01:57,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:01:57,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:01:57,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:01:57,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:01:57,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:01:57,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:01:57,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:01:57,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 01:01:57,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:01:57,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:01:57,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:01:57,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:01:57,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:01:57,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:01:57,773 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:01:57,773 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:01:57,773 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:01:57,774 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:01:57,774 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:01:57,774 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:01:57,775 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:01:57,775 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:01:57,775 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:01:57,775 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:01:57,776 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:01:57,776 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:01:57,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:01:57,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:01:57,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:01:57,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:01:57,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:01:57,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:01:57,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:01:57,779 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:01:57,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:01:57,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:01:57,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:01:57,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:57,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:01:57,780 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:01:57,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:01:57,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:01:57,781 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:01:57,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:01:57,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:01:57,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:01:57,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2022-11-26 01:01:58,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:01:58,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:01:58,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:01:58,099 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:01:58,099 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:01:58,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-26 01:02:01,463 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:02:02,149 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:02:02,150 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-26 01:02:02,198 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/data/40c29dabf/a5cd291a527b45129454acecc10cc7f4/FLAGa07d48789 [2022-11-26 01:02:02,217 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/data/40c29dabf/a5cd291a527b45129454acecc10cc7f4 [2022-11-26 01:02:02,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:02:02,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:02:02,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:02:02,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:02:02,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:02:02,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:02:02" (1/1) ... [2022-11-26 01:02:02,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6de412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:02, skipping insertion in model container [2022-11-26 01:02:02,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:02:02" (1/1) ... [2022-11-26 01:02:02,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:02:02,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:02:03,170 WARN L623 FunctionHandler]: Unknown extern function __list_add [2022-11-26 01:02:03,396 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irqrestore [2022-11-26 01:02:03,547 WARN L623 FunctionHandler]: Unknown extern function debug_dma_alloc_coherent [2022-11-26 01:02:03,554 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_null [2022-11-26 01:02:03,558 WARN L623 FunctionHandler]: Unknown extern function debug_dma_free_coherent [2022-11-26 01:02:03,597 WARN L623 FunctionHandler]: Unknown extern function __tasklet_schedule [2022-11-26 01:02:03,614 WARN L623 FunctionHandler]: Unknown extern function dev_get_drvdata [2022-11-26 01:02:03,623 WARN L623 FunctionHandler]: Unknown extern function dev_set_drvdata [2022-11-26 01:02:03,730 WARN L623 FunctionHandler]: Unknown extern function input_event [2022-11-26 01:02:03,735 WARN L623 FunctionHandler]: Unknown extern function input_event [2022-11-26 01:02:03,809 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,812 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,816 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,825 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:03,827 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,851 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,854 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:03,855 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,868 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,869 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,872 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,873 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:03,874 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,876 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:03,877 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:03,879 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,879 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:03,881 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,881 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,889 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,893 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:03,902 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,948 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,959 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts_init [2022-11-26 01:02:03,960 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts_init [2022-11-26 01:02:03,967 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,969 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:03,984 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts [2022-11-26 01:02:04,010 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts [2022-11-26 01:02:04,013 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts [2022-11-26 01:02:04,018 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,029 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,038 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,040 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,045 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,064 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,083 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,091 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,093 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:04,094 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,101 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,103 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,109 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:04,115 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,129 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,130 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:04,135 WARN L623 FunctionHandler]: Unknown extern function usb_set_interface [2022-11-26 01:02:04,136 WARN L623 FunctionHandler]: Unknown extern function usb_set_interface [2022-11-26 01:02:04,137 WARN L623 FunctionHandler]: Unknown extern function usb_set_interface [2022-11-26 01:02:04,142 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,143 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:04,144 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,145 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:04,150 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,151 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,152 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,152 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,153 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,154 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,154 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,156 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,157 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,157 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,158 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,159 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,167 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,171 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,177 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,179 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,180 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,191 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,191 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:04,193 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,198 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,206 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,207 WARN L623 FunctionHandler]: Unknown extern function usb_free_urb [2022-11-26 01:02:04,213 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,219 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,221 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_urb [2022-11-26 01:02:04,226 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 01:02:04,226 WARN L623 FunctionHandler]: Unknown extern function tasklet_init [2022-11-26 01:02:04,232 WARN L623 FunctionHandler]: Unknown extern function strlcat [2022-11-26 01:02:04,234 WARN L623 FunctionHandler]: Unknown extern function input_register_device [2022-11-26 01:02:04,234 WARN L623 FunctionHandler]: Unknown extern function input_free_device [2022-11-26 01:02:04,235 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:04,237 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,241 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,247 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,248 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-11-26 01:02:04,249 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-11-26 01:02:04,250 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_urb [2022-11-26 01:02:04,251 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_coherent [2022-11-26 01:02:04,252 WARN L623 FunctionHandler]: Unknown extern function usb_free_urb [2022-11-26 01:02:04,265 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,267 WARN L623 FunctionHandler]: Unknown extern function request_firmware [2022-11-26 01:02:04,268 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,271 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,275 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:04,275 WARN L623 FunctionHandler]: Unknown extern function crc32_le [2022-11-26 01:02:04,277 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,278 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:04,280 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,284 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:04,284 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:04,287 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:04,288 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:04,290 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:04,290 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,295 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,296 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,297 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,299 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,304 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,307 WARN L623 FunctionHandler]: Unknown extern function dvb_register_adapter [2022-11-26 01:02:04,308 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,310 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_init [2022-11-26 01:02:04,310 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,312 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:04,312 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_init [2022-11-26 01:02:04,313 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,313 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:04,314 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:04,315 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,315 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_release [2022-11-26 01:02:04,316 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:04,326 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:04,328 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,329 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_release [2022-11-26 01:02:04,329 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:04,329 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:04,330 WARN L623 FunctionHandler]: Unknown extern function dvb_net_init [2022-11-26 01:02:04,334 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,335 WARN L623 FunctionHandler]: Unknown extern function dvb_net_release [2022-11-26 01:02:04,336 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_release [2022-11-26 01:02:04,336 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:04,337 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_frontend [2022-11-26 01:02:04,338 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:04,343 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,344 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:04,344 WARN L623 FunctionHandler]: Unknown extern function usb_free_urb [2022-11-26 01:02:04,345 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-11-26 01:02:04,347 WARN L623 FunctionHandler]: Unknown extern function input_unregister_device [2022-11-26 01:02:04,353 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,357 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:04,362 WARN L623 FunctionHandler]: Unknown extern function tasklet_kill [2022-11-26 01:02:04,370 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:04,370 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,375 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 01:02:04,380 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:04,380 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,391 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,396 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,398 WARN L623 FunctionHandler]: Unknown extern function ttusbdecfe_dvbs_attach [2022-11-26 01:02:04,398 WARN L623 FunctionHandler]: Unknown extern function ttusbdecfe_dvbt_attach [2022-11-26 01:02:04,399 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,400 WARN L623 FunctionHandler]: Unknown extern function dvb_register_frontend [2022-11-26 01:02:04,400 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,406 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,407 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,434 WARN L623 FunctionHandler]: Unknown extern function ldv_check_return_value [2022-11-26 01:02:04,434 WARN L623 FunctionHandler]: Unknown extern function ldv_check_return_value_probe [2022-11-26 01:02:04,435 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-26 01:02:04,436 WARN L623 FunctionHandler]: Unknown extern function mutex_lock [2022-11-26 01:02:04,436 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,438 WARN L623 FunctionHandler]: Unknown extern function mutex_lock [2022-11-26 01:02:04,438 WARN L623 FunctionHandler]: Unknown extern function mutex_trylock [2022-11-26 01:02:04,439 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,439 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_interruptible [2022-11-26 01:02:04,440 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,441 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,443 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,444 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_interruptible [2022-11-26 01:02:04,445 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,446 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_interruptible [2022-11-26 01:02:04,447 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,447 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:04,452 WARN L237 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_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2022-11-26 01:02:04,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:02:04,615 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:02:04,882 WARN L623 FunctionHandler]: Unknown extern function __list_add [2022-11-26 01:02:04,885 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_unlock_irqrestore [2022-11-26 01:02:04,892 WARN L623 FunctionHandler]: Unknown extern function debug_dma_alloc_coherent [2022-11-26 01:02:04,893 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_null [2022-11-26 01:02:04,894 WARN L623 FunctionHandler]: Unknown extern function debug_dma_free_coherent [2022-11-26 01:02:04,908 WARN L623 FunctionHandler]: Unknown extern function __tasklet_schedule [2022-11-26 01:02:04,909 WARN L623 FunctionHandler]: Unknown extern function dev_get_drvdata [2022-11-26 01:02:04,909 WARN L623 FunctionHandler]: Unknown extern function dev_set_drvdata [2022-11-26 01:02:04,917 WARN L623 FunctionHandler]: Unknown extern function input_event [2022-11-26 01:02:04,917 WARN L623 FunctionHandler]: Unknown extern function input_event [2022-11-26 01:02:04,921 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,922 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,923 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,924 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:04,924 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,927 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,928 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,929 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,930 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,930 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,931 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,932 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:04,932 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,933 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,933 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:04,933 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,934 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,934 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,934 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,935 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,937 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,938 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,944 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,946 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts_init [2022-11-26 01:02:04,946 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts_init [2022-11-26 01:02:04,947 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,948 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,950 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts [2022-11-26 01:02:04,956 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts [2022-11-26 01:02:04,957 WARN L623 FunctionHandler]: Unknown extern function dvb_filter_pes2ts [2022-11-26 01:02:04,958 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,959 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,961 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,962 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,964 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,968 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,973 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,975 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,975 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:04,976 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:04,978 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:04,979 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,979 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:04,980 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,983 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,984 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:04,985 WARN L623 FunctionHandler]: Unknown extern function usb_set_interface [2022-11-26 01:02:04,986 WARN L623 FunctionHandler]: Unknown extern function usb_set_interface [2022-11-26 01:02:04,987 WARN L623 FunctionHandler]: Unknown extern function usb_set_interface [2022-11-26 01:02:04,987 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,988 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:04,989 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,989 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:04,992 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,992 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,993 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,993 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,994 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,994 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,995 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,995 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,996 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,997 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,997 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:04,998 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,001 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,004 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:05,006 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,007 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,008 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,010 WARN L623 FunctionHandler]: Unknown extern function _raw_spin_lock_irqsave [2022-11-26 01:02:05,010 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:05,010 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:05,011 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,012 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,013 WARN L623 FunctionHandler]: Unknown extern function usb_free_urb [2022-11-26 01:02:05,013 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,014 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,015 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_urb [2022-11-26 01:02:05,016 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 01:02:05,016 WARN L623 FunctionHandler]: Unknown extern function tasklet_init [2022-11-26 01:02:05,017 WARN L623 FunctionHandler]: Unknown extern function strlcat [2022-11-26 01:02:05,019 WARN L623 FunctionHandler]: Unknown extern function input_register_device [2022-11-26 01:02:05,020 WARN L623 FunctionHandler]: Unknown extern function input_free_device [2022-11-26 01:02:05,020 WARN L623 FunctionHandler]: Unknown extern function usb_submit_urb [2022-11-26 01:02:05,021 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,021 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,023 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,024 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-11-26 01:02:05,024 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-11-26 01:02:05,025 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_urb [2022-11-26 01:02:05,026 WARN L623 FunctionHandler]: Unknown extern function usb_alloc_coherent [2022-11-26 01:02:05,026 WARN L623 FunctionHandler]: Unknown extern function usb_free_urb [2022-11-26 01:02:05,029 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,030 WARN L623 FunctionHandler]: Unknown extern function request_firmware [2022-11-26 01:02:05,030 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,031 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,031 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:05,032 WARN L623 FunctionHandler]: Unknown extern function crc32_le [2022-11-26 01:02:05,033 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,033 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:05,034 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,036 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:05,036 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:05,038 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:05,038 WARN L623 FunctionHandler]: Unknown extern function usb_bulk_msg [2022-11-26 01:02:05,039 WARN L623 FunctionHandler]: Unknown extern function release_firmware [2022-11-26 01:02:05,039 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:05,040 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,041 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,041 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,043 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,044 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,044 WARN L623 FunctionHandler]: Unknown extern function dvb_register_adapter [2022-11-26 01:02:05,045 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,046 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_init [2022-11-26 01:02:05,046 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,046 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:05,047 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_init [2022-11-26 01:02:05,047 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,047 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:05,048 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:05,049 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,049 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_release [2022-11-26 01:02:05,049 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:05,049 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:05,050 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,051 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_release [2022-11-26 01:02:05,052 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:05,052 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:05,052 WARN L623 FunctionHandler]: Unknown extern function dvb_net_init [2022-11-26 01:02:05,053 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,054 WARN L623 FunctionHandler]: Unknown extern function dvb_net_release [2022-11-26 01:02:05,055 WARN L623 FunctionHandler]: Unknown extern function dvb_dmxdev_release [2022-11-26 01:02:05,055 WARN L623 FunctionHandler]: Unknown extern function dvb_dmx_release [2022-11-26 01:02:05,055 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_frontend [2022-11-26 01:02:05,058 WARN L623 FunctionHandler]: Unknown extern function dvb_unregister_adapter [2022-11-26 01:02:05,059 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,059 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:05,060 WARN L623 FunctionHandler]: Unknown extern function usb_free_urb [2022-11-26 01:02:05,060 WARN L623 FunctionHandler]: Unknown extern function usb_free_coherent [2022-11-26 01:02:05,060 WARN L623 FunctionHandler]: Unknown extern function input_unregister_device [2022-11-26 01:02:05,061 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,061 WARN L623 FunctionHandler]: Unknown extern function usb_kill_urb [2022-11-26 01:02:05,062 WARN L623 FunctionHandler]: Unknown extern function tasklet_kill [2022-11-26 01:02:05,063 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:05,063 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:05,063 WARN L623 FunctionHandler]: Unknown extern function __raw_spin_lock_init [2022-11-26 01:02:05,064 WARN L623 FunctionHandler]: Unknown extern function list_del [2022-11-26 01:02:05,064 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:05,066 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,067 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,068 WARN L623 FunctionHandler]: Unknown extern function ttusbdecfe_dvbs_attach [2022-11-26 01:02:05,068 WARN L623 FunctionHandler]: Unknown extern function ttusbdecfe_dvbt_attach [2022-11-26 01:02:05,069 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,069 WARN L623 FunctionHandler]: Unknown extern function dvb_register_frontend [2022-11-26 01:02:05,069 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,073 WARN L623 FunctionHandler]: Unknown extern function printk [2022-11-26 01:02:05,073 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-26 01:02:05,076 WARN L623 FunctionHandler]: Unknown extern function ldv_check_return_value [2022-11-26 01:02:05,076 WARN L623 FunctionHandler]: Unknown extern function ldv_check_return_value_probe [2022-11-26 01:02:05,076 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-26 01:02:05,077 WARN L623 FunctionHandler]: Unknown extern function mutex_lock [2022-11-26 01:02:05,078 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,078 WARN L623 FunctionHandler]: Unknown extern function mutex_lock [2022-11-26 01:02:05,078 WARN L623 FunctionHandler]: Unknown extern function mutex_trylock [2022-11-26 01:02:05,079 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,079 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_interruptible [2022-11-26 01:02:05,080 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,080 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,080 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,081 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_interruptible [2022-11-26 01:02:05,081 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,082 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_interruptible [2022-11-26 01:02:05,082 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,082 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-26 01:02:05,083 WARN L237 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_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2022-11-26 01:02:05,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:02:05,229 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:02:05,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05 WrapperNode [2022-11-26 01:02:05,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:02:05,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:02:05,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:02:05,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:02:05,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,514 INFO L138 Inliner]: procedures = 216, calls = 1432, calls flagged for inlining = 108, calls inlined = 97, statements flattened = 3087 [2022-11-26 01:02:05,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:02:05,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:02:05,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:02:05,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:02:05,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,736 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:02:05,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:02:05,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:02:05,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:02:05,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (1/1) ... [2022-11-26 01:02:05,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:02:05,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:05,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:02:05,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:02:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-26 01:02:05,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-26 01:02:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_free_iso_urbs [2022-11-26 01:02:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_free_iso_urbs [2022-11-26 01:02:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-26 01:02:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-26 01:02:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-26 01:02:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-26 01:02:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2022-11-26 01:02:05,885 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2022-11-26 01:02:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2022-11-26 01:02:05,885 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2022-11-26 01:02:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-26 01:02:05,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-26 01:02:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2022-11-26 01:02:05,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2022-11-26 01:02:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2022-11-26 01:02:05,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2022-11-26 01:02:05,886 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-26 01:02:05,887 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-26 01:02:05,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-26 01:02:05,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-26 01:02:05,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2022-11-26 01:02:05,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2022-11-26 01:02:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2022-11-26 01:02:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2022-11-26 01:02:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-26 01:02:05,888 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-26 01:02:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:02:05,888 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2022-11-26 01:02:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2022-11-26 01:02:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-26 01:02:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-26 01:02:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 01:02:05,889 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-26 01:02:05,889 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-26 01:02:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-26 01:02:05,890 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-26 01:02:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:02:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 01:02:05,890 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-26 01:02:05,891 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-26 01:02:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-26 01:02:05,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-26 01:02:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-26 01:02:05,891 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-26 01:02:05,891 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-26 01:02:05,892 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-26 01:02:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-26 01:02:05,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-26 01:02:05,892 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-26 01:02:05,892 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-26 01:02:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-26 01:02:05,893 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-26 01:02:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_model [2022-11-26 01:02:05,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_model [2022-11-26 01:02:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2022-11-26 01:02:05,893 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2022-11-26 01:02:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2022-11-26 01:02:05,894 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2022-11-26 01:02:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_stop_iso_xfer [2022-11-26 01:02:05,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_stop_iso_xfer [2022-11-26 01:02:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-26 01:02:05,895 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-26 01:02:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_filter_pes2ts_init [2022-11-26 01:02:05,895 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_filter_pes2ts_init [2022-11-26 01:02:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-26 01:02:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-26 01:02:05,895 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-26 01:02:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-26 01:02:05,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-26 01:02:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-26 01:02:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2022-11-26 01:02:05,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2022-11-26 01:02:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-26 01:02:05,897 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-26 01:02:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:02:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-26 01:02:05,897 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-26 01:02:05,897 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-26 01:02:05,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-26 01:02:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-26 01:02:05,898 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-26 01:02:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-26 01:02:05,898 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-26 01:02:05,898 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-26 01:02:05,899 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-26 01:02:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_send_command [2022-11-26 01:02:05,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_send_command [2022-11-26 01:02:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:02:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_setup_urbs [2022-11-26 01:02:05,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_setup_urbs [2022-11-26 01:02:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2022-11-26 01:02:05,900 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2022-11-26 01:02:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-26 01:02:05,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-26 01:02:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_pids [2022-11-26 01:02:05,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_pids [2022-11-26 01:02:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_usb [2022-11-26 01:02:05,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_usb [2022-11-26 01:02:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:02:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:02:05,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 01:02:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2022-11-26 01:02:05,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2022-11-26 01:02:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-26 01:02:05,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-26 01:02:05,902 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-26 01:02:05,902 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-26 01:02:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2022-11-26 01:02:05,903 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2022-11-26 01:02:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-26 01:02:05,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-26 01:02:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:02:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:02:05,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:02:06,777 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:02:06,780 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:02:13,339 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:02:14,376 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:02:14,376 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 01:02:14,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:14 BoogieIcfgContainer [2022-11-26 01:02:14,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:02:14,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:02:14,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:02:14,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:02:14,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:02:02" (1/3) ... [2022-11-26 01:02:14,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f403c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:14, skipping insertion in model container [2022-11-26 01:02:14,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:05" (2/3) ... [2022-11-26 01:02:14,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f403c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:14, skipping insertion in model container [2022-11-26 01:02:14,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:14" (3/3) ... [2022-11-26 01:02:14,393 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-26 01:02:14,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:02:14,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:02:14,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:02:14,541 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2dcc5dbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:02:14,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:02:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 671 states, 415 states have (on average 1.3373493975903614) internal successors, (555), 435 states have internal predecessors, (555), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) [2022-11-26 01:02:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:02:14,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:14,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:14,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1776830020, now seen corresponding path program 1 times [2022-11-26 01:02:14,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:14,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295606776] [2022-11-26 01:02:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:14,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:15,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:15,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295606776] [2022-11-26 01:02:15,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295606776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:15,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:15,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:02:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865360446] [2022-11-26 01:02:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:15,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:15,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:15,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:15,218 INFO L87 Difference]: Start difference. First operand has 671 states, 415 states have (on average 1.3373493975903614) internal successors, (555), 435 states have internal predecessors, (555), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-26 01:02:17,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:20,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:22,576 INFO L93 Difference]: Finished difference Result 1929 states and 2814 transitions. [2022-11-26 01:02:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:22,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2022-11-26 01:02:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:22,671 INFO L225 Difference]: With dead ends: 1929 [2022-11-26 01:02:22,672 INFO L226 Difference]: Without dead ends: 1255 [2022-11-26 01:02:22,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:22,686 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 851 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:22,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 1773 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 308 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-26 01:02:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-11-26 01:02:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1251. [2022-11-26 01:02:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 778 states have (on average 1.3277634961439588) internal successors, (1033), 807 states have internal predecessors, (1033), 376 states have call successors, (376), 98 states have call predecessors, (376), 96 states have return successors, (375), 355 states have call predecessors, (375), 368 states have call successors, (375) [2022-11-26 01:02:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1784 transitions. [2022-11-26 01:02:22,912 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1784 transitions. Word has length 7 [2022-11-26 01:02:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:22,912 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1784 transitions. [2022-11-26 01:02:22,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-26 01:02:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1784 transitions. [2022-11-26 01:02:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:02:22,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:22,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:02:22,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:22,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:22,917 INFO L85 PathProgramCache]: Analyzing trace with hash 752437624, now seen corresponding path program 1 times [2022-11-26 01:02:22,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:22,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444025629] [2022-11-26 01:02:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:22,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:23,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:23,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444025629] [2022-11-26 01:02:23,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444025629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:23,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:23,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:02:23,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377703663] [2022-11-26 01:02:23,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:23,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:23,135 INFO L87 Difference]: Start difference. First operand 1251 states and 1784 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-26 01:02:25,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:27,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:30,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:31,569 INFO L93 Difference]: Finished difference Result 2461 states and 3504 transitions. [2022-11-26 01:02:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2022-11-26 01:02:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:31,593 INFO L225 Difference]: With dead ends: 2461 [2022-11-26 01:02:31,593 INFO L226 Difference]: Without dead ends: 2458 [2022-11-26 01:02:31,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:31,596 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 886 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:31,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1782 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-11-26 01:02:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-11-26 01:02:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2451. [2022-11-26 01:02:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 1528 states have (on average 1.3285340314136125) internal successors, (2030), 1580 states have internal predecessors, (2030), 730 states have call successors, (730), 195 states have call predecessors, (730), 192 states have return successors, (735), 695 states have call predecessors, (735), 722 states have call successors, (735) [2022-11-26 01:02:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 3495 transitions. [2022-11-26 01:02:31,818 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 3495 transitions. Word has length 8 [2022-11-26 01:02:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:31,819 INFO L495 AbstractCegarLoop]: Abstraction has 2451 states and 3495 transitions. [2022-11-26 01:02:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-26 01:02:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 3495 transitions. [2022-11-26 01:02:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:02:31,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:31,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:31,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:02:31,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1850328127, now seen corresponding path program 1 times [2022-11-26 01:02:31,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:31,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308946627] [2022-11-26 01:02:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:31,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:31,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308946627] [2022-11-26 01:02:31,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308946627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:31,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:31,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:02:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078863691] [2022-11-26 01:02:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:31,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:31,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:31,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:31,994 INFO L87 Difference]: Start difference. First operand 2451 states and 3495 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-26 01:02:34,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:36,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:39,356 INFO L93 Difference]: Finished difference Result 3662 states and 5216 transitions. [2022-11-26 01:02:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:39,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2022-11-26 01:02:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:39,383 INFO L225 Difference]: With dead ends: 3662 [2022-11-26 01:02:39,383 INFO L226 Difference]: Without dead ends: 3659 [2022-11-26 01:02:39,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:39,387 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 882 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:39,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 1998 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-26 01:02:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3659 states. [2022-11-26 01:02:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3659 to 3652. [2022-11-26 01:02:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 2279 states have (on average 1.3286529179464677) internal successors, (3028), 2354 states have internal predecessors, (3028), 1084 states have call successors, (1084), 292 states have call predecessors, (1084), 288 states have return successors, (1095), 1035 states have call predecessors, (1095), 1076 states have call successors, (1095) [2022-11-26 01:02:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 5207 transitions. [2022-11-26 01:02:39,721 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 5207 transitions. Word has length 9 [2022-11-26 01:02:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:39,721 INFO L495 AbstractCegarLoop]: Abstraction has 3652 states and 5207 transitions. [2022-11-26 01:02:39,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-26 01:02:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 5207 transitions. [2022-11-26 01:02:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:02:39,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:39,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:39,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:02:39,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1525200219, now seen corresponding path program 1 times [2022-11-26 01:02:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:39,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179899047] [2022-11-26 01:02:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:39,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:39,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179899047] [2022-11-26 01:02:39,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179899047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:39,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:39,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:02:39,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167148484] [2022-11-26 01:02:39,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:39,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:39,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:39,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:39,921 INFO L87 Difference]: Start difference. First operand 3652 states and 5207 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-26 01:02:42,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:45,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:47,700 INFO L93 Difference]: Finished difference Result 7020 states and 10128 transitions. [2022-11-26 01:02:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2022-11-26 01:02:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:47,749 INFO L225 Difference]: With dead ends: 7020 [2022-11-26 01:02:47,749 INFO L226 Difference]: Without dead ends: 7011 [2022-11-26 01:02:47,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:47,756 INFO L413 NwaCegarLoop]: 1202 mSDtfsCounter, 873 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:47,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1989 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 338 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-26 01:02:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7011 states. [2022-11-26 01:02:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7011 to 7004. [2022-11-26 01:02:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 4368 states have (on average 1.3262362637362637) internal successors, (5793), 4510 states have internal predecessors, (5793), 2068 states have call successors, (2068), 574 states have call predecessors, (2068), 567 states have return successors, (2243), 1979 states have call predecessors, (2243), 2060 states have call successors, (2243) [2022-11-26 01:02:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 10104 transitions. [2022-11-26 01:02:48,270 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 10104 transitions. Word has length 10 [2022-11-26 01:02:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:48,271 INFO L495 AbstractCegarLoop]: Abstraction has 7004 states and 10104 transitions. [2022-11-26 01:02:48,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-26 01:02:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 10104 transitions. [2022-11-26 01:02:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-26 01:02:48,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:48,279 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:48,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 01:02:48,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash -327150663, now seen corresponding path program 1 times [2022-11-26 01:02:48,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:48,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586713499] [2022-11-26 01:02:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 01:02:48,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:48,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586713499] [2022-11-26 01:02:48,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586713499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:48,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:48,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:02:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760608483] [2022-11-26 01:02:48,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:48,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:48,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:48,772 INFO L87 Difference]: Start difference. First operand 7004 states and 10104 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-26 01:02:51,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:54,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:02:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:55,145 INFO L93 Difference]: Finished difference Result 14079 states and 20338 transitions. [2022-11-26 01:02:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 84 [2022-11-26 01:02:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:55,206 INFO L225 Difference]: With dead ends: 14079 [2022-11-26 01:02:55,206 INFO L226 Difference]: Without dead ends: 7076 [2022-11-26 01:02:55,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:55,245 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 232 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:55,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1322 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-26 01:02:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7076 states. [2022-11-26 01:02:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7076 to 7076. [2022-11-26 01:02:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 4440 states have (on average 1.3288288288288288) internal successors, (5900), 4582 states have internal predecessors, (5900), 2068 states have call successors, (2068), 574 states have call predecessors, (2068), 567 states have return successors, (2243), 1979 states have call predecessors, (2243), 2060 states have call successors, (2243) [2022-11-26 01:02:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 10211 transitions. [2022-11-26 01:02:55,819 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 10211 transitions. Word has length 84 [2022-11-26 01:02:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:55,819 INFO L495 AbstractCegarLoop]: Abstraction has 7076 states and 10211 transitions. [2022-11-26 01:02:55,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-26 01:02:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 10211 transitions. [2022-11-26 01:02:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 01:02:55,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:55,828 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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] [2022-11-26 01:02:55,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 01:02:55,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1598647191, now seen corresponding path program 1 times [2022-11-26 01:02:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:55,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975907889] [2022-11-26 01:02:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:02:56,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:56,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975907889] [2022-11-26 01:02:56,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975907889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:56,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:56,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:02:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620494046] [2022-11-26 01:02:56,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:56,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:56,208 INFO L87 Difference]: Start difference. First operand 7076 states and 10211 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 01:02:58,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:02,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:04,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:05,416 INFO L93 Difference]: Finished difference Result 13914 states and 20032 transitions. [2022-11-26 01:03:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 87 [2022-11-26 01:03:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:05,492 INFO L225 Difference]: With dead ends: 13914 [2022-11-26 01:03:05,492 INFO L226 Difference]: Without dead ends: 6839 [2022-11-26 01:03:05,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:05,529 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 823 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:05,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 1780 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2022-11-26 01:03:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2022-11-26 01:03:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 6816. [2022-11-26 01:03:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6816 states, 4258 states have (on average 1.319868482855801) internal successors, (5620), 4400 states have internal predecessors, (5620), 1992 states have call successors, (1992), 572 states have call predecessors, (1992), 565 states have return successors, (2159), 1903 states have call predecessors, (2159), 1984 states have call successors, (2159) [2022-11-26 01:03:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6816 states to 6816 states and 9771 transitions. [2022-11-26 01:03:06,072 INFO L78 Accepts]: Start accepts. Automaton has 6816 states and 9771 transitions. Word has length 87 [2022-11-26 01:03:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:06,076 INFO L495 AbstractCegarLoop]: Abstraction has 6816 states and 9771 transitions. [2022-11-26 01:03:06,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-26 01:03:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6816 states and 9771 transitions. [2022-11-26 01:03:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 01:03:06,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:06,083 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:06,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 01:03:06,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -916185617, now seen corresponding path program 1 times [2022-11-26 01:03:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:06,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502908866] [2022-11-26 01:03:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:03:06,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:06,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502908866] [2022-11-26 01:03:06,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502908866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:06,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:06,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:03:06,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003616486] [2022-11-26 01:03:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:03:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:03:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:06,877 INFO L87 Difference]: Start difference. First operand 6816 states and 9771 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 01:03:09,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:14,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:15,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:17,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:20,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:23,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:23,511 INFO L93 Difference]: Finished difference Result 17083 states and 25605 transitions. [2022-11-26 01:03:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:03:23,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 98 [2022-11-26 01:03:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:23,585 INFO L225 Difference]: With dead ends: 17083 [2022-11-26 01:03:23,585 INFO L226 Difference]: Without dead ends: 10268 [2022-11-26 01:03:23,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:03:23,623 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 718 mSDsluCounter, 2852 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 216 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 3919 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:23,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 3919 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 718 Invalid, 4 Unknown, 0 Unchecked, 15.8s Time] [2022-11-26 01:03:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2022-11-26 01:03:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 6440. [2022-11-26 01:03:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6440 states, 4024 states have (on average 1.3133697813121272) internal successors, (5285), 4159 states have internal predecessors, (5285), 1861 states have call successors, (1861), 561 states have call predecessors, (1861), 554 states have return successors, (2017), 1777 states have call predecessors, (2017), 1853 states have call successors, (2017) [2022-11-26 01:03:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6440 states to 6440 states and 9163 transitions. [2022-11-26 01:03:24,337 INFO L78 Accepts]: Start accepts. Automaton has 6440 states and 9163 transitions. Word has length 98 [2022-11-26 01:03:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:24,338 INFO L495 AbstractCegarLoop]: Abstraction has 6440 states and 9163 transitions. [2022-11-26 01:03:24,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 01:03:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6440 states and 9163 transitions. [2022-11-26 01:03:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-26 01:03:24,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:24,349 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:24,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 01:03:24,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash -314299324, now seen corresponding path program 1 times [2022-11-26 01:03:24,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:24,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076199334] [2022-11-26 01:03:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:24,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:03:24,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076199334] [2022-11-26 01:03:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076199334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:24,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:24,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:03:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846106319] [2022-11-26 01:03:24,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:24,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:24,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:24,771 INFO L87 Difference]: Start difference. First operand 6440 states and 9163 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:03:27,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:30,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:31,418 INFO L93 Difference]: Finished difference Result 14351 states and 20824 transitions. [2022-11-26 01:03:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2022-11-26 01:03:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:31,467 INFO L225 Difference]: With dead ends: 14351 [2022-11-26 01:03:31,467 INFO L226 Difference]: Without dead ends: 7912 [2022-11-26 01:03:31,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:03:31,601 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 118 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:31,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1817 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-26 01:03:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7912 states. [2022-11-26 01:03:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7912 to 6449. [2022-11-26 01:03:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6449 states, 4033 states have (on average 1.3126704686337713) internal successors, (5294), 4168 states have internal predecessors, (5294), 1861 states have call successors, (1861), 561 states have call predecessors, (1861), 554 states have return successors, (2017), 1777 states have call predecessors, (2017), 1853 states have call successors, (2017) [2022-11-26 01:03:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6449 states to 6449 states and 9172 transitions. [2022-11-26 01:03:32,146 INFO L78 Accepts]: Start accepts. Automaton has 6449 states and 9172 transitions. Word has length 105 [2022-11-26 01:03:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:32,150 INFO L495 AbstractCegarLoop]: Abstraction has 6449 states and 9172 transitions. [2022-11-26 01:03:32,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 01:03:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 6449 states and 9172 transitions. [2022-11-26 01:03:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-26 01:03:32,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:32,154 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:32,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 01:03:32,155 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1464438342, now seen corresponding path program 1 times [2022-11-26 01:03:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:32,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301642975] [2022-11-26 01:03:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:03:32,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301642975] [2022-11-26 01:03:32,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301642975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:32,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:03:32,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:03:32,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910143212] [2022-11-26 01:03:32,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:03:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:03:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:03:32,624 INFO L87 Difference]: Start difference. First operand 6449 states and 9172 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 01:03:37,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:40,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:40,847 INFO L93 Difference]: Finished difference Result 12971 states and 18440 transitions. [2022-11-26 01:03:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:03:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 103 [2022-11-26 01:03:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:40,888 INFO L225 Difference]: With dead ends: 12971 [2022-11-26 01:03:40,889 INFO L226 Difference]: Without dead ends: 6521 [2022-11-26 01:03:40,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:40,916 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 21 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:40,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2420 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 446 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-11-26 01:03:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2022-11-26 01:03:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 6463. [2022-11-26 01:03:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6463 states, 4047 states have (on average 1.3113417346182357) internal successors, (5307), 4182 states have internal predecessors, (5307), 1861 states have call successors, (1861), 561 states have call predecessors, (1861), 554 states have return successors, (2017), 1777 states have call predecessors, (2017), 1853 states have call successors, (2017) [2022-11-26 01:03:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 9185 transitions. [2022-11-26 01:03:41,554 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 9185 transitions. Word has length 103 [2022-11-26 01:03:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:41,554 INFO L495 AbstractCegarLoop]: Abstraction has 6463 states and 9185 transitions. [2022-11-26 01:03:41,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 01:03:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 9185 transitions. [2022-11-26 01:03:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-26 01:03:41,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:41,557 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 01:03:41,558 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1466335027, now seen corresponding path program 1 times [2022-11-26 01:03:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:41,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140511787] [2022-11-26 01:03:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:03:42,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:42,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140511787] [2022-11-26 01:03:42,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140511787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:42,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275490440] [2022-11-26 01:03:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:42,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:42,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:42,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:03:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:03:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:03:43,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:03:43,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275490440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:43,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:03:43,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 01:03:43,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621438530] [2022-11-26 01:03:43,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:43,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:43,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:43,214 INFO L87 Difference]: Start difference. First operand 6463 states and 9185 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-26 01:03:47,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:49,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:50,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:50,653 INFO L93 Difference]: Finished difference Result 12945 states and 18438 transitions. [2022-11-26 01:03:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:03:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 115 [2022-11-26 01:03:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:50,688 INFO L225 Difference]: With dead ends: 12945 [2022-11-26 01:03:50,688 INFO L226 Difference]: Without dead ends: 6483 [2022-11-26 01:03:50,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:50,711 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 2 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:50,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1600 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-11-26 01:03:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6483 states. [2022-11-26 01:03:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6483 to 6473. [2022-11-26 01:03:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6473 states, 4057 states have (on average 1.3105743159970422) internal successors, (5317), 4192 states have internal predecessors, (5317), 1861 states have call successors, (1861), 561 states have call predecessors, (1861), 554 states have return successors, (2017), 1777 states have call predecessors, (2017), 1853 states have call successors, (2017) [2022-11-26 01:03:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6473 states to 6473 states and 9195 transitions. [2022-11-26 01:03:51,368 INFO L78 Accepts]: Start accepts. Automaton has 6473 states and 9195 transitions. Word has length 115 [2022-11-26 01:03:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:51,369 INFO L495 AbstractCegarLoop]: Abstraction has 6473 states and 9195 transitions. [2022-11-26 01:03:51,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-26 01:03:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6473 states and 9195 transitions. [2022-11-26 01:03:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-26 01:03:51,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:51,373 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:51,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:03:51,586 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1529102833, now seen corresponding path program 1 times [2022-11-26 01:03:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:51,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061045563] [2022-11-26 01:03:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 01:03:52,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:52,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061045563] [2022-11-26 01:03:52,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061045563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:52,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016529616] [2022-11-26 01:03:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:52,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:52,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:52,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:03:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 2320 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:03:53,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:03:53,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:03:53,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016529616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:53,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:03:53,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 01:03:53,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012372097] [2022-11-26 01:03:53,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:53,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:03:53,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:03:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:03:53,267 INFO L87 Difference]: Start difference. First operand 6473 states and 9195 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-26 01:03:56,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:03:59,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:04:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:00,263 INFO L93 Difference]: Finished difference Result 12955 states and 18438 transitions. [2022-11-26 01:04:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 117 [2022-11-26 01:04:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:00,299 INFO L225 Difference]: With dead ends: 12955 [2022-11-26 01:04:00,299 INFO L226 Difference]: Without dead ends: 6483 [2022-11-26 01:04:00,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:04:00,326 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 0 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:00,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1601 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2022-11-26 01:04:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6483 states. [2022-11-26 01:04:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6483 to 6483. [2022-11-26 01:04:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 4067 states have (on average 1.3098106712564543) internal successors, (5327), 4202 states have internal predecessors, (5327), 1861 states have call successors, (1861), 561 states have call predecessors, (1861), 554 states have return successors, (2017), 1777 states have call predecessors, (2017), 1853 states have call successors, (2017) [2022-11-26 01:04:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 9205 transitions. [2022-11-26 01:04:00,952 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 9205 transitions. Word has length 117 [2022-11-26 01:04:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:00,953 INFO L495 AbstractCegarLoop]: Abstraction has 6483 states and 9205 transitions. [2022-11-26 01:04:00,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-26 01:04:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 9205 transitions. [2022-11-26 01:04:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-26 01:04:00,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:00,956 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:00,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:01,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:01,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash -997694532, now seen corresponding path program 1 times [2022-11-26 01:04:01,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382810094] [2022-11-26 01:04:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 01:04:01,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382810094] [2022-11-26 01:04:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382810094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143779392] [2022-11-26 01:04:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:01,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:01,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:01,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:01,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:04:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:02,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:04:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:04:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 01:04:03,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143779392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:03,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294798009] [2022-11-26 01:04:03,097 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2022-11-26 01:04:03,098 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:03,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:03,109 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:03,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:11,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:04:11,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:04:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,223 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-26 01:04:19,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 01:04:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,652 INFO L217 Elim1Store]: Index analysis took 260 ms [2022-11-26 01:04:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:21,170 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-26 01:04:21,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-26 01:04:22,015 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 01:04:22,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 01:04:22,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:22,165 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-26 01:04:22,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-26 01:04:22,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 01:04:25,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-26 01:04:25,096 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-26 01:04:25,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-26 01:04:25,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:04:25,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 431 treesize of output 391 [2022-11-26 01:04:25,749 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-26 01:04:25,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 01:04:25,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 424 treesize of output 384 [2022-11-26 01:04:28,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-26 01:04:28,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:04:28,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:04:29,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-26 01:04:29,092 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-26 01:04:29,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-26 01:04:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:04:29,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 443 treesize of output 403 [2022-11-26 01:04:29,689 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-26 01:04:29,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 432 [2022-11-26 01:04:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 396 [2022-11-26 01:04:33,764 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 01:04:33,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:04:33,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 01:04:33,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116454841] [2022-11-26 01:04:33,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:04:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:04:33,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:33,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:04:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:33,771 INFO L87 Difference]: Start difference. First operand 6483 states and 9205 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-26 01:04:36,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:04:41,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:04:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:42,449 INFO L93 Difference]: Finished difference Result 18855 states and 28367 transitions. [2022-11-26 01:04:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:04:42,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 118 [2022-11-26 01:04:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:42,530 INFO L225 Difference]: With dead ends: 18855 [2022-11-26 01:04:42,530 INFO L226 Difference]: Without dead ends: 12373 [2022-11-26 01:04:42,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:04:42,567 INFO L413 NwaCegarLoop]: 1107 mSDtfsCounter, 932 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 183 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:42,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 2191 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 725 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-26 01:04:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12373 states. [2022-11-26 01:04:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12373 to 6591. [2022-11-26 01:04:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6591 states, 4148 states have (on average 1.3102700096432016) internal successors, (5435), 4283 states have internal predecessors, (5435), 1888 states have call successors, (1888), 561 states have call predecessors, (1888), 554 states have return successors, (2044), 1804 states have call predecessors, (2044), 1880 states have call successors, (2044) [2022-11-26 01:04:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 9367 transitions. [2022-11-26 01:04:43,448 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 9367 transitions. Word has length 118 [2022-11-26 01:04:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:43,450 INFO L495 AbstractCegarLoop]: Abstraction has 6591 states and 9367 transitions. [2022-11-26 01:04:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-26 01:04:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 9367 transitions. [2022-11-26 01:04:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-26 01:04:43,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:43,455 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:43,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:43,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:43,669 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1903216939, now seen corresponding path program 1 times [2022-11-26 01:04:43,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:43,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967653893] [2022-11-26 01:04:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:43,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-26 01:04:44,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967653893] [2022-11-26 01:04:44,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967653893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:44,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:04:44,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:04:44,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766014411] [2022-11-26 01:04:44,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:44,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:44,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:44,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:44,131 INFO L87 Difference]: Start difference. First operand 6591 states and 9367 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 01:04:46,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:04:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:50,417 INFO L93 Difference]: Finished difference Result 13217 states and 18815 transitions. [2022-11-26 01:04:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:50,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 152 [2022-11-26 01:04:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:50,447 INFO L225 Difference]: With dead ends: 13217 [2022-11-26 01:04:50,448 INFO L226 Difference]: Without dead ends: 6627 [2022-11-26 01:04:50,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:04:50,468 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 1 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:50,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1600 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-26 01:04:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2022-11-26 01:04:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6603. [2022-11-26 01:04:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 4160 states have (on average 1.309375) internal successors, (5447), 4295 states have internal predecessors, (5447), 1888 states have call successors, (1888), 561 states have call predecessors, (1888), 554 states have return successors, (2044), 1804 states have call predecessors, (2044), 1880 states have call successors, (2044) [2022-11-26 01:04:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 9379 transitions. [2022-11-26 01:04:51,058 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 9379 transitions. Word has length 152 [2022-11-26 01:04:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:51,059 INFO L495 AbstractCegarLoop]: Abstraction has 6603 states and 9379 transitions. [2022-11-26 01:04:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-26 01:04:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 9379 transitions. [2022-11-26 01:04:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-26 01:04:51,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:51,063 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 01:04:51,064 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash 250395536, now seen corresponding path program 1 times [2022-11-26 01:04:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:51,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870626177] [2022-11-26 01:04:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:51,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-26 01:04:51,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:51,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870626177] [2022-11-26 01:04:51,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870626177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:51,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196511901] [2022-11-26 01:04:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:51,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:51,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:51,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:51,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:04:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 2472 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:04:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 01:04:52,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:04:52,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196511901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:52,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:04:52,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 01:04:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43959202] [2022-11-26 01:04:52,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:04:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:04:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:04:52,961 INFO L87 Difference]: Start difference. First operand 6603 states and 9379 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-26 01:04:56,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:04:58,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:04:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:59,375 INFO L93 Difference]: Finished difference Result 13241 states and 18860 transitions. [2022-11-26 01:04:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:04:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 157 [2022-11-26 01:04:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:59,410 INFO L225 Difference]: With dead ends: 13241 [2022-11-26 01:04:59,411 INFO L226 Difference]: Without dead ends: 6639 [2022-11-26 01:04:59,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:04:59,437 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 1 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:59,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1600 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-26 01:04:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2022-11-26 01:05:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 6615. [2022-11-26 01:05:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6615 states, 4172 states have (on average 1.3084851390220518) internal successors, (5459), 4307 states have internal predecessors, (5459), 1888 states have call successors, (1888), 561 states have call predecessors, (1888), 554 states have return successors, (2044), 1804 states have call predecessors, (2044), 1880 states have call successors, (2044) [2022-11-26 01:05:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6615 states to 6615 states and 9391 transitions. [2022-11-26 01:05:00,163 INFO L78 Accepts]: Start accepts. Automaton has 6615 states and 9391 transitions. Word has length 157 [2022-11-26 01:05:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:00,164 INFO L495 AbstractCegarLoop]: Abstraction has 6615 states and 9391 transitions. [2022-11-26 01:05:00,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-26 01:05:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6615 states and 9391 transitions. [2022-11-26 01:05:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-26 01:05:00,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:00,168 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-26 01:05:00,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:05:00,381 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2126013519, now seen corresponding path program 2 times [2022-11-26 01:05:00,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:00,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332107347] [2022-11-26 01:05:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-26 01:05:00,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:00,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332107347] [2022-11-26 01:05:00,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332107347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:00,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052914501] [2022-11-26 01:05:00,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:05:00,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:00,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:00,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:05:02,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-26 01:05:02,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:05:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:05:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-26 01:05:02,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:05:02,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052914501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:02,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:05:02,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 01:05:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676461161] [2022-11-26 01:05:02,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:02,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:05:02,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:02,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:05:02,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:05:02,148 INFO L87 Difference]: Start difference. First operand 6615 states and 9391 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 01:05:07,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:05:10,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:05:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:10,546 INFO L93 Difference]: Finished difference Result 6663 states and 9479 transitions. [2022-11-26 01:05:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:05:10,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 148 [2022-11-26 01:05:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:10,587 INFO L225 Difference]: With dead ends: 6663 [2022-11-26 01:05:10,587 INFO L226 Difference]: Without dead ends: 6660 [2022-11-26 01:05:10,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:05:10,594 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 51 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:10,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2323 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 490 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2022-11-26 01:05:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6660 states. [2022-11-26 01:05:11,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6660 to 6660. [2022-11-26 01:05:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6660 states, 4201 states have (on average 1.3077838609854797) internal successors, (5494), 4341 states have internal predecessors, (5494), 1887 states have call successors, (1887), 572 states have call predecessors, (1887), 571 states have return successors, (2090), 1804 states have call predecessors, (2090), 1880 states have call successors, (2090) [2022-11-26 01:05:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6660 states to 6660 states and 9471 transitions. [2022-11-26 01:05:11,227 INFO L78 Accepts]: Start accepts. Automaton has 6660 states and 9471 transitions. Word has length 148 [2022-11-26 01:05:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:11,233 INFO L495 AbstractCegarLoop]: Abstraction has 6660 states and 9471 transitions. [2022-11-26 01:05:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-26 01:05:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6660 states and 9471 transitions. [2022-11-26 01:05:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-26 01:05:11,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:11,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:11,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:11,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:05:11,450 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:11,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:11,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1290033677, now seen corresponding path program 1 times [2022-11-26 01:05:11,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:11,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948253280] [2022-11-26 01:05:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:11,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-26 01:05:11,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948253280] [2022-11-26 01:05:11,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948253280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356739299] [2022-11-26 01:05:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:11,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:11,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:11,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:05:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:05:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 01:05:13,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-26 01:05:13,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356739299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365066541] [2022-11-26 01:05:13,539 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-11-26 01:05:13,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:13,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:13,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:13,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:20,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:05:20,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:05:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,032 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-26 01:05:38,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2797 treesize of output 2799 [2022-11-26 01:05:38,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,440 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-26 01:05:38,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2785 treesize of output 2777 [2022-11-26 01:05:38,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,126 INFO L217 Elim1Store]: Index analysis took 239 ms [2022-11-26 01:05:39,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:40,769 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-26 01:05:40,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 888 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 2827 treesize of output 2591 [2022-11-26 01:05:41,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:41,243 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-26 01:05:41,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2781 treesize of output 2785 [2022-11-26 01:05:41,602 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-26 01:05:41,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 2759 treesize of output 2759 [2022-11-26 01:05:46,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-26 01:05:46,682 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-26 01:05:46,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-26 01:05:46,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:05:47,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 187 [2022-11-26 01:05:47,427 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-26 01:05:47,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 230 treesize of output 219 [2022-11-26 01:05:47,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 180 [2022-11-26 01:05:48,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-26 01:05:48,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:05:48,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:05:48,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-26 01:05:48,602 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-26 01:05:48,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-26 01:05:48,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:05:49,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 199 [2022-11-26 01:05:49,251 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-26 01:05:49,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 242 treesize of output 228 [2022-11-26 01:05:49,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 192 [2022-11-26 01:05:50,700 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 01:05:50,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:50,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 01:05:50,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111758201] [2022-11-26 01:05:50,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:50,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:05:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:05:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:05:50,708 INFO L87 Difference]: Start difference. First operand 6660 states and 9471 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 5 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) [2022-11-26 01:05:55,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:05:57,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:05:59,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:06:01,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:06:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:06:02,226 INFO L93 Difference]: Finished difference Result 13427 states and 19143 transitions. [2022-11-26 01:06:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:06:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 5 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) Word has length 165 [2022-11-26 01:06:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:06:02,252 INFO L225 Difference]: With dead ends: 13427 [2022-11-26 01:06:02,252 INFO L226 Difference]: Without dead ends: 6768 [2022-11-26 01:06:02,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:06:02,274 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 2 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2393 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:06:02,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2393 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 452 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2022-11-26 01:06:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2022-11-26 01:06:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6768. [2022-11-26 01:06:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6768 states, 4273 states have (on average 1.3025977065293706) internal successors, (5566), 4413 states have internal predecessors, (5566), 1923 states have call successors, (1923), 572 states have call predecessors, (1923), 571 states have return successors, (2126), 1840 states have call predecessors, (2126), 1916 states have call successors, (2126) [2022-11-26 01:06:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6768 states to 6768 states and 9615 transitions. [2022-11-26 01:06:02,803 INFO L78 Accepts]: Start accepts. Automaton has 6768 states and 9615 transitions. Word has length 165 [2022-11-26 01:06:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:06:02,804 INFO L495 AbstractCegarLoop]: Abstraction has 6768 states and 9615 transitions. [2022-11-26 01:06:02,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 5 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) [2022-11-26 01:06:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6768 states and 9615 transitions. [2022-11-26 01:06:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-26 01:06:02,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:06:02,810 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:06:02,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:06:03,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 01:06:03,024 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:06:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:06:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1312379186, now seen corresponding path program 2 times [2022-11-26 01:06:03,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:06:03,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220713535] [2022-11-26 01:06:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:03,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:06:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-26 01:06:03,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:06:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220713535] [2022-11-26 01:06:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220713535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:06:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981897359] [2022-11-26 01:06:03,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:06:03,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:03,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:06:03,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:06:03,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:06:04,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-26 01:06:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:06:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:06:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-26 01:06:04,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:06:04,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981897359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:06:04,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:06:04,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2022-11-26 01:06:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128383744] [2022-11-26 01:06:04,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:06:04,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:06:04,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:06:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:06:04,751 INFO L87 Difference]: Start difference. First operand 6768 states and 9615 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-26 01:06:11,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:06:14,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:06:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:06:14,403 INFO L93 Difference]: Finished difference Result 6795 states and 9641 transitions. [2022-11-26 01:06:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:06:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 180 [2022-11-26 01:06:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:06:14,436 INFO L225 Difference]: With dead ends: 6795 [2022-11-26 01:06:14,437 INFO L226 Difference]: Without dead ends: 6792 [2022-11-26 01:06:14,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:06:14,443 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 15 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:06:14,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 3925 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 794 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2022-11-26 01:06:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2022-11-26 01:06:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 6792. [2022-11-26 01:06:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6792 states, 4291 states have (on average 1.3013283616872524) internal successors, (5584), 4425 states have internal predecessors, (5584), 1923 states have call successors, (1923), 584 states have call predecessors, (1923), 577 states have return successors, (2126), 1840 states have call predecessors, (2126), 1916 states have call successors, (2126) [2022-11-26 01:06:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6792 states to 6792 states and 9633 transitions. [2022-11-26 01:06:15,084 INFO L78 Accepts]: Start accepts. Automaton has 6792 states and 9633 transitions. Word has length 180 [2022-11-26 01:06:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:06:15,085 INFO L495 AbstractCegarLoop]: Abstraction has 6792 states and 9633 transitions. [2022-11-26 01:06:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-26 01:06:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states and 9633 transitions. [2022-11-26 01:06:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-26 01:06:15,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:06:15,093 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:06:15,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:06:15,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 01:06:15,304 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:06:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:06:15,304 INFO L85 PathProgramCache]: Analyzing trace with hash 13447929, now seen corresponding path program 1 times [2022-11-26 01:06:15,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:06:15,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376103368] [2022-11-26 01:06:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:15,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:06:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-26 01:06:15,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:06:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376103368] [2022-11-26 01:06:15,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376103368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:06:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948789962] [2022-11-26 01:06:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:15,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:06:15,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:06:15,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:06:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:06:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-26 01:06:17,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:06:17,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948789962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:06:17,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:06:17,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 01:06:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557670850] [2022-11-26 01:06:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:06:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:06:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:06:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:06:17,143 INFO L87 Difference]: Start difference. First operand 6792 states and 9633 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-26 01:06:20,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:06:23,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:06:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:06:24,903 INFO L93 Difference]: Finished difference Result 16490 states and 23986 transitions. [2022-11-26 01:06:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:06:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 188 [2022-11-26 01:06:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:06:24,956 INFO L225 Difference]: With dead ends: 16490 [2022-11-26 01:06:24,956 INFO L226 Difference]: Without dead ends: 9699 [2022-11-26 01:06:24,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:06:24,987 INFO L413 NwaCegarLoop]: 1227 mSDtfsCounter, 277 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 2119 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:06:24,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 2119 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-26 01:06:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9699 states. [2022-11-26 01:06:25,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9699 to 6792. [2022-11-26 01:06:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6792 states, 4291 states have (on average 1.298531810766721) internal successors, (5572), 4413 states have internal predecessors, (5572), 1923 states have call successors, (1923), 584 states have call predecessors, (1923), 577 states have return successors, (2126), 1840 states have call predecessors, (2126), 1916 states have call successors, (2126) [2022-11-26 01:06:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6792 states to 6792 states and 9621 transitions. [2022-11-26 01:06:25,906 INFO L78 Accepts]: Start accepts. Automaton has 6792 states and 9621 transitions. Word has length 188 [2022-11-26 01:06:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:06:25,906 INFO L495 AbstractCegarLoop]: Abstraction has 6792 states and 9621 transitions. [2022-11-26 01:06:25,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-26 01:06:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states and 9621 transitions. [2022-11-26 01:06:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-26 01:06:25,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:06:25,914 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:06:25,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:06:26,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 01:06:26,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:06:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:06:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1509040496, now seen corresponding path program 1 times [2022-11-26 01:06:26,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:06:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487236193] [2022-11-26 01:06:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:26,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:06:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-26 01:06:26,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:06:26,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487236193] [2022-11-26 01:06:26,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487236193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:06:26,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988339835] [2022-11-26 01:06:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:26,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:26,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:06:26,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:06:26,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:06:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:06:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-26 01:06:28,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:06:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-26 01:06:28,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988339835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:06:28,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524009289] [2022-11-26 01:06:28,555 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-26 01:06:28,555 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:06:28,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:06:28,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:06:28,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:06:34,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:06:34,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:06:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:40,939 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-26 01:06:40,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-26 01:06:40,996 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:06:40,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 01:06:41,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,369 INFO L217 Elim1Store]: Index analysis took 260 ms [2022-11-26 01:06:41,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:42,905 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-26 01:06:42,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-26 01:06:43,589 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 01:06:43,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 01:06:43,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:43,711 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-26 01:06:43,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 01:06:45,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-26 01:06:45,757 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-26 01:06:45,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-26 01:06:45,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:06:46,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 431 treesize of output 391 [2022-11-26 01:06:46,198 INFO L321 Elim1Store]: treesize reduction 180, result has 10.4 percent of original size [2022-11-26 01:06:46,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 399 [2022-11-26 01:06:46,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 355 [2022-11-26 01:06:48,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-26 01:06:48,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:06:48,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:06:48,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-26 01:06:48,879 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-26 01:06:48,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-26 01:06:48,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:06:49,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 443 treesize of output 403 [2022-11-26 01:06:49,401 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-26 01:06:49,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 432 [2022-11-26 01:06:49,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 396 [2022-11-26 01:06:52,743 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 01:06:52,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:06:52,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 01:06:52,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603784654] [2022-11-26 01:06:52,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:06:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:06:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:06:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:06:52,748 INFO L87 Difference]: Start difference. First operand 6792 states and 9621 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2022-11-26 01:06:58,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:00,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:02,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:04,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:04,563 INFO L93 Difference]: Finished difference Result 13691 states and 19464 transitions. [2022-11-26 01:07:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:07:04,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) Word has length 193 [2022-11-26 01:07:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:04,598 INFO L225 Difference]: With dead ends: 13691 [2022-11-26 01:07:04,598 INFO L226 Difference]: Without dead ends: 6900 [2022-11-26 01:07:04,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:04,627 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 2 mSDsluCounter, 2388 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:04,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3189 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 598 Invalid, 3 Unknown, 0 Unchecked, 11.4s Time] [2022-11-26 01:07:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6900 states. [2022-11-26 01:07:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6900 to 6900. [2022-11-26 01:07:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 4363 states have (on average 1.293605317442127) internal successors, (5644), 4485 states have internal predecessors, (5644), 1959 states have call successors, (1959), 584 states have call predecessors, (1959), 577 states have return successors, (2162), 1876 states have call predecessors, (2162), 1952 states have call successors, (2162) [2022-11-26 01:07:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 9765 transitions. [2022-11-26 01:07:05,312 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 9765 transitions. Word has length 193 [2022-11-26 01:07:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:05,312 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 9765 transitions. [2022-11-26 01:07:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 5 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2022-11-26 01:07:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 9765 transitions. [2022-11-26 01:07:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-26 01:07:05,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:05,321 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:05,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:05,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:05,550 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1014674472, now seen corresponding path program 1 times [2022-11-26 01:07:05,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:05,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526919693] [2022-11-26 01:07:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 01:07:06,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:06,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526919693] [2022-11-26 01:07:06,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526919693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:06,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076476400] [2022-11-26 01:07:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:06,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:06,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:06,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:06,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:07:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:07,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:07:07,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-26 01:07:07,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 01:07:07,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076476400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:07:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246803960] [2022-11-26 01:07:07,766 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-26 01:07:07,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:07:07,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:07:07,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:07:07,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:07:13,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:07:13,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:07:20,162 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:07:20,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 01:07:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,227 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-26 01:07:20,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 01:07:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,315 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-26 01:07:20,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-26 01:07:20,391 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 01:07:20,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 01:07:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,747 INFO L217 Elim1Store]: Index analysis took 214 ms [2022-11-26 01:07:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:20,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:07:22,239 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-26 01:07:22,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-26 01:07:24,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-26 01:07:24,785 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-26 01:07:24,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-26 01:07:24,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:07:25,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 187 [2022-11-26 01:07:25,547 INFO L321 Elim1Store]: treesize reduction 180, result has 10.4 percent of original size [2022-11-26 01:07:25,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 230 treesize of output 195 [2022-11-26 01:07:25,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 151 [2022-11-26 01:07:26,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:07:26,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-26 01:07:26,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:07:26,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-26 01:07:26,619 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-26 01:07:26,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-26 01:07:26,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:07:27,283 INFO L321 Elim1Store]: treesize reduction 220, result has 8.7 percent of original size [2022-11-26 01:07:27,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 242 treesize of output 204 [2022-11-26 01:07:27,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 163 [2022-11-26 01:07:27,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 163 [2022-11-26 01:07:28,814 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 01:07:28,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:07:28,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 01:07:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041424217] [2022-11-26 01:07:28,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:07:28,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:07:28,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:07:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:28,822 INFO L87 Difference]: Start difference. First operand 6900 states and 9765 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:07:33,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:35,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:36,213 INFO L93 Difference]: Finished difference Result 13829 states and 19618 transitions. [2022-11-26 01:07:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:07:36,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 190 [2022-11-26 01:07:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:36,250 INFO L225 Difference]: With dead ends: 13829 [2022-11-26 01:07:36,250 INFO L226 Difference]: Without dead ends: 6930 [2022-11-26 01:07:36,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:36,279 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 0 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:36,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2395 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 441 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-11-26 01:07:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6930 states. [2022-11-26 01:07:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6930 to 6930. [2022-11-26 01:07:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 4393 states have (on average 1.2916002731618483) internal successors, (5674), 4515 states have internal predecessors, (5674), 1959 states have call successors, (1959), 584 states have call predecessors, (1959), 577 states have return successors, (2162), 1876 states have call predecessors, (2162), 1952 states have call successors, (2162) [2022-11-26 01:07:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 9795 transitions. [2022-11-26 01:07:36,925 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 9795 transitions. Word has length 190 [2022-11-26 01:07:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:36,926 INFO L495 AbstractCegarLoop]: Abstraction has 6930 states and 9795 transitions. [2022-11-26 01:07:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:07:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 9795 transitions. [2022-11-26 01:07:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-26 01:07:36,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:36,933 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:36,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:37,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:37,148 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:37,149 INFO L85 PathProgramCache]: Analyzing trace with hash 494763015, now seen corresponding path program 2 times [2022-11-26 01:07:37,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:37,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539859799] [2022-11-26 01:07:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:37,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-26 01:07:37,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:37,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539859799] [2022-11-26 01:07:37,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539859799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:37,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327430401] [2022-11-26 01:07:37,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:07:37,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:37,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:37,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:07:39,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-26 01:07:39,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:07:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:07:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-26 01:07:39,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:07:39,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327430401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:07:39,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:07:39,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 01:07:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682406433] [2022-11-26 01:07:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:07:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:07:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:39,060 INFO L87 Difference]: Start difference. First operand 6930 states and 9795 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-26 01:07:43,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:47,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:49,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:52,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:53,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:54,500 INFO L93 Difference]: Finished difference Result 8489 states and 12258 transitions. [2022-11-26 01:07:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:07:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 193 [2022-11-26 01:07:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:54,541 INFO L225 Difference]: With dead ends: 8489 [2022-11-26 01:07:54,541 INFO L226 Difference]: Without dead ends: 8462 [2022-11-26 01:07:54,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:54,549 INFO L413 NwaCegarLoop]: 1146 mSDtfsCounter, 369 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:54,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 3048 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 462 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2022-11-26 01:07:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8462 states. [2022-11-26 01:07:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8462 to 6930. [2022-11-26 01:07:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 4393 states have (on average 1.2890962895515592) internal successors, (5663), 4515 states have internal predecessors, (5663), 1959 states have call successors, (1959), 584 states have call predecessors, (1959), 577 states have return successors, (2162), 1876 states have call predecessors, (2162), 1952 states have call successors, (2162) [2022-11-26 01:07:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 9784 transitions. [2022-11-26 01:07:55,243 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 9784 transitions. Word has length 193 [2022-11-26 01:07:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:55,243 INFO L495 AbstractCegarLoop]: Abstraction has 6930 states and 9784 transitions. [2022-11-26 01:07:55,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-26 01:07:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 9784 transitions. [2022-11-26 01:07:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-26 01:07:55,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:55,250 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:55,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:55,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:55,462 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1559180608, now seen corresponding path program 1 times [2022-11-26 01:07:55,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:55,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737711165] [2022-11-26 01:07:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:55,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-26 01:07:56,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:56,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737711165] [2022-11-26 01:07:56,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737711165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190016212] [2022-11-26 01:07:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:56,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:56,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:56,074 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:56,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:07:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:07:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-26 01:07:57,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-26 01:07:57,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190016212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:07:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [997836024] [2022-11-26 01:07:57,819 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-26 01:07:57,820 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:07:57,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:07:57,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:07:57,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:03,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:08:03,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:08:09,816 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 01:08:09,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 01:08:09,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:09,893 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-26 01:08:09,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2022-11-26 01:08:09,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,185 INFO L217 Elim1Store]: Index analysis took 192 ms [2022-11-26 01:08:10,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:11,715 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-26 01:08:11,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 155 select indices, 155 select index equivalence classes, 886 disjoint index pairs (out of 11935 index pairs), introduced 155 new quantified variables, introduced 155 case distinctions, treesize of input 1214 treesize of output 1658 [2022-11-26 01:08:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:12,650 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-26 01:08:12,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2022-11-26 01:08:12,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 01:08:14,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 46 [2022-11-26 01:08:14,239 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-26 01:08:14,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 76 [2022-11-26 01:08:14,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:08:14,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 187 [2022-11-26 01:08:14,909 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-26 01:08:14,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 230 treesize of output 219 [2022-11-26 01:08:14,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 180 [2022-11-26 01:08:15,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-26 01:08:15,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:08:15,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 01:08:15,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 56 [2022-11-26 01:08:15,972 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-26 01:08:15,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2022-11-26 01:08:15,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 39 [2022-11-26 01:08:16,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 199 [2022-11-26 01:08:16,552 INFO L321 Elim1Store]: treesize reduction 220, result has 8.7 percent of original size [2022-11-26 01:08:16,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 242 treesize of output 204 [2022-11-26 01:08:16,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 163 [2022-11-26 01:08:17,909 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: not yet implemented, we need term in nnf at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PrenexNormalForm.convertApplicationTerm(PrenexNormalForm.java:89) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:389) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:319) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 01:08:17,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:08:17,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 01:08:17,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038311887] [2022-11-26 01:08:17,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:08:17,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:08:17,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:08:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:08:17,914 INFO L87 Difference]: Start difference. First operand 6930 states and 9784 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:08:23,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:26,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:28,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:29,054 INFO L93 Difference]: Finished difference Result 14039 states and 19836 transitions. [2022-11-26 01:08:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:08:29,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 195 [2022-11-26 01:08:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:29,080 INFO L225 Difference]: With dead ends: 14039 [2022-11-26 01:08:29,080 INFO L226 Difference]: Without dead ends: 7110 [2022-11-26 01:08:29,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:08:29,099 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 4 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:29,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2394 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2022-11-26 01:08:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7110 states. [2022-11-26 01:08:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7110 to 7110. [2022-11-26 01:08:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7110 states, 4573 states have (on average 1.2842772796851083) internal successors, (5873), 4695 states have internal predecessors, (5873), 1959 states have call successors, (1959), 584 states have call predecessors, (1959), 577 states have return successors, (2162), 1876 states have call predecessors, (2162), 1952 states have call successors, (2162) [2022-11-26 01:08:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7110 states to 7110 states and 9994 transitions. [2022-11-26 01:08:29,846 INFO L78 Accepts]: Start accepts. Automaton has 7110 states and 9994 transitions. Word has length 195 [2022-11-26 01:08:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:29,847 INFO L495 AbstractCegarLoop]: Abstraction has 7110 states and 9994 transitions. [2022-11-26 01:08:29,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:08:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 7110 states and 9994 transitions. [2022-11-26 01:08:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-26 01:08:29,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:29,853 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:29,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:30,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:30,068 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:30,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1344022169, now seen corresponding path program 2 times [2022-11-26 01:08:30,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:30,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685714931] [2022-11-26 01:08:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:30,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-26 01:08:30,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:30,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685714931] [2022-11-26 01:08:30,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685714931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:08:30,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:08:30,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:08:30,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814205469] [2022-11-26 01:08:30,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:08:30,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:08:30,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:08:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:08:30,864 INFO L87 Difference]: Start difference. First operand 7110 states and 9994 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 01:08:34,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:37,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:39,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:40,264 INFO L93 Difference]: Finished difference Result 9111 states and 12797 transitions. [2022-11-26 01:08:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:08:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 208 [2022-11-26 01:08:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:40,294 INFO L225 Difference]: With dead ends: 9111 [2022-11-26 01:08:40,294 INFO L226 Difference]: Without dead ends: 9106 [2022-11-26 01:08:40,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:08:40,300 INFO L413 NwaCegarLoop]: 1107 mSDtfsCounter, 835 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:40,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 1894 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 312 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2022-11-26 01:08:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9106 states. [2022-11-26 01:08:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9106 to 9081. [2022-11-26 01:08:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9081 states, 5827 states have (on average 1.281963274412219) internal successors, (7470), 5986 states have internal predecessors, (7470), 2501 states have call successors, (2501), 763 states have call predecessors, (2501), 752 states have return successors, (2791), 2391 states have call predecessors, (2791), 2494 states have call successors, (2791) [2022-11-26 01:08:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9081 states to 9081 states and 12762 transitions. [2022-11-26 01:08:40,986 INFO L78 Accepts]: Start accepts. Automaton has 9081 states and 12762 transitions. Word has length 208 [2022-11-26 01:08:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:40,986 INFO L495 AbstractCegarLoop]: Abstraction has 9081 states and 12762 transitions. [2022-11-26 01:08:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 01:08:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 9081 states and 12762 transitions. [2022-11-26 01:08:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-26 01:08:40,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:40,993 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:40,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-26 01:08:40,994 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1609199771, now seen corresponding path program 1 times [2022-11-26 01:08:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:40,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235291142] [2022-11-26 01:08:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:40,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-26 01:08:44,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:44,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235291142] [2022-11-26 01:08:44,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235291142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:08:44,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:08:44,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 01:08:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821891841] [2022-11-26 01:08:44,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:08:44,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:08:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:08:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:08:44,048 INFO L87 Difference]: Start difference. First operand 9081 states and 12762 transitions. Second operand has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-26 01:08:46,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:52,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:08:57,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:09:00,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:00,794 INFO L93 Difference]: Finished difference Result 13117 states and 18441 transitions. [2022-11-26 01:09:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:09:00,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) Word has length 225 [2022-11-26 01:09:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:00,839 INFO L225 Difference]: With dead ends: 13117 [2022-11-26 01:09:00,839 INFO L226 Difference]: Without dead ends: 13109 [2022-11-26 01:09:00,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:09:00,848 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 968 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 488 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:00,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 2186 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2410 Invalid, 2 Unknown, 0 Unchecked, 15.6s Time] [2022-11-26 01:09:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13109 states. [2022-11-26 01:09:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13109 to 13046. [2022-11-26 01:09:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13046 states, 8348 states have (on average 1.281744130330618) internal successors, (10700), 8591 states have internal predecessors, (10700), 3607 states have call successors, (3607), 1114 states have call predecessors, (3607), 1090 states have return successors, (4035), 3429 states have call predecessors, (4035), 3600 states have call successors, (4035) [2022-11-26 01:09:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13046 states to 13046 states and 18342 transitions. [2022-11-26 01:09:01,890 INFO L78 Accepts]: Start accepts. Automaton has 13046 states and 18342 transitions. Word has length 225 [2022-11-26 01:09:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:01,891 INFO L495 AbstractCegarLoop]: Abstraction has 13046 states and 18342 transitions. [2022-11-26 01:09:01,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 4 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-26 01:09:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 13046 states and 18342 transitions. [2022-11-26 01:09:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-26 01:09:01,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:01,899 INFO L195 NwaCegarLoop]: trace histogram [16, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:01,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 01:09:01,899 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1446072710, now seen corresponding path program 2 times [2022-11-26 01:09:01,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:01,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539930476] [2022-11-26 01:09:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:01,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-26 01:09:02,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539930476] [2022-11-26 01:09:02,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539930476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355267169] [2022-11-26 01:09:02,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:09:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:02,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:02,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:02,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:09:04,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:09:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:09:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:09:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-26 01:09:04,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:04,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355267169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:04,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:04,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-26 01:09:04,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101366485] [2022-11-26 01:09:04,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:04,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:09:04,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:04,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:09:04,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:04,564 INFO L87 Difference]: Start difference. First operand 13046 states and 18342 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 01:09:09,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:09:11,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:09:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:13,098 INFO L93 Difference]: Finished difference Result 26217 states and 36877 transitions. [2022-11-26 01:09:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:09:13,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 213 [2022-11-26 01:09:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:13,172 INFO L225 Difference]: With dead ends: 26217 [2022-11-26 01:09:13,172 INFO L226 Difference]: Without dead ends: 13172 [2022-11-26 01:09:13,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:09:13,236 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 303 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 36 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:13,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1753 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 392 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-11-26 01:09:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13172 states. [2022-11-26 01:09:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13172 to 13082. [2022-11-26 01:09:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13082 states, 8384 states have (on average 1.2774332061068703) internal successors, (10710), 8627 states have internal predecessors, (10710), 3607 states have call successors, (3607), 1114 states have call predecessors, (3607), 1090 states have return successors, (4035), 3429 states have call predecessors, (4035), 3600 states have call successors, (4035) [2022-11-26 01:09:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13082 states to 13082 states and 18352 transitions. [2022-11-26 01:09:14,432 INFO L78 Accepts]: Start accepts. Automaton has 13082 states and 18352 transitions. Word has length 213 [2022-11-26 01:09:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:14,433 INFO L495 AbstractCegarLoop]: Abstraction has 13082 states and 18352 transitions. [2022-11-26 01:09:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 01:09:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 13082 states and 18352 transitions. [2022-11-26 01:09:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-26 01:09:14,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:14,441 INFO L195 NwaCegarLoop]: trace histogram [16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:14,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:14,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:14,653 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1597371723, now seen corresponding path program 1 times [2022-11-26 01:09:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:14,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268185847] [2022-11-26 01:09:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-26 01:09:24,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268185847] [2022-11-26 01:09:24,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268185847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:24,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:09:24,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:09:24,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819818873] [2022-11-26 01:09:24,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:24,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:09:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:09:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:24,384 INFO L87 Difference]: Start difference. First operand 13082 states and 18352 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-26 01:09:28,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:09:31,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:09:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:32,585 INFO L93 Difference]: Finished difference Result 26179 states and 36735 transitions. [2022-11-26 01:09:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:09:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 218 [2022-11-26 01:09:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:32,632 INFO L225 Difference]: With dead ends: 26179 [2022-11-26 01:09:32,632 INFO L226 Difference]: Without dead ends: 13098 [2022-11-26 01:09:32,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:09:32,670 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 0 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:32,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1595 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-26 01:09:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13098 states. [2022-11-26 01:09:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13098 to 13098. [2022-11-26 01:09:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13098 states, 8400 states have (on average 1.276904761904762) internal successors, (10726), 8643 states have internal predecessors, (10726), 3607 states have call successors, (3607), 1114 states have call predecessors, (3607), 1090 states have return successors, (4035), 3429 states have call predecessors, (4035), 3600 states have call successors, (4035) [2022-11-26 01:09:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13098 states to 13098 states and 18368 transitions. [2022-11-26 01:09:33,869 INFO L78 Accepts]: Start accepts. Automaton has 13098 states and 18368 transitions. Word has length 218 [2022-11-26 01:09:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:33,870 INFO L495 AbstractCegarLoop]: Abstraction has 13098 states and 18368 transitions. [2022-11-26 01:09:33,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-26 01:09:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 13098 states and 18368 transitions. [2022-11-26 01:09:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-26 01:09:33,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:33,874 INFO L195 NwaCegarLoop]: trace histogram [16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:33,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 01:09:33,875 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:33,875 INFO L85 PathProgramCache]: Analyzing trace with hash 353149430, now seen corresponding path program 1 times [2022-11-26 01:09:33,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:33,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125365695] [2022-11-26 01:09:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:33,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-26 01:09:41,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:41,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125365695] [2022-11-26 01:09:41,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125365695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:41,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241634179] [2022-11-26 01:09:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:41,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:41,675 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:41,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:09:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 3739 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 01:09:43,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-26 01:09:43,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:43,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241634179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:43,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:43,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2022-11-26 01:09:43,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626772468] [2022-11-26 01:09:43,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:09:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:09:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:09:43,876 INFO L87 Difference]: Start difference. First operand 13098 states and 18368 transitions. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-26 01:09:53,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:09:59,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:00,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:03,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:05,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:14,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:16,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:18,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:21,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:23,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:25,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:27,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:29,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:31,059 INFO L93 Difference]: Finished difference Result 40726 states and 61849 transitions. [2022-11-26 01:10:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 01:10:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 219 [2022-11-26 01:10:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:31,168 INFO L225 Difference]: With dead ends: 40726 [2022-11-26 01:10:31,168 INFO L226 Difference]: Without dead ends: 27629 [2022-11-26 01:10:31,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:10:31,210 INFO L413 NwaCegarLoop]: 1299 mSDtfsCounter, 2143 mSDsluCounter, 9427 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 937 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 10726 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:31,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2233 Valid, 10726 Invalid, 2850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [937 Valid, 1902 Invalid, 11 Unknown, 0 Unchecked, 42.5s Time] [2022-11-26 01:10:31,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27629 states. [2022-11-26 01:10:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27629 to 11639. [2022-11-26 01:10:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11639 states, 7494 states have (on average 1.2582065652522019) internal successors, (9429), 7702 states have internal predecessors, (9429), 3077 states have call successors, (3077), 1075 states have call predecessors, (3077), 1067 states have return successors, (3643), 2940 states have call predecessors, (3643), 3070 states have call successors, (3643) [2022-11-26 01:10:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11639 states to 11639 states and 16149 transitions. [2022-11-26 01:10:33,042 INFO L78 Accepts]: Start accepts. Automaton has 11639 states and 16149 transitions. Word has length 219 [2022-11-26 01:10:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:33,043 INFO L495 AbstractCegarLoop]: Abstraction has 11639 states and 16149 transitions. [2022-11-26 01:10:33,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-26 01:10:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 11639 states and 16149 transitions. [2022-11-26 01:10:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-26 01:10:33,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:33,046 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:33,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:33,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 01:10:33,247 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -835770728, now seen corresponding path program 1 times [2022-11-26 01:10:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123445] [2022-11-26 01:10:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-26 01:10:37,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123445] [2022-11-26 01:10:37,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:37,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:37,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:10:37,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418893310] [2022-11-26 01:10:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:37,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:10:37,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:37,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:10:37,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:10:37,059 INFO L87 Difference]: Start difference. First operand 11639 states and 16149 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-26 01:10:42,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:47,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:49,209 INFO L93 Difference]: Finished difference Result 14029 states and 19377 transitions. [2022-11-26 01:10:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:10:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 239 [2022-11-26 01:10:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:49,254 INFO L225 Difference]: With dead ends: 14029 [2022-11-26 01:10:49,254 INFO L226 Difference]: Without dead ends: 14018 [2022-11-26 01:10:49,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:10:49,262 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 972 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 445 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:49,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1434 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 1520 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2022-11-26 01:10:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14018 states. [2022-11-26 01:10:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14018 to 13957. [2022-11-26 01:10:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13957 states, 8956 states have (on average 1.2546895935685574) internal successors, (11237), 9217 states have internal predecessors, (11237), 3688 states have call successors, (3688), 1322 states have call predecessors, (3688), 1312 states have return successors, (4363), 3514 states have call predecessors, (4363), 3681 states have call successors, (4363) [2022-11-26 01:10:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 19288 transitions. [2022-11-26 01:10:50,765 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 19288 transitions. Word has length 239 [2022-11-26 01:10:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:50,766 INFO L495 AbstractCegarLoop]: Abstraction has 13957 states and 19288 transitions. [2022-11-26 01:10:50,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 4 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2022-11-26 01:10:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 19288 transitions. [2022-11-26 01:10:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-26 01:10:50,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:50,771 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:50,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 01:10:50,771 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1639047872, now seen corresponding path program 1 times [2022-11-26 01:10:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:50,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780058835] [2022-11-26 01:10:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-26 01:10:51,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:51,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780058835] [2022-11-26 01:10:51,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780058835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:51,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:10:51,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:10:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891864907] [2022-11-26 01:10:51,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:51,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:10:51,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:10:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:10:51,722 INFO L87 Difference]: Start difference. First operand 13957 states and 19288 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-26 01:10:55,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:10:58,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:00,364 INFO L93 Difference]: Finished difference Result 17356 states and 24015 transitions. [2022-11-26 01:11:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:11:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 241 [2022-11-26 01:11:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:00,429 INFO L225 Difference]: With dead ends: 17356 [2022-11-26 01:11:00,430 INFO L226 Difference]: Without dead ends: 17352 [2022-11-26 01:11:00,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:11:00,439 INFO L413 NwaCegarLoop]: 1000 mSDtfsCounter, 795 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:00,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1779 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-11-26 01:11:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17352 states. [2022-11-26 01:11:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17352 to 17223. [2022-11-26 01:11:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17223 states, 11010 states have (on average 1.2545867393278838) internal successors, (13813), 11362 states have internal predecessors, (13813), 4584 states have call successors, (4584), 1647 states have call predecessors, (4584), 1628 states have return successors, (5424), 4335 states have call predecessors, (5424), 4577 states have call successors, (5424) [2022-11-26 01:11:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17223 states to 17223 states and 23821 transitions. [2022-11-26 01:11:02,418 INFO L78 Accepts]: Start accepts. Automaton has 17223 states and 23821 transitions. Word has length 241 [2022-11-26 01:11:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:02,419 INFO L495 AbstractCegarLoop]: Abstraction has 17223 states and 23821 transitions. [2022-11-26 01:11:02,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-26 01:11:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 17223 states and 23821 transitions. [2022-11-26 01:11:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-26 01:11:02,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:02,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:02,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-26 01:11:02,423 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1729503496, now seen corresponding path program 1 times [2022-11-26 01:11:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:02,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093951929] [2022-11-26 01:11:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:02,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-26 01:11:02,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:02,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093951929] [2022-11-26 01:11:02,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093951929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:02,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:11:02,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:11:02,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090481936] [2022-11-26 01:11:02,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:02,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:11:02,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:11:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:11:02,764 INFO L87 Difference]: Start difference. First operand 17223 states and 23821 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-26 01:11:05,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:08,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:12,426 INFO L93 Difference]: Finished difference Result 30811 states and 42530 transitions. [2022-11-26 01:11:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:11:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 241 [2022-11-26 01:11:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:12,529 INFO L225 Difference]: With dead ends: 30811 [2022-11-26 01:11:12,529 INFO L226 Difference]: Without dead ends: 30808 [2022-11-26 01:11:12,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:11:12,543 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 837 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:12,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1785 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-26 01:11:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30808 states. [2022-11-26 01:11:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30808 to 30800. [2022-11-26 01:11:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30800 states, 19629 states have (on average 1.2528401854399103) internal successors, (24592), 20271 states have internal predecessors, (24592), 8212 states have call successors, (8212), 2997 states have call predecessors, (8212), 2958 states have return successors, (9698), 7753 states have call predecessors, (9698), 8205 states have call successors, (9698) [2022-11-26 01:11:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30800 states to 30800 states and 42502 transitions. [2022-11-26 01:11:16,543 INFO L78 Accepts]: Start accepts. Automaton has 30800 states and 42502 transitions. Word has length 241 [2022-11-26 01:11:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:16,543 INFO L495 AbstractCegarLoop]: Abstraction has 30800 states and 42502 transitions. [2022-11-26 01:11:16,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-26 01:11:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30800 states and 42502 transitions. [2022-11-26 01:11:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-26 01:11:16,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:16,550 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:16,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-26 01:11:16,550 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2074599087, now seen corresponding path program 1 times [2022-11-26 01:11:16,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:16,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442229991] [2022-11-26 01:11:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:16,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-26 01:11:17,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442229991] [2022-11-26 01:11:17,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442229991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:17,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:11:17,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:11:17,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619691871] [2022-11-26 01:11:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:17,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:11:17,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:17,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:11:17,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:11:17,106 INFO L87 Difference]: Start difference. First operand 30800 states and 42502 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-26 01:11:20,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:22,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:25,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:29,386 INFO L93 Difference]: Finished difference Result 30811 states and 42512 transitions. [2022-11-26 01:11:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:11:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 242 [2022-11-26 01:11:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:29,522 INFO L225 Difference]: With dead ends: 30811 [2022-11-26 01:11:29,522 INFO L226 Difference]: Without dead ends: 30802 [2022-11-26 01:11:29,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:11:29,536 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 834 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:29,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1788 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 3 Unknown, 0 Unchecked, 8.6s Time] [2022-11-26 01:11:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2022-11-26 01:11:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 30792. [2022-11-26 01:11:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30792 states, 19621 states have (on average 1.251057540390398) internal successors, (24547), 20263 states have internal predecessors, (24547), 8212 states have call successors, (8212), 2997 states have call predecessors, (8212), 2958 states have return successors, (9698), 7753 states have call predecessors, (9698), 8205 states have call successors, (9698) [2022-11-26 01:11:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30792 states to 30792 states and 42457 transitions. [2022-11-26 01:11:32,925 INFO L78 Accepts]: Start accepts. Automaton has 30792 states and 42457 transitions. Word has length 242 [2022-11-26 01:11:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:32,926 INFO L495 AbstractCegarLoop]: Abstraction has 30792 states and 42457 transitions. [2022-11-26 01:11:32,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-26 01:11:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30792 states and 42457 transitions. [2022-11-26 01:11:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-26 01:11:32,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:32,932 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-26 01:11:32,933 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1796882520, now seen corresponding path program 1 times [2022-11-26 01:11:32,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:32,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435383704] [2022-11-26 01:11:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-11-26 01:11:33,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:33,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435383704] [2022-11-26 01:11:33,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435383704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:33,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:11:33,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:11:33,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277624171] [2022-11-26 01:11:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:33,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:11:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:11:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:11:33,678 INFO L87 Difference]: Start difference. First operand 30792 states and 42457 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:11:39,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:41,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:11:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:49,262 INFO L93 Difference]: Finished difference Result 72601 states and 102774 transitions. [2022-11-26 01:11:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:11:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) Word has length 259 [2022-11-26 01:11:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:49,408 INFO L225 Difference]: With dead ends: 72601 [2022-11-26 01:11:49,409 INFO L226 Difference]: Without dead ends: 41810 [2022-11-26 01:11:49,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:11:49,495 INFO L413 NwaCegarLoop]: 1227 mSDtfsCounter, 273 mSDsluCounter, 3338 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 4565 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:49,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 4565 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 785 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-11-26 01:11:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41810 states. [2022-11-26 01:11:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41810 to 30794. [2022-11-26 01:11:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30794 states, 19673 states have (on average 1.2489706704620547) internal successors, (24571), 20253 states have internal predecessors, (24571), 8166 states have call successors, (8166), 2983 states have call predecessors, (8166), 2954 states have return successors, (9636), 7779 states have call predecessors, (9636), 8159 states have call successors, (9636) [2022-11-26 01:11:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30794 states to 30794 states and 42373 transitions. [2022-11-26 01:11:53,797 INFO L78 Accepts]: Start accepts. Automaton has 30794 states and 42373 transitions. Word has length 259 [2022-11-26 01:11:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:53,798 INFO L495 AbstractCegarLoop]: Abstraction has 30794 states and 42373 transitions. [2022-11-26 01:11:53,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:11:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 30794 states and 42373 transitions. [2022-11-26 01:11:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-26 01:11:53,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:53,805 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:11:53,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-26 01:11:53,806 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1093194594, now seen corresponding path program 1 times [2022-11-26 01:11:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:53,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136990815] [2022-11-26 01:11:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-26 01:11:54,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:54,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136990815] [2022-11-26 01:11:54,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136990815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:54,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:11:54,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:11:54,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130536828] [2022-11-26 01:11:54,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:54,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:11:54,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:54,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:11:54,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:11:54,387 INFO L87 Difference]: Start difference. First operand 30794 states and 42373 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-26 01:12:00,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:03,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:05,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:07,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:15,338 INFO L93 Difference]: Finished difference Result 66813 states and 94412 transitions. [2022-11-26 01:12:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:12:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) Word has length 250 [2022-11-26 01:12:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:15,497 INFO L225 Difference]: With dead ends: 66813 [2022-11-26 01:12:15,497 INFO L226 Difference]: Without dead ends: 39312 [2022-11-26 01:12:15,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:12:15,569 INFO L413 NwaCegarLoop]: 1230 mSDtfsCounter, 304 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 4570 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:15,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 4570 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 799 Invalid, 2 Unknown, 0 Unchecked, 15.5s Time] [2022-11-26 01:12:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39312 states. [2022-11-26 01:12:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39312 to 30628. [2022-11-26 01:12:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30628 states, 19559 states have (on average 1.248683470525078) internal successors, (24423), 20135 states have internal predecessors, (24423), 8120 states have call successors, (8120), 2975 states have call predecessors, (8120), 2948 states have return successors, (9586), 7739 states have call predecessors, (9586), 8113 states have call successors, (9586) [2022-11-26 01:12:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30628 states to 30628 states and 42129 transitions. [2022-11-26 01:12:19,373 INFO L78 Accepts]: Start accepts. Automaton has 30628 states and 42129 transitions. Word has length 250 [2022-11-26 01:12:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:19,373 INFO L495 AbstractCegarLoop]: Abstraction has 30628 states and 42129 transitions. [2022-11-26 01:12:19,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-26 01:12:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30628 states and 42129 transitions. [2022-11-26 01:12:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-26 01:12:19,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:19,381 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-26 01:12:19,381 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash -705170502, now seen corresponding path program 1 times [2022-11-26 01:12:19,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:19,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121623671] [2022-11-26 01:12:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:19,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-26 01:12:19,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121623671] [2022-11-26 01:12:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121623671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:19,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:12:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948729084] [2022-11-26 01:12:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:19,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:12:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:19,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:12:19,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:19,877 INFO L87 Difference]: Start difference. First operand 30628 states and 42129 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-26 01:12:26,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:29,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:31,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:32,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:34,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:39,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:40,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:47,444 INFO L93 Difference]: Finished difference Result 72280 states and 102329 transitions. [2022-11-26 01:12:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:12:47,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) Word has length 270 [2022-11-26 01:12:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:47,596 INFO L225 Difference]: With dead ends: 72280 [2022-11-26 01:12:47,596 INFO L226 Difference]: Without dead ends: 41653 [2022-11-26 01:12:47,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:12:47,682 INFO L413 NwaCegarLoop]: 1255 mSDtfsCounter, 293 mSDsluCounter, 4625 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 5880 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:47,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 5880 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1047 Invalid, 5 Unknown, 0 Unchecked, 21.9s Time] [2022-11-26 01:12:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41653 states. [2022-11-26 01:12:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41653 to 30200. [2022-11-26 01:12:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30200 states, 19269 states have (on average 1.2479111526285744) internal successors, (24046), 19870 states have internal predecessors, (24046), 7991 states have call successors, (7991), 2935 states have call predecessors, (7991), 2939 states have return successors, (9540), 7616 states have call predecessors, (9540), 7984 states have call successors, (9540) [2022-11-26 01:12:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30200 states to 30200 states and 41577 transitions. [2022-11-26 01:12:51,580 INFO L78 Accepts]: Start accepts. Automaton has 30200 states and 41577 transitions. Word has length 270 [2022-11-26 01:12:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:51,580 INFO L495 AbstractCegarLoop]: Abstraction has 30200 states and 41577 transitions. [2022-11-26 01:12:51,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-26 01:12:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 30200 states and 41577 transitions. [2022-11-26 01:12:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-26 01:12:51,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:51,586 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-26 01:12:51,586 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1041931665, now seen corresponding path program 1 times [2022-11-26 01:12:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:51,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327156647] [2022-11-26 01:12:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-26 01:12:52,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327156647] [2022-11-26 01:12:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327156647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:52,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:52,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:12:52,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677717214] [2022-11-26 01:12:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:52,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:52,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:52,114 INFO L87 Difference]: Start difference. First operand 30200 states and 41577 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:12:55,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:01,886 INFO L93 Difference]: Finished difference Result 57142 states and 78631 transitions. [2022-11-26 01:13:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 254 [2022-11-26 01:13:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:01,990 INFO L225 Difference]: With dead ends: 57142 [2022-11-26 01:13:01,990 INFO L226 Difference]: Without dead ends: 30189 [2022-11-26 01:13:02,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:13:02,063 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 327 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:02,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 2038 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-26 01:13:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30189 states. [2022-11-26 01:13:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30189 to 30184. [2022-11-26 01:13:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30184 states, 19261 states have (on average 1.2475987747261306) internal successors, (24030), 19862 states have internal predecessors, (24030), 7983 states have call successors, (7983), 2935 states have call predecessors, (7983), 2939 states have return successors, (9532), 7608 states have call predecessors, (9532), 7976 states have call successors, (9532) [2022-11-26 01:13:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30184 states to 30184 states and 41545 transitions. [2022-11-26 01:13:06,198 INFO L78 Accepts]: Start accepts. Automaton has 30184 states and 41545 transitions. Word has length 254 [2022-11-26 01:13:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:06,199 INFO L495 AbstractCegarLoop]: Abstraction has 30184 states and 41545 transitions. [2022-11-26 01:13:06,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:13:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 30184 states and 41545 transitions. [2022-11-26 01:13:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-26 01:13:06,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:06,206 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:06,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-26 01:13:06,207 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:06,208 INFO L85 PathProgramCache]: Analyzing trace with hash -427009805, now seen corresponding path program 1 times [2022-11-26 01:13:06,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:13:06,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749980146] [2022-11-26 01:13:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:06,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:13:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-26 01:13:06,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:13:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749980146] [2022-11-26 01:13:06,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749980146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:06,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:06,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:13:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375244745] [2022-11-26 01:13:06,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:13:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:13:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:13:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:13:06,631 INFO L87 Difference]: Start difference. First operand 30184 states and 41545 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:13:10,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:16,157 INFO L93 Difference]: Finished difference Result 57110 states and 78567 transitions. [2022-11-26 01:13:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 254 [2022-11-26 01:13:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:16,240 INFO L225 Difference]: With dead ends: 57110 [2022-11-26 01:13:16,240 INFO L226 Difference]: Without dead ends: 30173 [2022-11-26 01:13:16,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:13:16,301 INFO L413 NwaCegarLoop]: 1204 mSDtfsCounter, 322 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:16,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 2037 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-26 01:13:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30173 states. [2022-11-26 01:13:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30173 to 30168. [2022-11-26 01:13:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30168 states, 19253 states have (on average 1.2472861372253674) internal successors, (24014), 19854 states have internal predecessors, (24014), 7975 states have call successors, (7975), 2935 states have call predecessors, (7975), 2939 states have return successors, (9524), 7600 states have call predecessors, (9524), 7968 states have call successors, (9524) [2022-11-26 01:13:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30168 states to 30168 states and 41513 transitions. [2022-11-26 01:13:20,008 INFO L78 Accepts]: Start accepts. Automaton has 30168 states and 41513 transitions. Word has length 254 [2022-11-26 01:13:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:20,009 INFO L495 AbstractCegarLoop]: Abstraction has 30168 states and 41513 transitions. [2022-11-26 01:13:20,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:13:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 30168 states and 41513 transitions. [2022-11-26 01:13:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-26 01:13:20,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:20,013 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-26 01:13:20,014 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2042358921, now seen corresponding path program 1 times [2022-11-26 01:13:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:13:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703119821] [2022-11-26 01:13:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:13:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-26 01:13:22,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:13:22,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703119821] [2022-11-26 01:13:22,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703119821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:22,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479096342] [2022-11-26 01:13:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:22,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:22,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:22,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:13:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:24,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:13:24,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-26 01:13:24,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:24,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479096342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:24,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:13:24,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-26 01:13:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793894847] [2022-11-26 01:13:24,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:24,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:24,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:13:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:13:24,432 INFO L87 Difference]: Start difference. First operand 30168 states and 41513 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:13:28,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:30,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:33,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:36,262 INFO L93 Difference]: Finished difference Result 30170 states and 41514 transitions. [2022-11-26 01:13:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:13:36,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 254 [2022-11-26 01:13:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:36,345 INFO L225 Difference]: With dead ends: 30170 [2022-11-26 01:13:36,345 INFO L226 Difference]: Without dead ends: 30159 [2022-11-26 01:13:36,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:13:36,356 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 862 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:36,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1215 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 716 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2022-11-26 01:13:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2022-11-26 01:13:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 30113. [2022-11-26 01:13:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30113 states, 19200 states have (on average 1.2463020833333334) internal successors, (23929), 19815 states have internal predecessors, (23929), 7973 states have call successors, (7973), 2935 states have call predecessors, (7973), 2939 states have return successors, (9524), 7584 states have call predecessors, (9524), 7968 states have call successors, (9524) [2022-11-26 01:13:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30113 states to 30113 states and 41426 transitions. [2022-11-26 01:13:40,476 INFO L78 Accepts]: Start accepts. Automaton has 30113 states and 41426 transitions. Word has length 254 [2022-11-26 01:13:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:40,477 INFO L495 AbstractCegarLoop]: Abstraction has 30113 states and 41426 transitions. [2022-11-26 01:13:40,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-26 01:13:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30113 states and 41426 transitions. [2022-11-26 01:13:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-11-26 01:13:40,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:40,482 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:40,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-26 01:13:40,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80a59bf5-c23e-4b58-b37b-fe23c41ff5b8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-26 01:13:40,683 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 334754646, now seen corresponding path program 1 times [2022-11-26 01:13:40,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:13:40,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849160025] [2022-11-26 01:13:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:40,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:13:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-26 01:13:41,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:13:41,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849160025] [2022-11-26 01:13:41,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849160025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:41,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:41,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:13:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231845959] [2022-11-26 01:13:41,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:41,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:13:41,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:13:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:13:41,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:13:41,307 INFO L87 Difference]: Start difference. First operand 30113 states and 41426 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-26 01:13:47,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:49,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:52,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:54,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:56,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:02,980 INFO L93 Difference]: Finished difference Result 64048 states and 90177 transitions. [2022-11-26 01:14:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:14:02,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) Word has length 261 [2022-11-26 01:14:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:03,109 INFO L225 Difference]: With dead ends: 64048 [2022-11-26 01:14:03,109 INFO L226 Difference]: Without dead ends: 37182 [2022-11-26 01:14:03,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:14:03,178 INFO L413 NwaCegarLoop]: 1222 mSDtfsCounter, 308 mSDsluCounter, 4504 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 5726 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:03,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 5726 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1034 Invalid, 3 Unknown, 0 Unchecked, 16.7s Time] [2022-11-26 01:14:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37182 states. [2022-11-26 01:14:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37182 to 29966. [2022-11-26 01:14:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29966 states, 19104 states have (on average 1.2460217755443885) internal successors, (23804), 19719 states have internal predecessors, (23804), 7927 states have call successors, (7927), 2928 states have call predecessors, (7927), 2934 states have return successors, (9474), 7540 states have call predecessors, (9474), 7922 states have call successors, (9474) [2022-11-26 01:14:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29966 states to 29966 states and 41205 transitions. [2022-11-26 01:14:07,365 INFO L78 Accepts]: Start accepts. Automaton has 29966 states and 41205 transitions. Word has length 261 [2022-11-26 01:14:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:07,365 INFO L495 AbstractCegarLoop]: Abstraction has 29966 states and 41205 transitions. [2022-11-26 01:14:07,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-26 01:14:07,366 INFO L276 IsEmpty]: Start isEmpty. Operand 29966 states and 41205 transitions. [2022-11-26 01:14:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-26 01:14:07,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:07,370 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-26 01:14:07,371 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash 904371760, now seen corresponding path program 1 times [2022-11-26 01:14:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:14:07,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655041345] [2022-11-26 01:14:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:14:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-26 01:14:08,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:14:08,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655041345] [2022-11-26 01:14:08,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655041345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:08,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:08,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:14:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630601070] [2022-11-26 01:14:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:08,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:14:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:14:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:14:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:14:08,560 INFO L87 Difference]: Start difference. First operand 29966 states and 41205 transitions. Second operand has 6 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2022-11-26 01:14:13,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:16,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:22,185 INFO L93 Difference]: Finished difference Result 30069 states and 41309 transitions. [2022-11-26 01:14:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:14:22,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) Word has length 295 [2022-11-26 01:14:22,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:22,277 INFO L225 Difference]: With dead ends: 30069 [2022-11-26 01:14:22,277 INFO L226 Difference]: Without dead ends: 30066 [2022-11-26 01:14:22,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:14:22,288 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 60 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:22,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 3049 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 614 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2022-11-26 01:14:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30066 states. [2022-11-26 01:14:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30066 to 30056. [2022-11-26 01:14:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30056 states, 19182 states have (on average 1.2455426962777605) internal successors, (23892), 19801 states have internal predecessors, (23892), 7926 states have call successors, (7926), 2936 states have call predecessors, (7926), 2947 states have return successors, (9474), 7540 states have call predecessors, (9474), 7922 states have call successors, (9474) [2022-11-26 01:14:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30056 states to 30056 states and 41292 transitions. [2022-11-26 01:14:25,877 INFO L78 Accepts]: Start accepts. Automaton has 30056 states and 41292 transitions. Word has length 295 [2022-11-26 01:14:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:25,878 INFO L495 AbstractCegarLoop]: Abstraction has 30056 states and 41292 transitions. [2022-11-26 01:14:25,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (43), 2 states have call predecessors, (43), 1 states have call successors, (43) [2022-11-26 01:14:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 30056 states and 41292 transitions. [2022-11-26 01:14:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-11-26 01:14:25,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:25,884 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-26 01:14:25,884 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -187400765, now seen corresponding path program 1 times [2022-11-26 01:14:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:14:25,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800725782] [2022-11-26 01:14:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:14:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-26 01:14:26,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:14:26,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800725782] [2022-11-26 01:14:26,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800725782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:26,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:26,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:14:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961257538] [2022-11-26 01:14:26,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:26,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:14:26,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:14:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:14:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:14:26,497 INFO L87 Difference]: Start difference. First operand 30056 states and 41292 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-26 01:14:30,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:32,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:36,872 INFO L93 Difference]: Finished difference Result 59971 states and 82841 transitions. [2022-11-26 01:14:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:14:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 327 [2022-11-26 01:14:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:36,969 INFO L225 Difference]: With dead ends: 59971 [2022-11-26 01:14:36,970 INFO L226 Difference]: Without dead ends: 29916 [2022-11-26 01:14:37,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:14:37,047 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 15 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:37,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1535 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-26 01:14:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29916 states. [2022-11-26 01:14:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29916 to 29916. [2022-11-26 01:14:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29916 states, 19112 states have (on average 1.2427794056090415) internal successors, (23752), 19731 states have internal predecessors, (23752), 7856 states have call successors, (7856), 2936 states have call predecessors, (7856), 2947 states have return successors, (9404), 7470 states have call predecessors, (9404), 7852 states have call successors, (9404) [2022-11-26 01:14:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29916 states to 29916 states and 41012 transitions. [2022-11-26 01:14:40,979 INFO L78 Accepts]: Start accepts. Automaton has 29916 states and 41012 transitions. Word has length 327 [2022-11-26 01:14:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:40,979 INFO L495 AbstractCegarLoop]: Abstraction has 29916 states and 41012 transitions. [2022-11-26 01:14:40,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-26 01:14:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 29916 states and 41012 transitions. [2022-11-26 01:14:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-26 01:14:40,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:40,989 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:14:40,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-26 01:14:40,989 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:40,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1412038054, now seen corresponding path program 1 times [2022-11-26 01:14:40,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:14:40,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124355666] [2022-11-26 01:14:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:40,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:14:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-26 01:14:41,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:14:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124355666] [2022-11-26 01:14:41,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124355666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:41,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:14:41,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:14:41,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230130201] [2022-11-26 01:14:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:41,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:14:41,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:14:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:14:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:14:41,652 INFO L87 Difference]: Start difference. First operand 29916 states and 41012 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-26 01:14:45,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:48,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:14:49,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []