./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW --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 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc --- 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-4e7fbc6 [2022-11-23 14:34:30,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:34:30,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:34:31,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:34:31,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:34:31,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:34:31,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:34:31,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:34:31,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:34:31,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:34:31,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:34:31,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:34:31,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:34:31,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:34:31,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:34:31,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:34:31,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:34:31,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:34:31,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:34:31,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:34:31,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:34:31,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:34:31,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:34:31,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:34:31,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:34:31,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:34:31,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:34:31,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:34:31,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:34:31,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:34:31,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:34:31,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:34:31,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:34:31,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:34:31,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:34:31,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:34:31,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:34:31,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:34:31,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:34:31,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:34:31,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:34:31,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:34:31,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:34:31,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:34:31,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:34:31,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:34:31,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:34:31,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:34:31,138 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:34:31,138 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:34:31,138 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:34:31,138 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:34:31,139 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:34:31,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:34:31,139 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:34:31,139 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:34:31,139 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:34:31,140 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:34:31,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:34:31,140 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:34:31,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:34:31,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:34:31,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:34:31,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:34:31,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:34:31,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:34:31,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:34:31,142 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:34:31,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:34:31,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:34:31,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:34:31,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:34:31,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:34:31,144 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:34:31,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:34:31,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:34:31,144 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:34:31,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:34:31,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:34:31,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:34:31,145 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_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc [2022-11-23 14:34:31,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:34:31,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:34:31,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:34:31,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:34:31,428 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:34:31,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2022-11-23 14:34:34,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:34:35,015 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:34:35,015 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2022-11-23 14:34:35,051 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/data/f9ac955ca/99972276a0424121a55dee08dbb6ddd3/FLAG6c6b468e0 [2022-11-23 14:34:35,068 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/data/f9ac955ca/99972276a0424121a55dee08dbb6ddd3 [2022-11-23 14:34:35,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:34:35,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:34:35,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:34:35,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:34:35,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:34:35,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:35" (1/1) ... [2022-11-23 14:34:35,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcdc1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:35, skipping insertion in model container [2022-11-23 14:34:35,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:35" (1/1) ... [2022-11-23 14:34:35,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:34:35,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:34:36,611 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2022-11-23 14:34:36,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:34:36,792 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:34:37,153 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2022-11-23 14:34:37,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:34:37,285 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:34:37,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37 WrapperNode [2022-11-23 14:34:37,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:34:37,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:34:37,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:34:37,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:34:37,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,526 INFO L138 Inliner]: procedures = 196, calls = 1013, calls flagged for inlining = 91, calls inlined = 82, statements flattened = 2559 [2022-11-23 14:34:37,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:34:37,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:34:37,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:34:37,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:34:37,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:34:37,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:34:37,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:34:37,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:34:37,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (1/1) ... [2022-11-23 14:34:37,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:34:37,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:37,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:34:37,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:34:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:34:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_exit [2022-11-23 14:34:37,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_exit [2022-11-23 14:34:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2022-11-23 14:34:37,948 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2022-11-23 14:34:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:34:37,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:34:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_report [2022-11-23 14:34:37,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_report [2022-11-23 14:34:37,949 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2022-11-23 14:34:37,949 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2022-11-23 14:34:37,949 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 14:34:37,949 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 14:34:37,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 14:34:37,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 14:34:37,949 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-23 14:34:37,950 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-23 14:34:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_rfk_state [2022-11-23 14:34:37,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_rfk_state [2022-11-23 14:34:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:34:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:34:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure read_ec_data [2022-11-23 14:34:37,950 INFO L138 BoogieDeclarations]: Found implementation of procedure read_ec_data [2022-11-23 14:34:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:34:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-23 14:34:37,951 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-23 14:34:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_touchpad_state [2022-11-23 14:34:37,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_touchpad_state [2022-11-23 14:34:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:34:37,953 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 14:34:37,953 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 14:34:37,953 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_init [2022-11-23 14:34:37,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_init [2022-11-23 14:34:37,953 INFO L130 BoogieDeclarations]: Found specification of procedure acpi_evaluate_integer [2022-11-23 14:34:37,953 INFO L138 BoogieDeclarations]: Found implementation of procedure acpi_evaluate_integer [2022-11-23 14:34:37,953 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-23 14:34:37,954 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-23 14:34:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_notify [2022-11-23 14:34:37,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_notify [2022-11-23 14:34:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-23 14:34:37,954 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-23 14:34:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:34:37,955 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_destroy [2022-11-23 14:34:37,955 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_destroy [2022-11-23 14:34:37,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:34:37,955 INFO L130 BoogieDeclarations]: Found specification of procedure backlight_update_status [2022-11-23 14:34:37,955 INFO L138 BoogieDeclarations]: Found implementation of procedure backlight_update_status [2022-11-23 14:34:37,955 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2022-11-23 14:34:37,955 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2022-11-23 14:34:37,956 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_add [2022-11-23 14:34:37,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_add [2022-11-23 14:34:37,956 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_update_status [2022-11-23 14:34:37,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_update_status [2022-11-23 14:34:37,957 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 14:34:37,957 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 14:34:37,957 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_init_sw_state [2022-11-23 14:34:37,958 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_init_sw_state [2022-11-23 14:34:37,958 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 14:34:37,958 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 14:34:37,958 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_file [2022-11-23 14:34:37,958 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_file [2022-11-23 14:34:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:34:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-23 14:34:37,959 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-23 14:34:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_get_brightness [2022-11-23 14:34:37,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_get_brightness [2022-11-23 14:34:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_unregister_rfkill [2022-11-23 14:34:37,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_unregister_rfkill [2022-11-23 14:34:37,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:34:37,960 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2022-11-23 14:34:37,960 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2022-11-23 14:34:37,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:34:37,961 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcr [2022-11-23 14:34:37,961 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcr [2022-11-23 14:34:37,961 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcw [2022-11-23 14:34:37,962 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcw [2022-11-23 14:34:37,962 INFO L130 BoogieDeclarations]: Found specification of procedure sparse_keymap_free [2022-11-23 14:34:37,962 INFO L138 BoogieDeclarations]: Found implementation of procedure sparse_keymap_free [2022-11-23 14:34:37,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:34:37,962 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-23 14:34:37,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-23 14:34:37,963 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_resume [2022-11-23 14:34:37,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_resume [2022-11-23 14:34:37,963 INFO L130 BoogieDeclarations]: Found specification of procedure write_ec_cmd [2022-11-23 14:34:37,963 INFO L138 BoogieDeclarations]: Found implementation of procedure write_ec_cmd [2022-11-23 14:34:37,964 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_platform_exit [2022-11-23 14:34:37,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_platform_exit [2022-11-23 14:34:37,964 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_debugfs_exit [2022-11-23 14:34:37,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_debugfs_exit [2022-11-23 14:34:37,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:34:37,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:34:37,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:34:38,556 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:34:38,559 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:34:50,978 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:34:52,409 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:34:52,409 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:34:52,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:34:52 BoogieIcfgContainer [2022-11-23 14:34:52,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:34:52,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:34:52,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:34:52,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:34:52,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:34:35" (1/3) ... [2022-11-23 14:34:52,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552ab2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:34:52, skipping insertion in model container [2022-11-23 14:34:52,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:37" (2/3) ... [2022-11-23 14:34:52,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552ab2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:34:52, skipping insertion in model container [2022-11-23 14:34:52,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:34:52" (3/3) ... [2022-11-23 14:34:52,426 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2022-11-23 14:34:52,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:34:52,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:34:52,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:34:52,541 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46b1e580, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:34:52,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:34:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-23 14:34:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:34:52,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:52,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:52,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1614419724, now seen corresponding path program 1 times [2022-11-23 14:34:52,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:52,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717682276] [2022-11-23 14:34:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:53,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:53,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717682276] [2022-11-23 14:34:53,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717682276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:53,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:53,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:53,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337053557] [2022-11-23 14:34:53,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:53,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:53,456 INFO L87 Difference]: Start difference. First operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-23 14:34:55,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:34:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:56,193 INFO L93 Difference]: Finished difference Result 1401 states and 2081 transitions. [2022-11-23 14:34:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2022-11-23 14:34:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:56,214 INFO L225 Difference]: With dead ends: 1401 [2022-11-23 14:34:56,214 INFO L226 Difference]: Without dead ends: 927 [2022-11-23 14:34:56,220 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 [2022-11-23 14:34:56,223 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 655 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:56,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1289 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:34:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-23 14:34:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2022-11-23 14:34:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 621 states have (on average 1.4669887278582932) internal successors, (911), 649 states have internal predecessors, (911), 225 states have call successors, (225), 77 states have call predecessors, (225), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-23 14:34:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1354 transitions. [2022-11-23 14:34:56,340 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1354 transitions. Word has length 18 [2022-11-23 14:34:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:56,341 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1354 transitions. [2022-11-23 14:34:56,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-23 14:34:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1354 transitions. [2022-11-23 14:34:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:34:56,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:56,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:56,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:34:56,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash 230421843, now seen corresponding path program 1 times [2022-11-23 14:34:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:56,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918389484] [2022-11-23 14:34:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:56,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918389484] [2022-11-23 14:34:56,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918389484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:56,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:56,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:56,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645136949] [2022-11-23 14:34:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:56,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:56,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:56,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:56,719 INFO L87 Difference]: Start difference. First operand 923 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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) [2022-11-23 14:34:58,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:34:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:59,172 INFO L93 Difference]: Finished difference Result 925 states and 1355 transitions. [2022-11-23 14:34:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 20 [2022-11-23 14:34:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:59,178 INFO L225 Difference]: With dead ends: 925 [2022-11-23 14:34:59,178 INFO L226 Difference]: Without dead ends: 922 [2022-11-23 14:34:59,179 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 [2022-11-23 14:34:59,180 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 670 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:59,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 589 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 14:34:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-11-23 14:34:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2022-11-23 14:34:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 621 states have (on average 1.465378421900161) internal successors, (910), 648 states have internal predecessors, (910), 224 states have call successors, (224), 77 states have call predecessors, (224), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-23 14:34:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1352 transitions. [2022-11-23 14:34:59,235 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1352 transitions. Word has length 20 [2022-11-23 14:34:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:59,236 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1352 transitions. [2022-11-23 14:34:59,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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) [2022-11-23 14:34:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1352 transitions. [2022-11-23 14:34:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:34:59,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:59,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:59,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:34:59,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1447111222, now seen corresponding path program 1 times [2022-11-23 14:34:59,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447135857] [2022-11-23 14:34:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:59,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:59,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:59,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447135857] [2022-11-23 14:34:59,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447135857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:59,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:59,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652795909] [2022-11-23 14:34:59,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:59,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:59,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:59,533 INFO L87 Difference]: Start difference. First operand 922 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2022-11-23 14:35:01,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:01,890 INFO L93 Difference]: Finished difference Result 924 states and 1353 transitions. [2022-11-23 14:35:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 21 [2022-11-23 14:35:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:01,896 INFO L225 Difference]: With dead ends: 924 [2022-11-23 14:35:01,896 INFO L226 Difference]: Without dead ends: 921 [2022-11-23 14:35:01,897 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 [2022-11-23 14:35:01,898 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 667 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:01,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 587 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:35:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-23 14:35:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2022-11-23 14:35:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 621 states have (on average 1.463768115942029) internal successors, (909), 647 states have internal predecessors, (909), 223 states have call successors, (223), 77 states have call predecessors, (223), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-23 14:35:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1350 transitions. [2022-11-23 14:35:01,955 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1350 transitions. Word has length 21 [2022-11-23 14:35:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:01,955 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1350 transitions. [2022-11-23 14:35:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2022-11-23 14:35:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1350 transitions. [2022-11-23 14:35:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:35:01,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:01,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:35:01,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1911023818, now seen corresponding path program 1 times [2022-11-23 14:35:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:01,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332447510] [2022-11-23 14:35:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:02,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:02,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332447510] [2022-11-23 14:35:02,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332447510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:02,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:02,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719030559] [2022-11-23 14:35:02,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:02,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:02,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:02,205 INFO L87 Difference]: Start difference. First operand 921 states and 1350 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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) [2022-11-23 14:35:04,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:04,564 INFO L93 Difference]: Finished difference Result 923 states and 1351 transitions. [2022-11-23 14:35:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:04,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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 22 [2022-11-23 14:35:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:04,569 INFO L225 Difference]: With dead ends: 923 [2022-11-23 14:35:04,570 INFO L226 Difference]: Without dead ends: 920 [2022-11-23 14:35:04,571 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 [2022-11-23 14:35:04,571 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 664 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:04,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 585 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:35:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-23 14:35:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2022-11-23 14:35:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 621 states have (on average 1.462157809983897) internal successors, (908), 646 states have internal predecessors, (908), 222 states have call successors, (222), 77 states have call predecessors, (222), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-23 14:35:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1348 transitions. [2022-11-23 14:35:04,631 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1348 transitions. Word has length 22 [2022-11-23 14:35:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:04,632 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1348 transitions. [2022-11-23 14:35:04,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 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) [2022-11-23 14:35:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1348 transitions. [2022-11-23 14:35:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:35:04,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:04,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:04,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:35:04,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash 887559757, now seen corresponding path program 1 times [2022-11-23 14:35:04,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156867093] [2022-11-23 14:35:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:04,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156867093] [2022-11-23 14:35:04,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156867093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:04,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:04,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711071132] [2022-11-23 14:35:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:04,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:04,858 INFO L87 Difference]: Start difference. First operand 920 states and 1348 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2022-11-23 14:35:06,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:07,227 INFO L93 Difference]: Finished difference Result 922 states and 1349 transitions. [2022-11-23 14:35:07,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:07,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 23 [2022-11-23 14:35:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:07,233 INFO L225 Difference]: With dead ends: 922 [2022-11-23 14:35:07,233 INFO L226 Difference]: Without dead ends: 919 [2022-11-23 14:35:07,234 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 [2022-11-23 14:35:07,235 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 661 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:07,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 583 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:35:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-23 14:35:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2022-11-23 14:35:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 621 states have (on average 1.460547504025765) internal successors, (907), 645 states have internal predecessors, (907), 221 states have call successors, (221), 77 states have call predecessors, (221), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-23 14:35:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1346 transitions. [2022-11-23 14:35:07,360 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1346 transitions. Word has length 23 [2022-11-23 14:35:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:07,361 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1346 transitions. [2022-11-23 14:35:07,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2022-11-23 14:35:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1346 transitions. [2022-11-23 14:35:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:35:07,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:07,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:35:07,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1744309529, now seen corresponding path program 1 times [2022-11-23 14:35:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:07,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45626434] [2022-11-23 14:35:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:07,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:07,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45626434] [2022-11-23 14:35:07,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45626434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:07,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:07,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425688087] [2022-11-23 14:35:07,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:07,637 INFO L87 Difference]: Start difference. First operand 919 states and 1346 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2022-11-23 14:35:09,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:10,248 INFO L93 Difference]: Finished difference Result 2289 states and 3302 transitions. [2022-11-23 14:35:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 24 [2022-11-23 14:35:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:10,259 INFO L225 Difference]: With dead ends: 2289 [2022-11-23 14:35:10,259 INFO L226 Difference]: Without dead ends: 1365 [2022-11-23 14:35:10,265 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 [2022-11-23 14:35:10,267 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 631 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:10,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 911 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 14:35:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-11-23 14:35:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1359. [2022-11-23 14:35:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 894 states have (on average 1.4116331096196868) internal successors, (1262), 926 states have internal predecessors, (1262), 330 states have call successors, (330), 135 states have call predecessors, (330), 134 states have return successors, (334), 321 states have call predecessors, (334), 328 states have call successors, (334) [2022-11-23 14:35:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1926 transitions. [2022-11-23 14:35:10,376 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1926 transitions. Word has length 24 [2022-11-23 14:35:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:10,377 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1926 transitions. [2022-11-23 14:35:10,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2022-11-23 14:35:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1926 transitions. [2022-11-23 14:35:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-23 14:35:10,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:10,385 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-23 14:35:10,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:35:10,386 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1744246743, now seen corresponding path program 1 times [2022-11-23 14:35:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:10,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860795529] [2022-11-23 14:35:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:35:10,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:10,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860795529] [2022-11-23 14:35:10,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860795529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:10,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:10,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:35:10,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520470445] [2022-11-23 14:35:10,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:10,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:10,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:10,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:10,908 INFO L87 Difference]: Start difference. First operand 1359 states and 1926 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:35:12,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:13,481 INFO L93 Difference]: Finished difference Result 2454 states and 3507 transitions. [2022-11-23 14:35:13,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:13,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 154 [2022-11-23 14:35:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:13,487 INFO L225 Difference]: With dead ends: 2454 [2022-11-23 14:35:13,487 INFO L226 Difference]: Without dead ends: 1096 [2022-11-23 14:35:13,492 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 [2022-11-23 14:35:13,493 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 298 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:13,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1181 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 14:35:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-11-23 14:35:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2022-11-23 14:35:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 744 states have (on average 1.461021505376344) internal successors, (1087), 762 states have internal predecessors, (1087), 246 states have call successors, (246), 106 states have call predecessors, (246), 105 states have return successors, (247), 241 states have call predecessors, (247), 244 states have call successors, (247) [2022-11-23 14:35:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1580 transitions. [2022-11-23 14:35:13,654 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1580 transitions. Word has length 154 [2022-11-23 14:35:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:13,655 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1580 transitions. [2022-11-23 14:35:13,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:35:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1580 transitions. [2022-11-23 14:35:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-23 14:35:13,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:13,662 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-23 14:35:13,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:35:13,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash 96110057, now seen corresponding path program 1 times [2022-11-23 14:35:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:13,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568603877] [2022-11-23 14:35:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:13,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-23 14:35:14,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:14,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568603877] [2022-11-23 14:35:14,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568603877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:14,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:14,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:35:14,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157969784] [2022-11-23 14:35:14,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:14,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:14,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:14,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:14,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:14,442 INFO L87 Difference]: Start difference. First operand 1096 states and 1580 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:35:16,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:17,162 INFO L93 Difference]: Finished difference Result 1997 states and 2879 transitions. [2022-11-23 14:35:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:35:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 169 [2022-11-23 14:35:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:17,169 INFO L225 Difference]: With dead ends: 1997 [2022-11-23 14:35:17,169 INFO L226 Difference]: Without dead ends: 1108 [2022-11-23 14:35:17,173 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 [2022-11-23 14:35:17,174 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 7 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:17,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1716 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:35:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-11-23 14:35:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1104. [2022-11-23 14:35:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 750 states have (on average 1.4573333333333334) internal successors, (1093), 769 states have internal predecessors, (1093), 247 states have call successors, (247), 106 states have call predecessors, (247), 106 states have return successors, (249), 242 states have call predecessors, (249), 245 states have call successors, (249) [2022-11-23 14:35:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2022-11-23 14:35:17,263 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 169 [2022-11-23 14:35:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:17,264 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2022-11-23 14:35:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:35:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2022-11-23 14:35:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-23 14:35:17,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:17,273 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-23 14:35:17,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:35:17,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2081288391, now seen corresponding path program 1 times [2022-11-23 14:35:17,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:17,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733566191] [2022-11-23 14:35:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:17,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-23 14:35:17,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:17,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733566191] [2022-11-23 14:35:17,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733566191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:17,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:17,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:35:17,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29583498] [2022-11-23 14:35:17,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:17,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:35:17,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:35:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:17,956 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:35:19,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:20,808 INFO L93 Difference]: Finished difference Result 2021 states and 2907 transitions. [2022-11-23 14:35:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:35:20,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 175 [2022-11-23 14:35:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:20,818 INFO L225 Difference]: With dead ends: 2021 [2022-11-23 14:35:20,818 INFO L226 Difference]: Without dead ends: 1124 [2022-11-23 14:35:20,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:35:20,824 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 17 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:20,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2296 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 400 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 14:35:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-23 14:35:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1104. [2022-11-23 14:35:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 750 states have (on average 1.4573333333333334) internal successors, (1093), 769 states have internal predecessors, (1093), 247 states have call successors, (247), 106 states have call predecessors, (247), 106 states have return successors, (249), 242 states have call predecessors, (249), 245 states have call successors, (249) [2022-11-23 14:35:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2022-11-23 14:35:20,899 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 175 [2022-11-23 14:35:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:20,900 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2022-11-23 14:35:20,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:35:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2022-11-23 14:35:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-23 14:35:20,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:20,905 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-23 14:35:20,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:35:20,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash 619583377, now seen corresponding path program 1 times [2022-11-23 14:35:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:20,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364551440] [2022-11-23 14:35:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-23 14:35:21,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:21,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364551440] [2022-11-23 14:35:21,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364551440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:21,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:21,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:35:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585276030] [2022-11-23 14:35:21,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:21,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:21,482 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:35:23,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:24,132 INFO L93 Difference]: Finished difference Result 2015 states and 2901 transitions. [2022-11-23 14:35:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:35:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 175 [2022-11-23 14:35:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:24,143 INFO L225 Difference]: With dead ends: 2015 [2022-11-23 14:35:24,143 INFO L226 Difference]: Without dead ends: 1118 [2022-11-23 14:35:24,147 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 [2022-11-23 14:35:24,147 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 7 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:24,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1721 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 14:35:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-11-23 14:35:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1109. [2022-11-23 14:35:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 754 states have (on average 1.4549071618037135) internal successors, (1097), 774 states have internal predecessors, (1097), 248 states have call successors, (248), 106 states have call predecessors, (248), 106 states have return successors, (250), 243 states have call predecessors, (250), 246 states have call successors, (250) [2022-11-23 14:35:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1595 transitions. [2022-11-23 14:35:24,226 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1595 transitions. Word has length 175 [2022-11-23 14:35:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:24,227 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 1595 transitions. [2022-11-23 14:35:24,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:35:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1595 transitions. [2022-11-23 14:35:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-23 14:35:24,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:24,234 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:24,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:35:24,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash 520028927, now seen corresponding path program 1 times [2022-11-23 14:35:24,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:24,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97212163] [2022-11-23 14:35:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:24,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-23 14:35:24,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97212163] [2022-11-23 14:35:24,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97212163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:24,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:24,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:35:24,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093645703] [2022-11-23 14:35:24,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:24,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:24,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:24,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:24,806 INFO L87 Difference]: Start difference. First operand 1109 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:35:26,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:27,550 INFO L93 Difference]: Finished difference Result 2027 states and 2917 transitions. [2022-11-23 14:35:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:35:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 192 [2022-11-23 14:35:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:27,557 INFO L225 Difference]: With dead ends: 2027 [2022-11-23 14:35:27,557 INFO L226 Difference]: Without dead ends: 1125 [2022-11-23 14:35:27,561 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 [2022-11-23 14:35:27,562 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 7 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:27,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1725 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:35:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-23 14:35:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1114. [2022-11-23 14:35:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 758 states have (on average 1.4525065963060686) internal successors, (1101), 779 states have internal predecessors, (1101), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2022-11-23 14:35:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1601 transitions. [2022-11-23 14:35:27,637 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1601 transitions. Word has length 192 [2022-11-23 14:35:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:27,638 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1601 transitions. [2022-11-23 14:35:27,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:35:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1601 transitions. [2022-11-23 14:35:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-23 14:35:27,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:27,644 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:27,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:35:27,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1027053048, now seen corresponding path program 1 times [2022-11-23 14:35:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:27,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801623430] [2022-11-23 14:35:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-23 14:35:28,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801623430] [2022-11-23 14:35:28,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801623430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:28,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:28,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:35:28,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682652094] [2022-11-23 14:35:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:28,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:28,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:28,207 INFO L87 Difference]: Start difference. First operand 1114 states and 1601 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:35:30,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:30,701 INFO L93 Difference]: Finished difference Result 2077 states and 2993 transitions. [2022-11-23 14:35:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 194 [2022-11-23 14:35:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:30,708 INFO L225 Difference]: With dead ends: 2077 [2022-11-23 14:35:30,708 INFO L226 Difference]: Without dead ends: 1170 [2022-11-23 14:35:30,711 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 [2022-11-23 14:35:30,712 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 22 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:30,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1146 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 14:35:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-23 14:35:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1118. [2022-11-23 14:35:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 762 states have (on average 1.4501312335958005) internal successors, (1105), 783 states have internal predecessors, (1105), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2022-11-23 14:35:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1605 transitions. [2022-11-23 14:35:30,792 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1605 transitions. Word has length 194 [2022-11-23 14:35:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:30,793 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1605 transitions. [2022-11-23 14:35:30,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:35:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1605 transitions. [2022-11-23 14:35:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-23 14:35:30,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:30,799 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:35:30,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 373750716, now seen corresponding path program 1 times [2022-11-23 14:35:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306431378] [2022-11-23 14:35:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-23 14:35:31,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306431378] [2022-11-23 14:35:31,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306431378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859834815] [2022-11-23 14:35:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:31,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:31,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:35:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 4425 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:35:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 14:35:33,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:33,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859834815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:33,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:35:33,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:35:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947307822] [2022-11-23 14:35:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:33,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:33,261 INFO L87 Difference]: Start difference. First operand 1118 states and 1605 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 14:35:35,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:35,877 INFO L93 Difference]: Finished difference Result 1423 states and 1991 transitions. [2022-11-23 14:35:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:35,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 201 [2022-11-23 14:35:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:35,885 INFO L225 Difference]: With dead ends: 1423 [2022-11-23 14:35:35,885 INFO L226 Difference]: Without dead ends: 1111 [2022-11-23 14:35:35,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:35,887 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 314 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:35,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1351 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 14:35:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-11-23 14:35:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1105. [2022-11-23 14:35:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 755 states have (on average 1.4516556291390728) internal successors, (1096), 773 states have internal predecessors, (1096), 245 states have call successors, (245), 106 states have call predecessors, (245), 104 states have return successors, (243), 239 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-23 14:35:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1584 transitions. [2022-11-23 14:35:35,963 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1584 transitions. Word has length 201 [2022-11-23 14:35:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:35,963 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1584 transitions. [2022-11-23 14:35:35,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 14:35:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1584 transitions. [2022-11-23 14:35:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-23 14:35:35,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:35,973 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:35:35,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:36,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:35:36,194 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1467801152, now seen corresponding path program 1 times [2022-11-23 14:35:36,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:36,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864465297] [2022-11-23 14:35:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:36,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-11-23 14:35:37,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:37,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864465297] [2022-11-23 14:35:37,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864465297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:37,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084915821] [2022-11-23 14:35:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:37,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:37,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:37,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:35:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 6866 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:35:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2022-11-23 14:35:39,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-11-23 14:35:40,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084915821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:40,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470065595] [2022-11-23 14:35:40,161 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2022-11-23 14:35:40,161 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:35:40,166 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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) [2022-11-23 14:35:40,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:35:40,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-23 14:35:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781047706] [2022-11-23 14:35:40,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:35:40,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:35:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:40,172 INFO L87 Difference]: Start difference. First operand 1105 states and 1584 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2022-11-23 14:35:42,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:42,961 INFO L93 Difference]: Finished difference Result 2115 states and 3043 transitions. [2022-11-23 14:35:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:35:42,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) Word has length 365 [2022-11-23 14:35:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:42,970 INFO L225 Difference]: With dead ends: 2115 [2022-11-23 14:35:42,970 INFO L226 Difference]: Without dead ends: 1217 [2022-11-23 14:35:42,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 727 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:42,974 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 85 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:42,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1712 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 344 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 14:35:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-11-23 14:35:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1217. [2022-11-23 14:35:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 831 states have (on average 1.434416365824308) internal successors, (1192), 849 states have internal predecessors, (1192), 281 states have call successors, (281), 106 states have call predecessors, (281), 104 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2022-11-23 14:35:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1752 transitions. [2022-11-23 14:35:43,057 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1752 transitions. Word has length 365 [2022-11-23 14:35:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:43,058 INFO L495 AbstractCegarLoop]: Abstraction has 1217 states and 1752 transitions. [2022-11-23 14:35:43,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2022-11-23 14:35:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1752 transitions. [2022-11-23 14:35:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-11-23 14:35:43,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:43,069 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:43,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:43,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:35:43,288 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:43,289 INFO L85 PathProgramCache]: Analyzing trace with hash 632358080, now seen corresponding path program 2 times [2022-11-23 14:35:43,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:43,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417828838] [2022-11-23 14:35:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:43,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 101 proven. 14 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2022-11-23 14:35:44,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:44,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417828838] [2022-11-23 14:35:44,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417828838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:44,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184622213] [2022-11-23 14:35:44,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:35:44,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:44,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:44,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:44,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:46:40,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:46:40,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:40,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:46:40,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2022-11-23 14:46:40,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:46:40,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184622213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:40,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:46:40,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-23 14:46:40,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355425773] [2022-11-23 14:46:40,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:40,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:40,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:46:40,966 INFO L87 Difference]: Start difference. First operand 1217 states and 1752 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:46:43,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:43,745 INFO L93 Difference]: Finished difference Result 2243 states and 3257 transitions. [2022-11-23 14:46:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:46:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 393 [2022-11-23 14:46:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:43,771 INFO L225 Difference]: With dead ends: 2243 [2022-11-23 14:46:43,772 INFO L226 Difference]: Without dead ends: 1233 [2022-11-23 14:46:43,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:46:43,776 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 2 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:43,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2275 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 14:46:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-11-23 14:46:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1225. [2022-11-23 14:46:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 837 states have (on average 1.4313022700119475) internal successors, (1198), 855 states have internal predecessors, (1198), 281 states have call successors, (281), 106 states have call predecessors, (281), 106 states have return successors, (306), 277 states have call predecessors, (306), 279 states have call successors, (306) [2022-11-23 14:46:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1785 transitions. [2022-11-23 14:46:43,861 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1785 transitions. Word has length 393 [2022-11-23 14:46:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:43,862 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1785 transitions. [2022-11-23 14:46:43,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:46:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1785 transitions. [2022-11-23 14:46:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-11-23 14:46:43,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:43,875 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:46:43,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:44,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:46:44,091 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -306876658, now seen corresponding path program 1 times [2022-11-23 14:46:44,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:44,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804785245] [2022-11-23 14:46:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:44,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 101 proven. 14 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2022-11-23 14:46:45,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:45,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804785245] [2022-11-23 14:46:45,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804785245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:45,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302916574] [2022-11-23 14:46:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:45,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:45,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:45,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:45,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:46:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:47,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 7798 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:46:47,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 481 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-11-23 14:46:47,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:46:47,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302916574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:47,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:46:47,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-11-23 14:46:47,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524451280] [2022-11-23 14:46:47,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:47,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:47,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:47,966 INFO L87 Difference]: Start difference. First operand 1225 states and 1785 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (48), 3 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-23 14:46:50,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:50,691 INFO L93 Difference]: Finished difference Result 2255 states and 3294 transitions. [2022-11-23 14:46:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:46:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (48), 3 states have call predecessors, (48), 2 states have call successors, (48) Word has length 437 [2022-11-23 14:46:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:50,698 INFO L225 Difference]: With dead ends: 2255 [2022-11-23 14:46:50,699 INFO L226 Difference]: Without dead ends: 1237 [2022-11-23 14:46:50,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:50,703 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 2 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:50,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2268 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:46:50,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-11-23 14:46:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1229. [2022-11-23 14:46:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 841 states have (on average 1.4292508917954816) internal successors, (1202), 857 states have internal predecessors, (1202), 281 states have call successors, (281), 106 states have call predecessors, (281), 106 states have return successors, (306), 279 states have call predecessors, (306), 279 states have call successors, (306) [2022-11-23 14:46:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1789 transitions. [2022-11-23 14:46:50,788 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1789 transitions. Word has length 437 [2022-11-23 14:46:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:50,789 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1789 transitions. [2022-11-23 14:46:50,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (48), 3 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-23 14:46:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1789 transitions. [2022-11-23 14:46:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-11-23 14:46:50,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:50,804 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:50,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:51,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash -137302564, now seen corresponding path program 2 times [2022-11-23 14:46:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:51,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590666073] [2022-11-23 14:46:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 106 proven. 12 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-11-23 14:46:52,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:52,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590666073] [2022-11-23 14:46:52,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590666073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:52,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958659550] [2022-11-23 14:46:52,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:52,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:52,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:52,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:52,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:46:54,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 14:46:54,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:46:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2022-11-23 14:46:54,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:46:54,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958659550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:54,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:46:54,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:46:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854910694] [2022-11-23 14:46:54,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:46:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:46:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:46:54,464 INFO L87 Difference]: Start difference. First operand 1229 states and 1789 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 14:46:56,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:56,930 INFO L93 Difference]: Finished difference Result 2253 states and 3282 transitions. [2022-11-23 14:46:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:46:56,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 481 [2022-11-23 14:46:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:56,937 INFO L225 Difference]: With dead ends: 2253 [2022-11-23 14:46:56,937 INFO L226 Difference]: Without dead ends: 1231 [2022-11-23 14:46:56,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:46:56,943 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 0 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:56,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1145 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 14:46:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-23 14:46:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1231. [2022-11-23 14:46:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 843 states have (on average 1.4282325029655991) internal successors, (1204), 859 states have internal predecessors, (1204), 281 states have call successors, (281), 106 states have call predecessors, (281), 106 states have return successors, (306), 279 states have call predecessors, (306), 279 states have call successors, (306) [2022-11-23 14:46:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1791 transitions. [2022-11-23 14:46:57,031 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1791 transitions. Word has length 481 [2022-11-23 14:46:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:57,032 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1791 transitions. [2022-11-23 14:46:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 14:46:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1791 transitions. [2022-11-23 14:46:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-23 14:46:57,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:57,041 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:57,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:57,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:46:57,259 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1297724528, now seen corresponding path program 1 times [2022-11-23 14:46:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:57,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82891319] [2022-11-23 14:46:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:57,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 106 proven. 12 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2022-11-23 14:46:58,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82891319] [2022-11-23 14:46:58,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82891319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938983018] [2022-11-23 14:46:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:58,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:58,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:47:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 8596 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:47:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 620 proven. 0 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-11-23 14:47:01,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:47:01,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938983018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:01,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:47:01,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-11-23 14:47:01,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501061990] [2022-11-23 14:47:01,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:01,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:47:01,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:47:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:47:01,776 INFO L87 Difference]: Start difference. First operand 1231 states and 1791 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-23 14:47:03,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:04,463 INFO L93 Difference]: Finished difference Result 2267 states and 3306 transitions. [2022-11-23 14:47:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:47:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) Word has length 483 [2022-11-23 14:47:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:04,471 INFO L225 Difference]: With dead ends: 2267 [2022-11-23 14:47:04,471 INFO L226 Difference]: Without dead ends: 1243 [2022-11-23 14:47:04,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:47:04,476 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 2 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:04,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2275 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:47:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-11-23 14:47:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1235. [2022-11-23 14:47:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 847 states have (on average 1.4262101534828808) internal successors, (1208), 861 states have internal predecessors, (1208), 281 states have call successors, (281), 106 states have call predecessors, (281), 106 states have return successors, (306), 281 states have call predecessors, (306), 279 states have call successors, (306) [2022-11-23 14:47:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1795 transitions. [2022-11-23 14:47:04,557 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1795 transitions. Word has length 483 [2022-11-23 14:47:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:04,558 INFO L495 AbstractCegarLoop]: Abstraction has 1235 states and 1795 transitions. [2022-11-23 14:47:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-23 14:47:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1795 transitions. [2022-11-23 14:47:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-23 14:47:04,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:04,567 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:04,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:04,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f436a49-461f-4bc4-9480-9b9450d34e9e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:47:04,793 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash 987381808, now seen corresponding path program 2 times [2022-11-23 14:47:04,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:04,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359890718] [2022-11-23 14:47:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:04,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms