./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/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_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS --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-8393723 [2022-11-19 07:26:00,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:26:00,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:26:00,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:26:00,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:26:00,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:26:00,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:26:00,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:26:00,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:26:00,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:26:00,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:26:00,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:26:00,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:26:00,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:26:00,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:26:00,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:26:00,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:26:00,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:26:00,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:26:00,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:26:00,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:26:00,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:26:00,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:26:00,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:26:00,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:26:00,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:26:00,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:26:00,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:26:00,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:26:00,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:26:00,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:26:00,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:26:00,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:26:00,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:26:00,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:26:00,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:26:00,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:26:00,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:26:00,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:26:00,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:26:00,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:26:00,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:26:00,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:26:00,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:26:00,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:26:00,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:26:00,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:26:00,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:26:00,642 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:26:00,643 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:26:00,643 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:26:00,643 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:26:00,643 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:26:00,643 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:26:00,644 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:26:00,644 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:26:00,644 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:26:00,644 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:26:00,645 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:26:00,645 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:26:00,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:26:00,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:26:00,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:26:00,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:26:00,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:26:00,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:26:00,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:26:00,647 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:26:00,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:26:00,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:26:00,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:26:00,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:00,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:26:00,648 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:26:00,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:26:00,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:26:00,649 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:26:00,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:26:00,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:26:00,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:26:00,650 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_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2022-11-19 07:26:00,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:26:00,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:26:00,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:26:00,915 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:26:00,916 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:26:00,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-19 07:26:00,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/data/88758c807/263c806fd4de4237876770de13d19b71/FLAGece7336fa [2022-11-19 07:26:01,790 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:26:01,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-19 07:26:01,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/data/88758c807/263c806fd4de4237876770de13d19b71/FLAGece7336fa [2022-11-19 07:26:02,293 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/data/88758c807/263c806fd4de4237876770de13d19b71 [2022-11-19 07:26:02,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:26:02,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:26:02,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:02,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:26:02,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:26:02,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:02" (1/1) ... [2022-11-19 07:26:02,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da4de2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:02, skipping insertion in model container [2022-11-19 07:26:02,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:02" (1/1) ... [2022-11-19 07:26:02,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:26:02,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:26:04,110 WARN L234 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_a2505eed-3f53-4fba-9d84-7afd68d27378/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] [2022-11-19 07:26:04,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:04,230 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:26:04,650 WARN L234 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_a2505eed-3f53-4fba-9d84-7afd68d27378/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] [2022-11-19 07:26:04,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:04,748 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:26:04,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04 WrapperNode [2022-11-19 07:26:04,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:04,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:04,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:26:04,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:26:04,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:04,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:04,985 INFO L138 Inliner]: procedures = 216, calls = 1432, calls flagged for inlining = 108, calls inlined = 97, statements flattened = 3123 [2022-11-19 07:26:04,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:04,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:26:04,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:26:04,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:26:04,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:04,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,137 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:26:05,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:26:05,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:26:05,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:26:05,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (1/1) ... [2022-11-19 07:26:05,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:05,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:05,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:26:05,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:26:05,339 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-19 07:26:05,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-19 07:26:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_free_iso_urbs [2022-11-19 07:26:05,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_free_iso_urbs [2022-11-19 07:26:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-19 07:26:05,340 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-19 07:26:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:26:05,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:26:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2022-11-19 07:26:05,341 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2022-11-19 07:26:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2022-11-19 07:26:05,341 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2022-11-19 07:26:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:26:05,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:26:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2022-11-19 07:26:05,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2022-11-19 07:26:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2022-11-19 07:26:05,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2022-11-19 07:26:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 07:26:05,343 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 07:26:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:26:05,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:26:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2022-11-19 07:26:05,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2022-11-19 07:26:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2022-11-19 07:26:05,344 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2022-11-19 07:26:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 07:26:05,344 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 07:26:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:26:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2022-11-19 07:26:05,345 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2022-11-19 07:26:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 07:26:05,346 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 07:26:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:26:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 07:26:05,346 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 07:26:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-19 07:26:05,346 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-19 07:26:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:26:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:26:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-19 07:26:05,347 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-19 07:26:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-19 07:26:05,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-19 07:26:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 07:26:05,348 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 07:26:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:26:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:26:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-19 07:26:05,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-19 07:26:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-19 07:26:05,351 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-19 07:26:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-19 07:26:05,352 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-19 07:26:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_model [2022-11-19 07:26:05,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_model [2022-11-19 07:26:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2022-11-19 07:26:05,353 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2022-11-19 07:26:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2022-11-19 07:26:05,354 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2022-11-19 07:26:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_stop_iso_xfer [2022-11-19 07:26:05,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_stop_iso_xfer [2022-11-19 07:26:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-19 07:26:05,354 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-19 07:26:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_filter_pes2ts_init [2022-11-19 07:26:05,355 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_filter_pes2ts_init [2022-11-19 07:26:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:26:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 07:26:05,355 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 07:26:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 07:26:05,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 07:26:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:26:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2022-11-19 07:26:05,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2022-11-19 07:26:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-19 07:26:05,357 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-19 07:26:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:26:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:26:05,357 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:26:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-19 07:26:05,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-19 07:26:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-19 07:26:05,358 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-19 07:26:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:26:05,359 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:26:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-19 07:26:05,359 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-19 07:26:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_send_command [2022-11-19 07:26:05,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_send_command [2022-11-19 07:26:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:26:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_setup_urbs [2022-11-19 07:26:05,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_setup_urbs [2022-11-19 07:26:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2022-11-19 07:26:05,362 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2022-11-19 07:26:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:26:05,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:26:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_pids [2022-11-19 07:26:05,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_pids [2022-11-19 07:26:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_usb [2022-11-19 07:26:05,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_usb [2022-11-19 07:26:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:26:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:26:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:26:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2022-11-19 07:26:05,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2022-11-19 07:26:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:26:05,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:26:05,365 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-19 07:26:05,365 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-19 07:26:05,366 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2022-11-19 07:26:05,366 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2022-11-19 07:26:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:26:05,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:26:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:26:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:26:05,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:26:06,187 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:26:06,190 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:26:11,867 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:26:12,839 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:26:12,840 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:26:12,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:12 BoogieIcfgContainer [2022-11-19 07:26:12,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:26:12,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:26:12,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:26:12,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:26:12,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:26:02" (1/3) ... [2022-11-19 07:26:12,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148191ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:12, skipping insertion in model container [2022-11-19 07:26:12,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:04" (2/3) ... [2022-11-19 07:26:12,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148191ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:12, skipping insertion in model container [2022-11-19 07:26:12,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:12" (3/3) ... [2022-11-19 07:26:12,853 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2022-11-19 07:26:12,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:26:12,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:26:12,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:26:12,944 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;@2eb04ab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:26:12,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:26:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 670 states, 414 states have (on average 1.3357487922705313) internal successors, (553), 434 states have internal predecessors, (553), 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) [2022-11-19 07:26:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:26:12,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:12,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:12,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1669089572, now seen corresponding path program 1 times [2022-11-19 07:26:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975553152] [2022-11-19 07:26:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:12,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:13,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975553152] [2022-11-19 07:26:13,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975553152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:13,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:13,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:26:13,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032037471] [2022-11-19 07:26:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:13,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:13,652 INFO L87 Difference]: Start difference. First operand has 670 states, 414 states have (on average 1.3357487922705313) internal successors, (553), 434 states have internal predecessors, (553), 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) [2022-11-19 07:26:15,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:20,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:20,943 INFO L93 Difference]: Finished difference Result 1926 states and 2808 transitions. [2022-11-19 07:26:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:20,949 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 [2022-11-19 07:26:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:20,977 INFO L225 Difference]: With dead ends: 1926 [2022-11-19 07:26:20,977 INFO L226 Difference]: Without dead ends: 1253 [2022-11-19 07:26:20,992 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 [2022-11-19 07:26:20,996 INFO L413 NwaCegarLoop]: 989 mSDtfsCounter, 850 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:20,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 1769 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 310 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 07:26:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2022-11-19 07:26:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1249. [2022-11-19 07:26:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 776 states have (on average 1.3260309278350515) internal successors, (1029), 805 states have internal predecessors, (1029), 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) [2022-11-19 07:26:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1780 transitions. [2022-11-19 07:26:21,204 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1780 transitions. Word has length 7 [2022-11-19 07:26:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:21,205 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1780 transitions. [2022-11-19 07:26:21,206 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) [2022-11-19 07:26:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1780 transitions. [2022-11-19 07:26:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:26:21,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:21,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:21,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:26:21,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -202573893, now seen corresponding path program 1 times [2022-11-19 07:26:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:21,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421165501] [2022-11-19 07:26:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:21,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421165501] [2022-11-19 07:26:21,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421165501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:21,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:21,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:26:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60482101] [2022-11-19 07:26:21,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:21,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:21,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:21,378 INFO L87 Difference]: Start difference. First operand 1249 states and 1780 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) [2022-11-19 07:26:23,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:26,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:28,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:29,494 INFO L93 Difference]: Finished difference Result 2457 states and 3496 transitions. [2022-11-19 07:26:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:29,497 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 [2022-11-19 07:26:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:29,511 INFO L225 Difference]: With dead ends: 2457 [2022-11-19 07:26:29,511 INFO L226 Difference]: Without dead ends: 2454 [2022-11-19 07:26:29,513 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 [2022-11-19 07:26:29,514 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 884 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1778 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-19 07:26:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-11-19 07:26:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2447. [2022-11-19 07:26:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 1524 states have (on average 1.3267716535433072) internal successors, (2022), 1576 states have internal predecessors, (2022), 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) [2022-11-19 07:26:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3487 transitions. [2022-11-19 07:26:29,643 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3487 transitions. Word has length 8 [2022-11-19 07:26:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:29,643 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3487 transitions. [2022-11-19 07:26:29,644 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) [2022-11-19 07:26:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3487 transitions. [2022-11-19 07:26:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:26:29,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:29,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:29,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:26:29,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1985223233, now seen corresponding path program 1 times [2022-11-19 07:26:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:29,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783379364] [2022-11-19 07:26:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:29,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:29,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783379364] [2022-11-19 07:26:29,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783379364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:29,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:29,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:26:29,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144150580] [2022-11-19 07:26:29,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:29,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:29,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:29,762 INFO L87 Difference]: Start difference. First operand 2447 states and 3487 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) [2022-11-19 07:26:31,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:33,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:36,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:37,323 INFO L93 Difference]: Finished difference Result 2458 states and 3497 transitions. [2022-11-19 07:26:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:37,325 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 [2022-11-19 07:26:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:37,340 INFO L225 Difference]: With dead ends: 2458 [2022-11-19 07:26:37,340 INFO L226 Difference]: Without dead ends: 2455 [2022-11-19 07:26:37,342 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 [2022-11-19 07:26:37,343 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 881 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:37,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1781 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 298 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 07:26:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-11-19 07:26:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2448. [2022-11-19 07:26:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 1525 states have (on average 1.3265573770491803) internal successors, (2023), 1577 states have internal predecessors, (2023), 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) [2022-11-19 07:26:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3488 transitions. [2022-11-19 07:26:37,514 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3488 transitions. Word has length 9 [2022-11-19 07:26:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:37,515 INFO L495 AbstractCegarLoop]: Abstraction has 2448 states and 3488 transitions. [2022-11-19 07:26:37,515 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) [2022-11-19 07:26:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3488 transitions. [2022-11-19 07:26:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:26:37,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:37,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:37,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:26:37,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1412773058, now seen corresponding path program 1 times [2022-11-19 07:26:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711511640] [2022-11-19 07:26:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:37,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:37,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711511640] [2022-11-19 07:26:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711511640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:37,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:37,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:26:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173385653] [2022-11-19 07:26:37,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:37,674 INFO L87 Difference]: Start difference. First operand 2448 states and 3488 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) [2022-11-19 07:26:39,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:41,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:44,962 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 [] [2022-11-19 07:26:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:45,455 INFO L93 Difference]: Finished difference Result 4700 states and 6775 transitions. [2022-11-19 07:26:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:45,457 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 [2022-11-19 07:26:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:45,483 INFO L225 Difference]: With dead ends: 4700 [2022-11-19 07:26:45,483 INFO L226 Difference]: Without dead ends: 4691 [2022-11-19 07:26:45,487 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 [2022-11-19 07:26:45,491 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 872 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:45,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1809 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2022-11-19 07:26:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-11-19 07:26:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4684. [2022-11-19 07:26:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 2917 states have (on average 1.3239629756599245) internal successors, (3862), 3013 states have internal predecessors, (3862), 1388 states have call successors, (1388), 383 states have call predecessors, (1388), 378 states have return successors, (1503), 1327 states have call predecessors, (1503), 1380 states have call successors, (1503) [2022-11-19 07:26:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 6753 transitions. [2022-11-19 07:26:45,754 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 6753 transitions. Word has length 10 [2022-11-19 07:26:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:45,754 INFO L495 AbstractCegarLoop]: Abstraction has 4684 states and 6753 transitions. [2022-11-19 07:26:45,755 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) [2022-11-19 07:26:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 6753 transitions. [2022-11-19 07:26:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 07:26:45,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:45,769 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] [2022-11-19 07:26:45,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:26:45,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1399916511, now seen corresponding path program 1 times [2022-11-19 07:26:45,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:45,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97885379] [2022-11-19 07:26:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:26:46,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:46,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97885379] [2022-11-19 07:26:46,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97885379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:46,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:46,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:26:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084235064] [2022-11-19 07:26:46,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:46,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:46,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:46,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:46,208 INFO L87 Difference]: Start difference. First operand 4684 states and 6753 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) [2022-11-19 07:26:48,427 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 [] [2022-11-19 07:26:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:50,726 INFO L93 Difference]: Finished difference Result 9415 states and 13592 transitions. [2022-11-19 07:26:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:50,730 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 [2022-11-19 07:26:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:50,758 INFO L225 Difference]: With dead ends: 9415 [2022-11-19 07:26:50,758 INFO L226 Difference]: Without dead ends: 4732 [2022-11-19 07:26:50,778 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 [2022-11-19 07:26:50,778 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 230 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:50,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1320 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-19 07:26:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2022-11-19 07:26:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4732. [2022-11-19 07:26:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 2965 states have (on average 1.3264755480607082) internal successors, (3933), 3061 states have internal predecessors, (3933), 1388 states have call successors, (1388), 383 states have call predecessors, (1388), 378 states have return successors, (1503), 1327 states have call predecessors, (1503), 1380 states have call successors, (1503) [2022-11-19 07:26:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 6824 transitions. [2022-11-19 07:26:51,104 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 6824 transitions. Word has length 84 [2022-11-19 07:26:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:51,109 INFO L495 AbstractCegarLoop]: Abstraction has 4732 states and 6824 transitions. [2022-11-19 07:26:51,110 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) [2022-11-19 07:26:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 6824 transitions. [2022-11-19 07:26:51,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 07:26:51,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:51,115 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] [2022-11-19 07:26:51,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:26:51,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1120987681, now seen corresponding path program 1 times [2022-11-19 07:26:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:51,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584923835] [2022-11-19 07:26:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:26:51,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584923835] [2022-11-19 07:26:51,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584923835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:51,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:51,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:26:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949463516] [2022-11-19 07:26:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:51,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:51,465 INFO L87 Difference]: Start difference. First operand 4732 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:26:53,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:56,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:58,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:58,817 INFO L93 Difference]: Finished difference Result 11616 states and 16713 transitions. [2022-11-19 07:26:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:58,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-11-19 07:26:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:58,860 INFO L225 Difference]: With dead ends: 11616 [2022-11-19 07:26:58,860 INFO L226 Difference]: Without dead ends: 6885 [2022-11-19 07:26:58,883 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 [2022-11-19 07:26:58,883 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 823 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:58,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 1777 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 07:26:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2022-11-19 07:26:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6862. [2022-11-19 07:26:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 4290 states have (on average 1.3202797202797203) internal successors, (5664), 4432 states have internal predecessors, (5664), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-19 07:26:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 9839 transitions. [2022-11-19 07:26:59,406 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 9839 transitions. Word has length 96 [2022-11-19 07:26:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:59,408 INFO L495 AbstractCegarLoop]: Abstraction has 6862 states and 9839 transitions. [2022-11-19 07:26:59,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:26:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 9839 transitions. [2022-11-19 07:26:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 07:26:59,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:59,412 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] [2022-11-19 07:26:59,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:26:59,413 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1105602241, now seen corresponding path program 1 times [2022-11-19 07:26:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:59,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709914032] [2022-11-19 07:26:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:59,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:27:00,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709914032] [2022-11-19 07:27:00,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709914032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:00,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:00,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:27:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081903230] [2022-11-19 07:27:00,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:00,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:27:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:27:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:00,129 INFO L87 Difference]: Start difference. First operand 6862 states and 9839 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) [2022-11-19 07:27:02,431 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 [] [2022-11-19 07:27:07,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:09,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:10,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:12,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:15,897 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 [] [2022-11-19 07:27:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:15,949 INFO L93 Difference]: Finished difference Result 17587 states and 26385 transitions. [2022-11-19 07:27:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:27:15,950 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 [2022-11-19 07:27:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:16,017 INFO L225 Difference]: With dead ends: 17587 [2022-11-19 07:27:16,017 INFO L226 Difference]: Without dead ends: 10726 [2022-11-19 07:27:16,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:27:16,050 INFO L413 NwaCegarLoop]: 1065 mSDtfsCounter, 718 mSDsluCounter, 2846 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 216 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 3911 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:16,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 3911 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 719 Invalid, 3 Unknown, 0 Unchecked, 15.1s Time] [2022-11-19 07:27:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10726 states. [2022-11-19 07:27:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10726 to 6898. [2022-11-19 07:27:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6898 states, 4326 states have (on average 1.317614424410541) internal successors, (5700), 4468 states have internal predecessors, (5700), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-19 07:27:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6898 states to 6898 states and 9875 transitions. [2022-11-19 07:27:16,719 INFO L78 Accepts]: Start accepts. Automaton has 6898 states and 9875 transitions. Word has length 98 [2022-11-19 07:27:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:16,720 INFO L495 AbstractCegarLoop]: Abstraction has 6898 states and 9875 transitions. [2022-11-19 07:27:16,721 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) [2022-11-19 07:27:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6898 states and 9875 transitions. [2022-11-19 07:27:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 07:27:16,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:16,730 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] [2022-11-19 07:27:16,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:27:16,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:16,731 INFO L85 PathProgramCache]: Analyzing trace with hash -280952461, now seen corresponding path program 1 times [2022-11-19 07:27:16,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:16,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955174285] [2022-11-19 07:27:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:16,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:27:17,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:17,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955174285] [2022-11-19 07:27:17,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955174285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:17,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:17,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:27:17,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699319080] [2022-11-19 07:27:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:17,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:17,093 INFO L87 Difference]: Start difference. First operand 6898 states and 9875 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) [2022-11-19 07:27:19,301 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 [] [2022-11-19 07:27:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:24,187 INFO L93 Difference]: Finished difference Result 15292 states and 22285 transitions. [2022-11-19 07:27:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:24,192 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 [2022-11-19 07:27:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:24,229 INFO L225 Difference]: With dead ends: 15292 [2022-11-19 07:27:24,229 INFO L226 Difference]: Without dead ends: 8395 [2022-11-19 07:27:24,258 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 [2022-11-19 07:27:24,258 INFO L413 NwaCegarLoop]: 969 mSDtfsCounter, 119 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:24,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1813 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 07:27:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8395 states. [2022-11-19 07:27:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8395 to 6910. [2022-11-19 07:27:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6910 states, 4338 states have (on average 1.3167358229598893) internal successors, (5712), 4480 states have internal predecessors, (5712), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-19 07:27:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6910 states to 6910 states and 9887 transitions. [2022-11-19 07:27:24,915 INFO L78 Accepts]: Start accepts. Automaton has 6910 states and 9887 transitions. Word has length 105 [2022-11-19 07:27:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:24,918 INFO L495 AbstractCegarLoop]: Abstraction has 6910 states and 9887 transitions. [2022-11-19 07:27:24,918 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) [2022-11-19 07:27:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6910 states and 9887 transitions. [2022-11-19 07:27:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 07:27:24,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:24,922 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] [2022-11-19 07:27:24,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:27:24,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash -118576304, now seen corresponding path program 1 times [2022-11-19 07:27:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:24,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332861927] [2022-11-19 07:27:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:24,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:27:25,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:25,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332861927] [2022-11-19 07:27:25,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332861927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:25,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:25,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:27:25,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222998912] [2022-11-19 07:27:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:25,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:27:25,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:27:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:27:25,260 INFO L87 Difference]: Start difference. First operand 6910 states and 9887 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) [2022-11-19 07:27:29,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:31,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:33,516 INFO L93 Difference]: Finished difference Result 13893 states and 19870 transitions. [2022-11-19 07:27:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:27:33,517 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 [2022-11-19 07:27:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:33,545 INFO L225 Difference]: With dead ends: 13893 [2022-11-19 07:27:33,546 INFO L226 Difference]: Without dead ends: 6982 [2022-11-19 07:27:33,564 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 [2022-11-19 07:27:33,565 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 21 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:33,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2414 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 449 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2022-11-19 07:27:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2022-11-19 07:27:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6924. [2022-11-19 07:27:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6924 states, 4352 states have (on average 1.3154871323529411) internal successors, (5725), 4494 states have internal predecessors, (5725), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-19 07:27:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6924 states to 6924 states and 9900 transitions. [2022-11-19 07:27:33,983 INFO L78 Accepts]: Start accepts. Automaton has 6924 states and 9900 transitions. Word has length 103 [2022-11-19 07:27:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:33,983 INFO L495 AbstractCegarLoop]: Abstraction has 6924 states and 9900 transitions. [2022-11-19 07:27:33,984 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) [2022-11-19 07:27:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6924 states and 9900 transitions. [2022-11-19 07:27:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:27:33,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:33,986 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] [2022-11-19 07:27:33,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:27:33,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:33,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash 35758447, now seen corresponding path program 1 times [2022-11-19 07:27:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:33,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128454424] [2022-11-19 07:27:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:33,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:27:34,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:34,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128454424] [2022-11-19 07:27:34,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128454424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:34,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101836406] [2022-11-19 07:27:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:34,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:34,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:34,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:27:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:35,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:27:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:27:35,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101836406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:35,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:35,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:27:35,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429931317] [2022-11-19 07:27:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:35,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:35,479 INFO L87 Difference]: Start difference. First operand 6924 states and 9900 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) [2022-11-19 07:27:39,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:42,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:42,511 INFO L93 Difference]: Finished difference Result 13871 states and 19879 transitions. [2022-11-19 07:27:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:42,512 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 [2022-11-19 07:27:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:42,543 INFO L225 Difference]: With dead ends: 13871 [2022-11-19 07:27:42,543 INFO L226 Difference]: Without dead ends: 6948 [2022-11-19 07:27:42,567 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 [2022-11-19 07:27:42,568 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 2 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:42,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1596 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-19 07:27:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2022-11-19 07:27:42,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 6936. [2022-11-19 07:27:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 4364 states have (on average 1.3146196150320806) internal successors, (5737), 4506 states have internal predecessors, (5737), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-19 07:27:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 9912 transitions. [2022-11-19 07:27:43,159 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 9912 transitions. Word has length 115 [2022-11-19 07:27:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:43,160 INFO L495 AbstractCegarLoop]: Abstraction has 6936 states and 9912 transitions. [2022-11-19 07:27:43,160 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) [2022-11-19 07:27:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 9912 transitions. [2022-11-19 07:27:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:27:43,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:43,163 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] [2022-11-19 07:27:43,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:43,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:43,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1168222698, now seen corresponding path program 1 times [2022-11-19 07:27:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:43,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218848202] [2022-11-19 07:27:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:27:43,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:43,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218848202] [2022-11-19 07:27:43,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218848202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:43,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152089420] [2022-11-19 07:27:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:43,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:43,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:43,768 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:43,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:27:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:44,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2323 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:27:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:27:44,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:44,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152089420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:44,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:44,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:27:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461188482] [2022-11-19 07:27:44,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:44,797 INFO L87 Difference]: Start difference. First operand 6936 states and 9912 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) [2022-11-19 07:27:48,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:50,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:52,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:27:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:52,661 INFO L93 Difference]: Finished difference Result 13883 states and 19879 transitions. [2022-11-19 07:27:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:52,661 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 [2022-11-19 07:27:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:52,693 INFO L225 Difference]: With dead ends: 13883 [2022-11-19 07:27:52,693 INFO L226 Difference]: Without dead ends: 6948 [2022-11-19 07:27:52,717 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 [2022-11-19 07:27:52,718 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 0 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:52,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1597 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-19 07:27:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2022-11-19 07:27:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 6948. [2022-11-19 07:27:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6948 states, 4376 states have (on average 1.3137568555758683) internal successors, (5749), 4518 states have internal predecessors, (5749), 2004 states have call successors, (2004), 574 states have call predecessors, (2004), 567 states have return successors, (2171), 1915 states have call predecessors, (2171), 1996 states have call successors, (2171) [2022-11-19 07:27:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6948 states to 6948 states and 9924 transitions. [2022-11-19 07:27:53,349 INFO L78 Accepts]: Start accepts. Automaton has 6948 states and 9924 transitions. Word has length 117 [2022-11-19 07:27:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:53,350 INFO L495 AbstractCegarLoop]: Abstraction has 6948 states and 9924 transitions. [2022-11-19 07:27:53,350 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) [2022-11-19 07:27:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6948 states and 9924 transitions. [2022-11-19 07:27:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-19 07:27:53,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:53,353 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] [2022-11-19 07:27:53,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:53,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:27:53,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2144935218, now seen corresponding path program 1 times [2022-11-19 07:27:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41257762] [2022-11-19 07:27:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:53,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:27:53,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41257762] [2022-11-19 07:27:53,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41257762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924454227] [2022-11-19 07:27:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:53,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:53,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:53,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:54,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:27:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:55,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 2350 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:27:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:27:55,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:27:55,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924454227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696091389] [2022-11-19 07:27:55,337 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2022-11-19 07:27:55,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:55,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:55,347 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:55,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:01,918 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 [2022-11-19 07:28:01,931 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 [2022-11-19 07:28:08,633 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:28:08,634 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 [2022-11-19 07:28:08,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:08,709 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-19 07:28:08,710 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 [2022-11-19 07:28:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:08,805 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-19 07:28:08,806 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 [2022-11-19 07:28:08,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,153 INFO L217 Elim1Store]: Index analysis took 218 ms [2022-11-19 07:28:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:10,476 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-19 07:28:10,478 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 [2022-11-19 07:28:11,440 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:28:11,441 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 [2022-11-19 07:28:13,300 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 [2022-11-19 07:28:13,368 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-19 07:28:13,369 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 [2022-11-19 07:28:13,391 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 [2022-11-19 07:28:13,942 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 [2022-11-19 07:28:14,038 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-19 07:28:14,039 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 [2022-11-19 07:28:14,063 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 [2022-11-19 07:28:14,872 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 [2022-11-19 07:28:14,889 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 [2022-11-19 07:28:14,915 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 [2022-11-19 07:28:15,304 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 [2022-11-19 07:28:15,366 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-19 07:28:15,366 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 [2022-11-19 07:28:15,388 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 [2022-11-19 07:28:16,045 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-19 07:28:16,046 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 [2022-11-19 07:28:16,069 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 [2022-11-19 07:28:16,088 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 [2022-11-19 07:28:17,976 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:336) 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) [2022-11-19 07:28:17,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:17,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:28:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013337506] [2022-11-19 07:28:17,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:28:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:28:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:28:17,986 INFO L87 Difference]: Start difference. First operand 6948 states and 9924 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) [2022-11-19 07:28:20,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:26,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:27,666 INFO L93 Difference]: Finished difference Result 19851 states and 29907 transitions. [2022-11-19 07:28:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:28:27,666 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 [2022-11-19 07:28:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:27,727 INFO L225 Difference]: With dead ends: 19851 [2022-11-19 07:28:27,727 INFO L226 Difference]: Without dead ends: 12904 [2022-11-19 07:28:27,760 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 [2022-11-19 07:28:27,761 INFO L413 NwaCegarLoop]: 1105 mSDtfsCounter, 588 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 3946 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:27,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 3946 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1013 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2022-11-19 07:28:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2022-11-19 07:28:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 7092. [2022-11-19 07:28:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7092 states, 4484 states have (on average 1.314228367528992) internal successors, (5893), 4626 states have internal predecessors, (5893), 2040 states have call successors, (2040), 574 states have call predecessors, (2040), 567 states have return successors, (2207), 1951 states have call predecessors, (2207), 2032 states have call successors, (2207) [2022-11-19 07:28:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7092 states to 7092 states and 10140 transitions. [2022-11-19 07:28:28,541 INFO L78 Accepts]: Start accepts. Automaton has 7092 states and 10140 transitions. Word has length 118 [2022-11-19 07:28:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:28,542 INFO L495 AbstractCegarLoop]: Abstraction has 7092 states and 10140 transitions. [2022-11-19 07:28:28,543 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) [2022-11-19 07:28:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7092 states and 10140 transitions. [2022-11-19 07:28:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-19 07:28:28,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:28,546 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] [2022-11-19 07:28:28,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:28,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:28:28,759 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1726035266, now seen corresponding path program 2 times [2022-11-19 07:28:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167317446] [2022-11-19 07:28:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:28,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-19 07:28:29,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167317446] [2022-11-19 07:28:29,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167317446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:29,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438160170] [2022-11-19 07:28:29,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:29,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:29,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:29,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:29,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:28:30,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:28:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:28:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 07:28:30,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:30,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438160170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:30,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:30,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 07:28:30,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096449998] [2022-11-19 07:28:30,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:28:30,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:28:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:28:30,269 INFO L87 Difference]: Start difference. First operand 7092 states and 10140 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) [2022-11-19 07:28:32,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:36,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:38,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:40,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:40,789 INFO L93 Difference]: Finished difference Result 7142 states and 10234 transitions. [2022-11-19 07:28:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:28:40,790 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 [2022-11-19 07:28:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:40,824 INFO L225 Difference]: With dead ends: 7142 [2022-11-19 07:28:40,824 INFO L226 Difference]: Without dead ends: 7139 [2022-11-19 07:28:40,829 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 [2022-11-19 07:28:40,830 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 51 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:40,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2317 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 492 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2022-11-19 07:28:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2022-11-19 07:28:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 7139. [2022-11-19 07:28:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7139 states, 4514 states have (on average 1.31346920691183) internal successors, (5929), 4661 states have internal predecessors, (5929), 2039 states have call successors, (2039), 586 states have call predecessors, (2039), 585 states have return successors, (2258), 1951 states have call predecessors, (2258), 2032 states have call successors, (2258) [2022-11-19 07:28:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7139 states to 7139 states and 10226 transitions. [2022-11-19 07:28:41,588 INFO L78 Accepts]: Start accepts. Automaton has 7139 states and 10226 transitions. Word has length 148 [2022-11-19 07:28:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:41,589 INFO L495 AbstractCegarLoop]: Abstraction has 7139 states and 10226 transitions. [2022-11-19 07:28:41,589 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) [2022-11-19 07:28:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7139 states and 10226 transitions. [2022-11-19 07:28:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-19 07:28:41,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:41,594 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] [2022-11-19 07:28:41,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:41,805 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash -403749983, now seen corresponding path program 1 times [2022-11-19 07:28:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:41,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089147949] [2022-11-19 07:28:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 07:28:42,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:42,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089147949] [2022-11-19 07:28:42,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089147949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:42,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:28:42,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:28:42,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384952329] [2022-11-19 07:28:42,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:42,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:28:42,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:28:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:28:42,155 INFO L87 Difference]: Start difference. First operand 7139 states and 10226 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 07:28:44,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:48,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:48,804 INFO L93 Difference]: Finished difference Result 14313 states and 20535 transitions. [2022-11-19 07:28:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:28:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 155 [2022-11-19 07:28:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:48,829 INFO L225 Difference]: With dead ends: 14313 [2022-11-19 07:28:48,829 INFO L226 Difference]: Without dead ends: 7175 [2022-11-19 07:28:48,854 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 [2022-11-19 07:28:48,854 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 1 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:48,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1592 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-19 07:28:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2022-11-19 07:28:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 7151. [2022-11-19 07:28:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 4526 states have (on average 1.3126380910296067) internal successors, (5941), 4673 states have internal predecessors, (5941), 2039 states have call successors, (2039), 586 states have call predecessors, (2039), 585 states have return successors, (2258), 1951 states have call predecessors, (2258), 2032 states have call successors, (2258) [2022-11-19 07:28:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 10238 transitions. [2022-11-19 07:28:49,348 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 10238 transitions. Word has length 155 [2022-11-19 07:28:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:49,349 INFO L495 AbstractCegarLoop]: Abstraction has 7151 states and 10238 transitions. [2022-11-19 07:28:49,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 07:28:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 10238 transitions. [2022-11-19 07:28:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-19 07:28:49,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:49,353 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] [2022-11-19 07:28:49,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:28:49,354 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:49,354 INFO L85 PathProgramCache]: Analyzing trace with hash -893843566, now seen corresponding path program 1 times [2022-11-19 07:28:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:49,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789479455] [2022-11-19 07:28:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:49,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 07:28:49,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:49,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789479455] [2022-11-19 07:28:49,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789479455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:49,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965984318] [2022-11-19 07:28:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:49,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:49,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:49,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:28:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:28:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:28:50,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:50,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965984318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:50,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:50,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:28:50,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941983721] [2022-11-19 07:28:50,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:50,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:28:50,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:50,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:28:50,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:28:50,907 INFO L87 Difference]: Start difference. First operand 7151 states and 10238 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, (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) [2022-11-19 07:28:54,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:56,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:28:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:57,244 INFO L93 Difference]: Finished difference Result 14337 states and 20583 transitions. [2022-11-19 07:28:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:28:57,244 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, (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 160 [2022-11-19 07:28:57,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:57,269 INFO L225 Difference]: With dead ends: 14337 [2022-11-19 07:28:57,269 INFO L226 Difference]: Without dead ends: 7187 [2022-11-19 07:28:57,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:28:57,292 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 1 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:57,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1592 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 296 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-11-19 07:28:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2022-11-19 07:28:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 7163. [2022-11-19 07:28:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7163 states, 4538 states have (on average 1.3118113706478625) internal successors, (5953), 4685 states have internal predecessors, (5953), 2039 states have call successors, (2039), 586 states have call predecessors, (2039), 585 states have return successors, (2258), 1951 states have call predecessors, (2258), 2032 states have call successors, (2258) [2022-11-19 07:28:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7163 states to 7163 states and 10250 transitions. [2022-11-19 07:28:57,869 INFO L78 Accepts]: Start accepts. Automaton has 7163 states and 10250 transitions. Word has length 160 [2022-11-19 07:28:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:57,870 INFO L495 AbstractCegarLoop]: Abstraction has 7163 states and 10250 transitions. [2022-11-19 07:28:57,870 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, (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) [2022-11-19 07:28:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7163 states and 10250 transitions. [2022-11-19 07:28:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-19 07:28:57,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:57,874 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] [2022-11-19 07:28:57,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:58,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:28:58,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1934554225, now seen corresponding path program 1 times [2022-11-19 07:28:58,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:58,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791966179] [2022-11-19 07:28:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:58,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:28:58,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791966179] [2022-11-19 07:28:58,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791966179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863549897] [2022-11-19 07:28:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:58,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:58,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:58,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:58,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:28:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2422 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:28:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:28:59,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:28:59,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863549897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328765965] [2022-11-19 07:28:59,872 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-11-19 07:28:59,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:59,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:59,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:59,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:05,506 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 [2022-11-19 07:29:05,516 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 [2022-11-19 07:29:21,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:21,636 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-19 07:29:21,637 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 [2022-11-19 07:29:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:21,880 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-19 07:29:21,881 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 [2022-11-19 07:29:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,359 INFO L217 Elim1Store]: Index analysis took 226 ms [2022-11-19 07:29:22,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:23,611 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-19 07:29:23,614 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 [2022-11-19 07:29:24,040 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:29:24,042 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 [2022-11-19 07:29:24,319 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-19 07:29:24,320 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 2745 treesize of output 2749 [2022-11-19 07:29:35,377 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 [2022-11-19 07:29:35,431 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-19 07:29:35,431 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 [2022-11-19 07:29:35,447 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 [2022-11-19 07:29:35,727 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 431 treesize of output 391 [2022-11-19 07:29:35,821 INFO L321 Elim1Store]: treesize reduction 180, result has 10.4 percent of original size [2022-11-19 07:29:35,822 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 [2022-11-19 07:29:35,853 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 [2022-11-19 07:29:37,415 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 [2022-11-19 07:29:37,428 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 [2022-11-19 07:29:37,444 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 [2022-11-19 07:29:37,582 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 [2022-11-19 07:29:37,649 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-19 07:29:37,649 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 [2022-11-19 07:29:37,666 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 [2022-11-19 07:29:37,959 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 [2022-11-19 07:29:38,077 INFO L321 Elim1Store]: treesize reduction 220, result has 8.7 percent of original size [2022-11-19 07:29:38,078 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 408 [2022-11-19 07:29:38,107 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 395 treesize of output 367 [2022-11-19 07:29:40,461 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:336) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 07:29:40,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:40,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:29:40,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740614236] [2022-11-19 07:29:40,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:40,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:29:40,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:40,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:29:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:40,465 INFO L87 Difference]: Start difference. First operand 7163 states and 10250 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 5 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) [2022-11-19 07:29:45,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:29:47,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:29:49,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:29:50,877 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 [] [2022-11-19 07:29:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:51,984 INFO L93 Difference]: Finished difference Result 14433 states and 20703 transitions. [2022-11-19 07:29:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:29:51,984 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 [2022-11-19 07:29:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:52,012 INFO L225 Difference]: With dead ends: 14433 [2022-11-19 07:29:52,013 INFO L226 Difference]: Without dead ends: 7271 [2022-11-19 07:29:52,033 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 [2022-11-19 07:29:52,034 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 4 mSDsluCounter, 2382 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:52,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3181 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 602 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2022-11-19 07:29:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2022-11-19 07:29:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7271. [2022-11-19 07:29:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 4610 states have (on average 1.306941431670282) internal successors, (6025), 4757 states have internal predecessors, (6025), 2075 states have call successors, (2075), 586 states have call predecessors, (2075), 585 states have return successors, (2294), 1987 states have call predecessors, (2294), 2068 states have call successors, (2294) [2022-11-19 07:29:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10394 transitions. [2022-11-19 07:29:52,505 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10394 transitions. Word has length 165 [2022-11-19 07:29:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:52,506 INFO L495 AbstractCegarLoop]: Abstraction has 7271 states and 10394 transitions. [2022-11-19 07:29:52,506 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) [2022-11-19 07:29:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10394 transitions. [2022-11-19 07:29:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-19 07:29:52,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:52,515 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] [2022-11-19 07:29:52,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:29:52,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:29:52,726 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash 862090144, now seen corresponding path program 2 times [2022-11-19 07:29:52,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:52,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42090062] [2022-11-19 07:29:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:52,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-19 07:29:53,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42090062] [2022-11-19 07:29:53,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42090062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:53,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885793671] [2022-11-19 07:29:53,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:29:53,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:53,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:53,169 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:53,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:29:54,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:29:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:29:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-19 07:29:54,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:54,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885793671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:54,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:29:54,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2022-11-19 07:29:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187341428] [2022-11-19 07:29:54,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:54,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:29:54,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:29:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:29:54,195 INFO L87 Difference]: Start difference. First operand 7271 states and 10394 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) [2022-11-19 07:30:00,341 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 [] [2022-11-19 07:30:03,300 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 [] [2022-11-19 07:30:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:03,502 INFO L93 Difference]: Finished difference Result 7298 states and 10420 transitions. [2022-11-19 07:30:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:30:03,503 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 [2022-11-19 07:30:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:03,530 INFO L225 Difference]: With dead ends: 7298 [2022-11-19 07:30:03,530 INFO L226 Difference]: Without dead ends: 7295 [2022-11-19 07:30:03,536 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 [2022-11-19 07:30:03,537 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 16 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3910 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:03,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3910 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 791 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2022-11-19 07:30:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7295 states. [2022-11-19 07:30:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7295 to 7295. [2022-11-19 07:30:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7295 states, 4628 states have (on average 1.3057476231633536) internal successors, (6043), 4769 states have internal predecessors, (6043), 2075 states have call successors, (2075), 598 states have call predecessors, (2075), 591 states have return successors, (2294), 1987 states have call predecessors, (2294), 2068 states have call successors, (2294) [2022-11-19 07:30:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 10412 transitions. [2022-11-19 07:30:04,055 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 10412 transitions. Word has length 180 [2022-11-19 07:30:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:04,055 INFO L495 AbstractCegarLoop]: Abstraction has 7295 states and 10412 transitions. [2022-11-19 07:30:04,056 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) [2022-11-19 07:30:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 10412 transitions. [2022-11-19 07:30:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-19 07:30:04,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:04,062 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] [2022-11-19 07:30:04,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:04,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:30:04,270 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:04,271 INFO L85 PathProgramCache]: Analyzing trace with hash 988475977, now seen corresponding path program 1 times [2022-11-19 07:30:04,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:04,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522789342] [2022-11-19 07:30:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:04,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-19 07:30:04,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:04,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522789342] [2022-11-19 07:30:04,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522789342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:04,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027036679] [2022-11-19 07:30:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:04,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:04,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:30:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:30:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-19 07:30:05,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:30:05,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027036679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:30:05,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:30:05,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:30:05,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991402269] [2022-11-19 07:30:05,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:30:05,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:30:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:30:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:30:05,874 INFO L87 Difference]: Start difference. First operand 7295 states and 10412 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) [2022-11-19 07:30:09,615 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 [] [2022-11-19 07:30:14,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:14,618 INFO L93 Difference]: Finished difference Result 18372 states and 26962 transitions. [2022-11-19 07:30:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:30:14,619 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 [2022-11-19 07:30:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:14,655 INFO L225 Difference]: With dead ends: 18372 [2022-11-19 07:30:14,655 INFO L226 Difference]: Without dead ends: 11078 [2022-11-19 07:30:14,677 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 [2022-11-19 07:30:14,678 INFO L413 NwaCegarLoop]: 1236 mSDtfsCounter, 289 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:14,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 2129 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2022-11-19 07:30:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11078 states. [2022-11-19 07:30:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11078 to 7295. [2022-11-19 07:30:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7295 states, 4628 states have (on average 1.3031547104580812) internal successors, (6031), 4757 states have internal predecessors, (6031), 2075 states have call successors, (2075), 598 states have call predecessors, (2075), 591 states have return successors, (2294), 1987 states have call predecessors, (2294), 2068 states have call successors, (2294) [2022-11-19 07:30:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 10400 transitions. [2022-11-19 07:30:15,302 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 10400 transitions. Word has length 188 [2022-11-19 07:30:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:15,303 INFO L495 AbstractCegarLoop]: Abstraction has 7295 states and 10400 transitions. [2022-11-19 07:30:15,303 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) [2022-11-19 07:30:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 10400 transitions. [2022-11-19 07:30:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-19 07:30:15,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:15,311 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] [2022-11-19 07:30:15,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:15,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:30:15,521 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1826299231, now seen corresponding path program 1 times [2022-11-19 07:30:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:15,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956408795] [2022-11-19 07:30:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-19 07:30:16,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956408795] [2022-11-19 07:30:16,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956408795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030144040] [2022-11-19 07:30:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:16,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:16,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:16,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:16,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:30:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:17,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 2935 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:30:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-19 07:30:17,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-19 07:30:17,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030144040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972077328] [2022-11-19 07:30:17,570 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-19 07:30:17,570 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:17,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:17,571 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:17,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:22,656 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 [2022-11-19 07:30:22,668 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 [2022-11-19 07:30:27,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:27,949 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-19 07:30:27,950 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 [2022-11-19 07:30:28,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,319 INFO L217 Elim1Store]: Index analysis took 191 ms [2022-11-19 07:30:28,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:28,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:29,663 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-19 07:30:29,665 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 [2022-11-19 07:30:30,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:30,369 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-19 07:30:30,369 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 [2022-11-19 07:30:32,523 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:30:32,523 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 [2022-11-19 07:30:32,640 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:30:32,641 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 [2022-11-19 07:30:33,972 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 [2022-11-19 07:30:34,053 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-19 07:30:34,054 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 [2022-11-19 07:30:34,074 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 [2022-11-19 07:30:34,549 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 [2022-11-19 07:30:34,628 INFO L321 Elim1Store]: treesize reduction 180, result has 10.4 percent of original size [2022-11-19 07:30:34,628 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 [2022-11-19 07:30:34,648 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 [2022-11-19 07:30:35,095 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 [2022-11-19 07:30:35,113 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 [2022-11-19 07:30:35,136 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 [2022-11-19 07:30:35,386 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 [2022-11-19 07:30:35,455 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-19 07:30:35,456 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 [2022-11-19 07:30:35,478 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 [2022-11-19 07:30:35,881 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 [2022-11-19 07:30:35,971 INFO L321 Elim1Store]: treesize reduction 220, result has 8.7 percent of original size [2022-11-19 07:30:35,971 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 [2022-11-19 07:30:35,990 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 [2022-11-19 07:30:37,391 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:336) 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) [2022-11-19 07:30:37,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:37,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:30:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384499335] [2022-11-19 07:30:37,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:37,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:30:37,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:30:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:30:37,399 INFO L87 Difference]: Start difference. First operand 7295 states and 10400 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) [2022-11-19 07:30:41,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:44,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:44,507 INFO L93 Difference]: Finished difference Result 14697 states and 21027 transitions. [2022-11-19 07:30:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:30:44,507 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 [2022-11-19 07:30:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:44,530 INFO L225 Difference]: With dead ends: 14697 [2022-11-19 07:30:44,530 INFO L226 Difference]: Without dead ends: 7403 [2022-11-19 07:30:44,550 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 [2022-11-19 07:30:44,551 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 4 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:44,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2387 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 07:30:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7403 states. [2022-11-19 07:30:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7403 to 7403. [2022-11-19 07:30:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7403 states, 4700 states have (on average 1.2985106382978724) internal successors, (6103), 4829 states have internal predecessors, (6103), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-19 07:30:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7403 states to 7403 states and 10544 transitions. [2022-11-19 07:30:45,086 INFO L78 Accepts]: Start accepts. Automaton has 7403 states and 10544 transitions. Word has length 193 [2022-11-19 07:30:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:45,086 INFO L495 AbstractCegarLoop]: Abstraction has 7403 states and 10544 transitions. [2022-11-19 07:30:45,087 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) [2022-11-19 07:30:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7403 states and 10544 transitions. [2022-11-19 07:30:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-19 07:30:45,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:45,092 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] [2022-11-19 07:30:45,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:45,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:45,307 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1916766465, now seen corresponding path program 1 times [2022-11-19 07:30:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57407608] [2022-11-19 07:30:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-19 07:30:45,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:45,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57407608] [2022-11-19 07:30:45,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57407608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:45,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114104461] [2022-11-19 07:30:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:45,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:45,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:45,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:30:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:30:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:30:47,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-19 07:30:47,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114104461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:47,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269941465] [2022-11-19 07:30:47,211 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-19 07:30:47,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:47,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:47,212 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:47,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:52,756 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 [2022-11-19 07:30:52,767 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 [2022-11-19 07:30:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,425 INFO L217 Elim1Store]: Index analysis took 144 ms [2022-11-19 07:30:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:59,748 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-19 07:30:59,750 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 [2022-11-19 07:31:00,481 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:31:00,482 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 [2022-11-19 07:31:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:00,646 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-19 07:31:00,646 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 [2022-11-19 07:31:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:00,826 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-19 07:31:00,827 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 [2022-11-19 07:31:00,976 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:31:00,977 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 [2022-11-19 07:31:02,307 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 [2022-11-19 07:31:02,361 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-19 07:31:02,361 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 [2022-11-19 07:31:02,380 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 [2022-11-19 07:31:02,892 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 [2022-11-19 07:31:02,971 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-19 07:31:02,971 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 [2022-11-19 07:31:02,994 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 [2022-11-19 07:31:03,466 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 [2022-11-19 07:31:03,489 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 [2022-11-19 07:31:03,508 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 [2022-11-19 07:31:03,786 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 [2022-11-19 07:31:03,843 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-19 07:31:03,843 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 [2022-11-19 07:31:03,864 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 [2022-11-19 07:31:04,319 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 [2022-11-19 07:31:04,409 INFO L321 Elim1Store]: treesize reduction 220, result has 8.7 percent of original size [2022-11-19 07:31:04,409 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 [2022-11-19 07:31:04,430 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 [2022-11-19 07:31:05,713 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:336) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 07:31:05,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:05,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:31:05,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641249085] [2022-11-19 07:31:05,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:05,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:31:05,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:31:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:31:05,721 INFO L87 Difference]: Start difference. First operand 7403 states and 10544 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-19 07:31:10,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:13,284 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 [] [2022-11-19 07:31:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:13,572 INFO L93 Difference]: Finished difference Result 14841 states and 21191 transitions. [2022-11-19 07:31:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:31:13,573 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 [2022-11-19 07:31:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:13,593 INFO L225 Difference]: With dead ends: 14841 [2022-11-19 07:31:13,593 INFO L226 Difference]: Without dead ends: 7439 [2022-11-19 07:31:13,612 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 [2022-11-19 07:31:13,613 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 0 mSDsluCounter, 2388 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3185 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:13,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3185 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 586 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 07:31:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7439 states. [2022-11-19 07:31:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7439 to 7439. [2022-11-19 07:31:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 4736 states have (on average 1.296241554054054) internal successors, (6139), 4865 states have internal predecessors, (6139), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-19 07:31:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 10580 transitions. [2022-11-19 07:31:13,991 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 10580 transitions. Word has length 190 [2022-11-19 07:31:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:13,992 INFO L495 AbstractCegarLoop]: Abstraction has 7439 states and 10580 transitions. [2022-11-19 07:31:13,992 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) [2022-11-19 07:31:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 10580 transitions. [2022-11-19 07:31:13,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-19 07:31:13,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:13,998 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] [2022-11-19 07:31:14,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:14,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:14,209 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1266395425, now seen corresponding path program 2 times [2022-11-19 07:31:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:14,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564503459] [2022-11-19 07:31:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-19 07:31:14,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:14,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564503459] [2022-11-19 07:31:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564503459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500335706] [2022-11-19 07:31:14,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:31:14,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:14,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:14,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:14,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:31:15,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:31:15,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:15,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:31:15,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-19 07:31:15,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:31:15,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500335706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:15,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:31:15,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 07:31:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890607394] [2022-11-19 07:31:15,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:31:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:31:15,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:31:15,868 INFO L87 Difference]: Start difference. First operand 7439 states and 10580 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) [2022-11-19 07:31:20,281 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 [] [2022-11-19 07:31:23,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:26,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:28,354 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 [] [2022-11-19 07:31:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:28,881 INFO L93 Difference]: Finished difference Result 8998 states and 13043 transitions. [2022-11-19 07:31:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:31:28,881 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 [2022-11-19 07:31:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:28,904 INFO L225 Difference]: With dead ends: 8998 [2022-11-19 07:31:28,904 INFO L226 Difference]: Without dead ends: 8971 [2022-11-19 07:31:28,908 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 [2022-11-19 07:31:28,909 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 369 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:28,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 3042 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 460 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2022-11-19 07:31:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-11-19 07:31:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 7439. [2022-11-19 07:31:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 4736 states have (on average 1.2939189189189189) internal successors, (6128), 4865 states have internal predecessors, (6128), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-19 07:31:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 10569 transitions. [2022-11-19 07:31:29,372 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 10569 transitions. Word has length 193 [2022-11-19 07:31:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:29,373 INFO L495 AbstractCegarLoop]: Abstraction has 7439 states and 10569 transitions. [2022-11-19 07:31:29,373 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) [2022-11-19 07:31:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 10569 transitions. [2022-11-19 07:31:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-19 07:31:29,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:29,379 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] [2022-11-19 07:31:29,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:31:29,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:29,588 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash 68644922, now seen corresponding path program 1 times [2022-11-19 07:31:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896948217] [2022-11-19 07:31:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:29,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-19 07:31:30,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:30,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896948217] [2022-11-19 07:31:30,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896948217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:30,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418104877] [2022-11-19 07:31:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:30,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:30,066 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:30,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:31:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:31:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 07:31:31,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-19 07:31:31,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418104877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:31,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085864335] [2022-11-19 07:31:31,572 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2022-11-19 07:31:31,572 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:31,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:31,573 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:31,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:36,834 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 [2022-11-19 07:31:36,844 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 [2022-11-19 07:31:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,006 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-19 07:31:42,007 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 [2022-11-19 07:31:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,062 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-11-19 07:31:42,063 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 [2022-11-19 07:31:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,302 INFO L217 Elim1Store]: Index analysis took 151 ms [2022-11-19 07:31:42,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:42,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,551 INFO L321 Elim1Store]: treesize reduction 2155, result has 0.9 percent of original size [2022-11-19 07:31:43,553 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 [2022-11-19 07:31:44,257 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 07:31:44,257 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 [2022-11-19 07:31:44,378 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-19 07:31:44,378 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 [2022-11-19 07:31:45,549 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 [2022-11-19 07:31:45,600 INFO L321 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2022-11-19 07:31:45,600 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 [2022-11-19 07:31:45,619 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 [2022-11-19 07:31:46,000 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 [2022-11-19 07:31:46,090 INFO L321 Elim1Store]: treesize reduction 156, result has 22.4 percent of original size [2022-11-19 07:31:46,091 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 [2022-11-19 07:31:46,113 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 [2022-11-19 07:31:46,586 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 [2022-11-19 07:31:46,603 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 [2022-11-19 07:31:46,636 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 [2022-11-19 07:31:46,958 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 [2022-11-19 07:31:47,011 INFO L321 Elim1Store]: treesize reduction 82, result has 33.3 percent of original size [2022-11-19 07:31:47,012 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 [2022-11-19 07:31:47,031 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 [2022-11-19 07:31:47,505 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 [2022-11-19 07:31:47,593 INFO L321 Elim1Store]: treesize reduction 196, result has 18.7 percent of original size [2022-11-19 07:31:47,594 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 [2022-11-19 07:31:47,613 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 [2022-11-19 07:31:48,738 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:336) 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) [2022-11-19 07:31:48,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:48,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:31:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346935571] [2022-11-19 07:31:48,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:31:48,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:48,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:31:48,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:31:48,741 INFO L87 Difference]: Start difference. First operand 7439 states and 10569 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) [2022-11-19 07:31:53,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:55,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:57,243 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 [] [2022-11-19 07:31:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:57,603 INFO L93 Difference]: Finished difference Result 15093 states and 21457 transitions. [2022-11-19 07:31:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:31:57,607 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 [2022-11-19 07:31:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:57,628 INFO L225 Difference]: With dead ends: 15093 [2022-11-19 07:31:57,628 INFO L226 Difference]: Without dead ends: 7655 [2022-11-19 07:31:57,643 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 [2022-11-19 07:31:57,644 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 8 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:57,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2388 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 444 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2022-11-19 07:31:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7655 states. [2022-11-19 07:31:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7655 to 7655. [2022-11-19 07:31:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7655 states, 4952 states have (on average 1.2883683360258482) internal successors, (6380), 5081 states have internal predecessors, (6380), 2111 states have call successors, (2111), 598 states have call predecessors, (2111), 591 states have return successors, (2330), 2023 states have call predecessors, (2330), 2104 states have call successors, (2330) [2022-11-19 07:31:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7655 states to 7655 states and 10821 transitions. [2022-11-19 07:31:58,035 INFO L78 Accepts]: Start accepts. Automaton has 7655 states and 10821 transitions. Word has length 195 [2022-11-19 07:31:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:58,035 INFO L495 AbstractCegarLoop]: Abstraction has 7655 states and 10821 transitions. [2022-11-19 07:31:58,035 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) [2022-11-19 07:31:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7655 states and 10821 transitions. [2022-11-19 07:31:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-19 07:31:58,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:58,040 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] [2022-11-19 07:31:58,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:58,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:31:58,253 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1044348992, now seen corresponding path program 2 times [2022-11-19 07:31:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:58,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848579011] [2022-11-19 07:31:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-19 07:31:58,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:58,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848579011] [2022-11-19 07:31:58,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848579011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:58,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:58,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:31:58,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600630277] [2022-11-19 07:31:58,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:58,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:31:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:31:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:31:58,904 INFO L87 Difference]: Start difference. First operand 7655 states and 10821 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) [2022-11-19 07:32:03,227 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 [] [2022-11-19 07:32:06,399 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 [] [2022-11-19 07:32:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:06,808 INFO L93 Difference]: Finished difference Result 12007 states and 16981 transitions. [2022-11-19 07:32:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:32:06,808 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 [2022-11-19 07:32:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:06,841 INFO L225 Difference]: With dead ends: 12007 [2022-11-19 07:32:06,841 INFO L226 Difference]: Without dead ends: 12002 [2022-11-19 07:32:06,848 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 [2022-11-19 07:32:06,848 INFO L413 NwaCegarLoop]: 1103 mSDtfsCounter, 833 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:06,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 1888 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-11-19 07:32:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2022-11-19 07:32:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 11959. [2022-11-19 07:32:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11959 states, 7696 states have (on average 1.2863825363825363) internal successors, (9900), 7904 states have internal predecessors, (9900), 3309 states have call successors, (3309), 968 states have call predecessors, (3309), 953 states have return successors, (3717), 3164 states have call predecessors, (3717), 3302 states have call successors, (3717) [2022-11-19 07:32:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11959 states to 11959 states and 16926 transitions. [2022-11-19 07:32:07,575 INFO L78 Accepts]: Start accepts. Automaton has 11959 states and 16926 transitions. Word has length 208 [2022-11-19 07:32:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:07,575 INFO L495 AbstractCegarLoop]: Abstraction has 11959 states and 16926 transitions. [2022-11-19 07:32:07,575 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) [2022-11-19 07:32:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 11959 states and 16926 transitions. [2022-11-19 07:32:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-19 07:32:07,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:07,581 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] [2022-11-19 07:32:07,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 07:32:07,581 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:07,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1854073212, now seen corresponding path program 1 times [2022-11-19 07:32:07,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:07,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794675710] [2022-11-19 07:32:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:07,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-19 07:32:10,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:10,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794675710] [2022-11-19 07:32:10,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794675710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:10,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:10,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:32:10,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046858795] [2022-11-19 07:32:10,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:10,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:32:10,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:10,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:32:10,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:32:10,283 INFO L87 Difference]: Start difference. First operand 11959 states and 16926 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) [2022-11-19 07:32:16,540 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 [] [2022-11-19 07:32:20,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:22,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:25,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:27,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:29,795 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 [] [2022-11-19 07:32:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:32,609 INFO L93 Difference]: Finished difference Result 17613 states and 24980 transitions. [2022-11-19 07:32:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:32:32,610 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 [2022-11-19 07:32:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:32,657 INFO L225 Difference]: With dead ends: 17613 [2022-11-19 07:32:32,657 INFO L226 Difference]: Without dead ends: 17605 [2022-11-19 07:32:32,667 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 [2022-11-19 07:32:32,667 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 1366 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 983 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 3079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 983 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:32,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1517 Valid, 1885 Invalid, 3079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [983 Valid, 2092 Invalid, 4 Unknown, 0 Unchecked, 21.2s Time] [2022-11-19 07:32:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17605 states. [2022-11-19 07:32:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17605 to 17530. [2022-11-19 07:32:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17530 states, 11266 states have (on average 1.2875022190662169) internal successors, (14505), 11587 states have internal predecessors, (14505), 4873 states have call successors, (4873), 1422 states have call predecessors, (4873), 1390 states have return successors, (5485), 4637 states have call predecessors, (5485), 4866 states have call successors, (5485) [2022-11-19 07:32:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17530 states to 17530 states and 24863 transitions. [2022-11-19 07:32:33,763 INFO L78 Accepts]: Start accepts. Automaton has 17530 states and 24863 transitions. Word has length 225 [2022-11-19 07:32:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:33,763 INFO L495 AbstractCegarLoop]: Abstraction has 17530 states and 24863 transitions. [2022-11-19 07:32:33,764 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) [2022-11-19 07:32:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 17530 states and 24863 transitions. [2022-11-19 07:32:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-19 07:32:33,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:33,768 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] [2022-11-19 07:32:33,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-19 07:32:33,769 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:33,769 INFO L85 PathProgramCache]: Analyzing trace with hash 622629803, now seen corresponding path program 2 times [2022-11-19 07:32:33,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:33,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121152165] [2022-11-19 07:32:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:33,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-19 07:32:34,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121152165] [2022-11-19 07:32:34,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121152165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:34,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982870691] [2022-11-19 07:32:34,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:32:34,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:34,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:34,482 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:34,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:32:35,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:32:35,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:32:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:32:35,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-19 07:32:35,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:35,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982870691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:35,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:35,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-19 07:32:35,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060089611] [2022-11-19 07:32:35,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:35,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:35,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:35,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:32:35,899 INFO L87 Difference]: Start difference. First operand 17530 states and 24863 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) [2022-11-19 07:32:39,370 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 [] [2022-11-19 07:32:41,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:43,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:44,413 INFO L93 Difference]: Finished difference Result 35149 states and 49863 transitions. [2022-11-19 07:32:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:44,413 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 [2022-11-19 07:32:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:44,474 INFO L225 Difference]: With dead ends: 35149 [2022-11-19 07:32:44,474 INFO L226 Difference]: Without dead ends: 17620 [2022-11-19 07:32:44,517 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 [2022-11-19 07:32:44,518 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 315 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:44,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1460 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 363 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 07:32:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17620 states. [2022-11-19 07:32:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17620 to 17530. [2022-11-19 07:32:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17530 states, 11266 states have (on average 1.2823539854429256) internal successors, (14447), 11587 states have internal predecessors, (14447), 4873 states have call successors, (4873), 1422 states have call predecessors, (4873), 1390 states have return successors, (5485), 4637 states have call predecessors, (5485), 4866 states have call successors, (5485) [2022-11-19 07:32:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17530 states to 17530 states and 24805 transitions. [2022-11-19 07:32:45,761 INFO L78 Accepts]: Start accepts. Automaton has 17530 states and 24805 transitions. Word has length 213 [2022-11-19 07:32:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:45,761 INFO L495 AbstractCegarLoop]: Abstraction has 17530 states and 24805 transitions. [2022-11-19 07:32:45,762 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) [2022-11-19 07:32:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 17530 states and 24805 transitions. [2022-11-19 07:32:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-19 07:32:45,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:45,766 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] [2022-11-19 07:32:45,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 07:32:45,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:32:45,967 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1903139821, now seen corresponding path program 1 times [2022-11-19 07:32:45,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:45,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917849936] [2022-11-19 07:32:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:45,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-19 07:32:52,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:52,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917849936] [2022-11-19 07:32:52,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917849936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:52,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:32:52,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:32:52,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484556664] [2022-11-19 07:32:52,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:52,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:32:52,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:52,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:32:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:32:52,059 INFO L87 Difference]: Start difference. First operand 17530 states and 24805 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) [2022-11-19 07:32:55,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:58,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:00,451 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 [] [2022-11-19 07:33:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:01,372 INFO L93 Difference]: Finished difference Result 35083 states and 49657 transitions. [2022-11-19 07:33:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:33:01,373 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 [2022-11-19 07:33:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:01,423 INFO L225 Difference]: With dead ends: 35083 [2022-11-19 07:33:01,423 INFO L226 Difference]: Without dead ends: 17554 [2022-11-19 07:33:01,463 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 [2022-11-19 07:33:01,464 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 0 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:01,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1591 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2022-11-19 07:33:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17554 states. [2022-11-19 07:33:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17554 to 17554. [2022-11-19 07:33:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17554 states, 11290 states have (on average 1.2817537643932684) internal successors, (14471), 11611 states have internal predecessors, (14471), 4873 states have call successors, (4873), 1422 states have call predecessors, (4873), 1390 states have return successors, (5485), 4637 states have call predecessors, (5485), 4866 states have call successors, (5485) [2022-11-19 07:33:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17554 states to 17554 states and 24829 transitions. [2022-11-19 07:33:02,968 INFO L78 Accepts]: Start accepts. Automaton has 17554 states and 24829 transitions. Word has length 218 [2022-11-19 07:33:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:02,968 INFO L495 AbstractCegarLoop]: Abstraction has 17554 states and 24829 transitions. [2022-11-19 07:33:02,968 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) [2022-11-19 07:33:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17554 states and 24829 transitions. [2022-11-19 07:33:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-19 07:33:02,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:02,972 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] [2022-11-19 07:33:02,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 07:33:02,972 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1132951563, now seen corresponding path program 1 times [2022-11-19 07:33:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923008443] [2022-11-19 07:33:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-19 07:33:08,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923008443] [2022-11-19 07:33:08,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923008443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821302190] [2022-11-19 07:33:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:08,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:08,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:33:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 3740 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:33:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-19 07:33:09,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:33:09,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821302190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:09,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:33:09,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2022-11-19 07:33:09,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401527155] [2022-11-19 07:33:09,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:33:09,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:33:09,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:33:09,990 INFO L87 Difference]: Start difference. First operand 17554 states and 24829 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) [2022-11-19 07:33:17,827 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 [] [2022-11-19 07:33:20,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:22,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:24,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:26,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:28,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:31,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:36,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:40,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:42,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:44,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:45,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:49,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:33:52,103 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 [] [2022-11-19 07:33:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:52,696 INFO L93 Difference]: Finished difference Result 57727 states and 88958 transitions. [2022-11-19 07:33:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:33:52,697 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 [2022-11-19 07:33:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:52,907 INFO L225 Difference]: With dead ends: 57727 [2022-11-19 07:33:52,907 INFO L226 Difference]: Without dead ends: 40174 [2022-11-19 07:33:52,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:33:52,951 INFO L413 NwaCegarLoop]: 1399 mSDtfsCounter, 2332 mSDsluCounter, 10164 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 1192 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 11563 SdHoareTripleChecker+Invalid, 3210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:52,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2422 Valid, 11563 Invalid, 3210 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1192 Valid, 2013 Invalid, 5 Unknown, 0 Unchecked, 37.2s Time] [2022-11-19 07:33:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40174 states. [2022-11-19 07:33:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40174 to 14707. [2022-11-19 07:33:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14707 states, 9505 states have (on average 1.2567069963177275) internal successors, (11945), 9763 states have internal predecessors, (11945), 3874 states have call successors, (3874), 1341 states have call predecessors, (3874), 1327 states have return successors, (4650), 3701 states have call predecessors, (4650), 3867 states have call successors, (4650) [2022-11-19 07:33:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14707 states to 14707 states and 20469 transitions. [2022-11-19 07:33:54,683 INFO L78 Accepts]: Start accepts. Automaton has 14707 states and 20469 transitions. Word has length 219 [2022-11-19 07:33:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 14707 states and 20469 transitions. [2022-11-19 07:33:54,684 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) [2022-11-19 07:33:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 14707 states and 20469 transitions. [2022-11-19 07:33:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-19 07:33:54,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:54,686 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] [2022-11-19 07:33:54,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:54,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2505eed-3f53-4fba-9d84-7afd68d27378/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:33:54,887 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -29683499, now seen corresponding path program 1 times [2022-11-19 07:33:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:54,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055472910] [2022-11-19 07:33:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-19 07:33:56,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055472910] [2022-11-19 07:33:56,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055472910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:56,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:33:56,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:33:56,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415414714] [2022-11-19 07:33:56,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:56,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:33:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:33:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:33:56,865 INFO L87 Difference]: Start difference. First operand 14707 states and 20469 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) [2022-11-19 07:34:00,761 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 [] [2022-11-19 07:34:04,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:06,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:08,874 INFO L93 Difference]: Finished difference Result 17097 states and 23702 transitions. [2022-11-19 07:34:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:34:08,874 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 [2022-11-19 07:34:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:08,917 INFO L225 Difference]: With dead ends: 17097 [2022-11-19 07:34:08,918 INFO L226 Difference]: Without dead ends: 17086 [2022-11-19 07:34:08,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:08,924 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 1296 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 852 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:08,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 1132 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 1244 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2022-11-19 07:34:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17086 states. [2022-11-19 07:34:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17086 to 17025. [2022-11-19 07:34:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17025 states, 10965 states have (on average 1.253625170998632) internal successors, (13746), 11276 states have internal predecessors, (13746), 4487 states have call successors, (4487), 1588 states have call predecessors, (4487), 1572 states have return successors, (5380), 4277 states have call predecessors, (5380), 4480 states have call successors, (5380) [2022-11-19 07:34:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17025 states to 17025 states and 23613 transitions. [2022-11-19 07:34:10,553 INFO L78 Accepts]: Start accepts. Automaton has 17025 states and 23613 transitions. Word has length 239 [2022-11-19 07:34:10,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:10,553 INFO L495 AbstractCegarLoop]: Abstraction has 17025 states and 23613 transitions. [2022-11-19 07:34:10,554 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) [2022-11-19 07:34:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 17025 states and 23613 transitions. [2022-11-19 07:34:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-19 07:34:10,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:10,558 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] [2022-11-19 07:34:10,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-19 07:34:10,559 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:10,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1803571239, now seen corresponding path program 1 times [2022-11-19 07:34:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:10,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562600802] [2022-11-19 07:34:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 07:34:11,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562600802] [2022-11-19 07:34:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562600802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:11,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:11,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:11,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902375097] [2022-11-19 07:34:11,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:11,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:11,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:11,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:11,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:11,161 INFO L87 Difference]: Start difference. First operand 17025 states and 23613 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) [2022-11-19 07:34:14,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:17,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:19,868 INFO L93 Difference]: Finished difference Result 23619 states and 32765 transitions. [2022-11-19 07:34:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:19,870 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 [2022-11-19 07:34:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:19,933 INFO L225 Difference]: With dead ends: 23619 [2022-11-19 07:34:19,933 INFO L226 Difference]: Without dead ends: 23615 [2022-11-19 07:34:19,943 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 [2022-11-19 07:34:19,944 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 795 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:19,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1775 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-19 07:34:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23615 states. [2022-11-19 07:34:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23615 to 23472. [2022-11-19 07:34:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23472 states, 15022 states have (on average 1.2536280122487018) internal successors, (18832), 15513 states have internal predecessors, (18832), 6245 states have call successors, (6245), 2238 states have call predecessors, (6245), 2204 states have return successors, (7457), 5887 states have call predecessors, (7457), 6238 states have call successors, (7457) [2022-11-19 07:34:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23472 states to 23472 states and 32534 transitions. [2022-11-19 07:34:22,262 INFO L78 Accepts]: Start accepts. Automaton has 23472 states and 32534 transitions. Word has length 241 [2022-11-19 07:34:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:22,263 INFO L495 AbstractCegarLoop]: Abstraction has 23472 states and 32534 transitions. [2022-11-19 07:34:22,263 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) [2022-11-19 07:34:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 23472 states and 32534 transitions. [2022-11-19 07:34:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-19 07:34:22,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:22,268 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] [2022-11-19 07:34:22,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-19 07:34:22,269 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1737451199, now seen corresponding path program 1 times [2022-11-19 07:34:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:22,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524574545] [2022-11-19 07:34:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:22,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-19 07:34:22,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:22,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524574545] [2022-11-19 07:34:22,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524574545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:22,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:22,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35565046] [2022-11-19 07:34:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:22,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:22,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:22,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:22,678 INFO L87 Difference]: Start difference. First operand 23472 states and 32534 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) [2022-11-19 07:34:25,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:28,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:32,379 INFO L93 Difference]: Finished difference Result 37062 states and 51260 transitions. [2022-11-19 07:34:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:32,380 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 [2022-11-19 07:34:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:32,487 INFO L225 Difference]: With dead ends: 37062 [2022-11-19 07:34:32,487 INFO L226 Difference]: Without dead ends: 37059 [2022-11-19 07:34:32,500 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 [2022-11-19 07:34:32,501 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 837 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:32,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1781 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-19 07:34:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37059 states. [2022-11-19 07:34:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37059 to 37049. [2022-11-19 07:34:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37049 states, 23641 states have (on average 1.2525273888583393) internal successors, (29611), 24422 states have internal predecessors, (29611), 9873 states have call successors, (9873), 3588 states have call predecessors, (9873), 3534 states have return successors, (11731), 9305 states have call predecessors, (11731), 9866 states have call successors, (11731) [2022-11-19 07:34:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37049 states to 37049 states and 51215 transitions. [2022-11-19 07:34:36,392 INFO L78 Accepts]: Start accepts. Automaton has 37049 states and 51215 transitions. Word has length 241 [2022-11-19 07:34:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:36,392 INFO L495 AbstractCegarLoop]: Abstraction has 37049 states and 51215 transitions. [2022-11-19 07:34:36,393 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) [2022-11-19 07:34:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 37049 states and 51215 transitions. [2022-11-19 07:34:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-19 07:34:36,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:36,396 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] [2022-11-19 07:34:36,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-19 07:34:36,396 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1973187833, now seen corresponding path program 1 times [2022-11-19 07:34:36,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:36,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149789903] [2022-11-19 07:34:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:36,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-19 07:34:36,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149789903] [2022-11-19 07:34:36,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149789903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:36,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:36,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:34:36,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618031064] [2022-11-19 07:34:36,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:34:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:36,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:34:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:34:36,778 INFO L87 Difference]: Start difference. First operand 37049 states and 51215 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) [2022-11-19 07:34:39,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:42,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:45,856 INFO L93 Difference]: Finished difference Result 37051 states and 51216 transitions. [2022-11-19 07:34:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:34:45,856 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 [2022-11-19 07:34:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:45,998 INFO L225 Difference]: With dead ends: 37051 [2022-11-19 07:34:45,998 INFO L226 Difference]: Without dead ends: 37042 [2022-11-19 07:34:46,016 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 [2022-11-19 07:34:46,016 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 854 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:46,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 794 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-11-19 07:34:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37042 states. [2022-11-19 07:34:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37042 to 37038. [2022-11-19 07:34:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37038 states, 23631 states have (on average 1.250983877110575) internal successors, (29562), 24411 states have internal predecessors, (29562), 9872 states have call successors, (9872), 3588 states have call predecessors, (9872), 3534 states have return successors, (11731), 9305 states have call predecessors, (11731), 9866 states have call successors, (11731) [2022-11-19 07:34:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37038 states to 37038 states and 51165 transitions. [2022-11-19 07:34:50,093 INFO L78 Accepts]: Start accepts. Automaton has 37038 states and 51165 transitions. Word has length 242 [2022-11-19 07:34:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:50,093 INFO L495 AbstractCegarLoop]: Abstraction has 37038 states and 51165 transitions. [2022-11-19 07:34:50,093 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) [2022-11-19 07:34:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 37038 states and 51165 transitions. [2022-11-19 07:34:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-11-19 07:34:50,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:50,097 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] [2022-11-19 07:34:50,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-19 07:34:50,098 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 172928498, now seen corresponding path program 1 times [2022-11-19 07:34:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:50,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996270117] [2022-11-19 07:34:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-11-19 07:34:50,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:50,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996270117] [2022-11-19 07:34:50,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996270117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:50,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:50,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:34:50,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288975296] [2022-11-19 07:34:50,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:50,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:34:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:34:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:50,644 INFO L87 Difference]: Start difference. First operand 37038 states and 51165 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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) [2022-11-19 07:34:56,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:34:59,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:07,581 INFO L93 Difference]: Finished difference Result 86933 states and 123215 transitions. [2022-11-19 07:35:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:35:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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 261 [2022-11-19 07:35:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:07,766 INFO L225 Difference]: With dead ends: 86933 [2022-11-19 07:35:07,766 INFO L226 Difference]: Without dead ends: 49896 [2022-11-19 07:35:07,858 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 [2022-11-19 07:35:07,859 INFO L413 NwaCegarLoop]: 1221 mSDtfsCounter, 272 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 4542 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:07,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 4542 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 785 Invalid, 2 Unknown, 0 Unchecked, 10.4s Time] [2022-11-19 07:35:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49896 states. [2022-11-19 07:35:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49896 to 36966. [2022-11-19 07:35:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36966 states, 23647 states have (on average 1.2487842009557237) internal successors, (29530), 24355 states have internal predecessors, (29530), 9792 states have call successors, (9792), 3564 states have call predecessors, (9792), 3526 states have return successors, (11627), 9313 states have call predecessors, (11627), 9786 states have call successors, (11627) [2022-11-19 07:35:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36966 states to 36966 states and 50949 transitions. [2022-11-19 07:35:12,451 INFO L78 Accepts]: Start accepts. Automaton has 36966 states and 50949 transitions. Word has length 261 [2022-11-19 07:35:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:12,452 INFO L495 AbstractCegarLoop]: Abstraction has 36966 states and 50949 transitions. [2022-11-19 07:35:12,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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) [2022-11-19 07:35:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 36966 states and 50949 transitions. [2022-11-19 07:35:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-19 07:35:12,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:12,458 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] [2022-11-19 07:35:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-19 07:35:12,458 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:12,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1974727591, now seen corresponding path program 1 times [2022-11-19 07:35:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:12,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588321925] [2022-11-19 07:35:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:12,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 07:35:12,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588321925] [2022-11-19 07:35:12,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588321925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:12,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:12,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:35:12,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616439515] [2022-11-19 07:35:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:12,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:35:12,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:35:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:35:12,976 INFO L87 Difference]: Start difference. First operand 36966 states and 50949 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) [2022-11-19 07:35:17,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:19,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:21,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:23,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []