./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0 --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 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 --- 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-e04fb08 [2022-11-16 20:00:29,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:00:29,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:00:29,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:00:29,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:00:29,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:00:29,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:00:29,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:00:29,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:00:29,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:00:29,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:00:29,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:00:29,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:00:29,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:00:29,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:00:29,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:00:29,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:00:29,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:00:29,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:00:29,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:00:29,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:00:29,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:00:29,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:00:29,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:00:29,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:00:29,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:00:29,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:00:29,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:00:29,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:00:29,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:00:29,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:00:29,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:00:29,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:00:29,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:00:29,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:00:29,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:00:29,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:00:29,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:00:29,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:00:29,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:00:29,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:00:29,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 20:00:29,223 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:00:29,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:00:29,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:00:29,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:00:29,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:00:29,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:00:29,226 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:00:29,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:00:29,226 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:00:29,227 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:00:29,228 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:00:29,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:00:29,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:00:29,229 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:00:29,229 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:00:29,229 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:00:29,229 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:00:29,230 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:00:29,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:00:29,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:00:29,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:00:29,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:00:29,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:00:29,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:00:29,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:00:29,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:00:29,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:00:29,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:00:29,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:00:29,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:00:29,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:00:29,236 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:00:29,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:00:29,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:00:29,236 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:00:29,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:00:29,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:00:29,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:00:29,237 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_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2022-11-16 20:00:29,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:00:29,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:00:29,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:00:29,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:00:29,565 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:00:29,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2022-11-16 20:00:29,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/data/0c1bce804/2c86c82a114645c0bcc3fbcd56a7229a/FLAG9c413c701 [2022-11-16 20:00:30,428 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:00:30,428 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2022-11-16 20:00:30,475 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/data/0c1bce804/2c86c82a114645c0bcc3fbcd56a7229a/FLAG9c413c701 [2022-11-16 20:00:30,989 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/data/0c1bce804/2c86c82a114645c0bcc3fbcd56a7229a [2022-11-16 20:00:30,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:00:30,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:00:30,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:00:30,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:00:31,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:00:31,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:30" (1/1) ... [2022-11-16 20:00:31,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0fdca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:31, skipping insertion in model container [2022-11-16 20:00:31,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:30" (1/1) ... [2022-11-16 20:00:31,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:00:31,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:00:32,694 WARN L229 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_ef3dc4d4-229d-4288-9430-6beaebc5f32f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2022-11-16 20:00:32,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:00:32,792 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:00:33,194 WARN L229 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_ef3dc4d4-229d-4288-9430-6beaebc5f32f/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2022-11-16 20:00:33,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:00:33,379 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:00:33,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33 WrapperNode [2022-11-16 20:00:33,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:00:33,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:00:33,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:00:33,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:00:33,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,594 INFO L138 Inliner]: procedures = 176, calls = 1205, calls flagged for inlining = 84, calls inlined = 81, statements flattened = 2575 [2022-11-16 20:00:33,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:00:33,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:00:33,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:00:33,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:00:33,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:00:33,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:00:33,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:00:33,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:00:33,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (1/1) ... [2022-11-16 20:00:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:00:33,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:00:33,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:00:33,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:00:33,957 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2022-11-16 20:00:33,957 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2022-11-16 20:00:33,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-16 20:00:33,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-16 20:00:33,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:00:33,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-16 20:00:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-16 20:00:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-16 20:00:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-16 20:00:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-16 20:00:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-16 20:00:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-16 20:00:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-16 20:00:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-16 20:00:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-16 20:00:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 20:00:33,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 20:00:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-16 20:00:33,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-16 20:00:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-16 20:00:33,959 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-16 20:00:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-16 20:00:33,959 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-16 20:00:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:00:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2022-11-16 20:00:33,959 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2022-11-16 20:00:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 20:00:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 20:00:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 20:00:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 20:00:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-16 20:00:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-16 20:00:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:00:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:00:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-16 20:00:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-16 20:00:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:00:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2022-11-16 20:00:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2022-11-16 20:00:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:00:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-16 20:00:33,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-16 20:00:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2022-11-16 20:00:33,963 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2022-11-16 20:00:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:00:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:00:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2022-11-16 20:00:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2022-11-16 20:00:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2022-11-16 20:00:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2022-11-16 20:00:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-11-16 20:00:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-11-16 20:00:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:00:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-16 20:00:33,968 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-16 20:00:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-16 20:00:33,968 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-16 20:00:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2022-11-16 20:00:33,969 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2022-11-16 20:00:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2022-11-16 20:00:33,969 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2022-11-16 20:00:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2022-11-16 20:00:33,970 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2022-11-16 20:00:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-16 20:00:33,970 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-16 20:00:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-16 20:00:33,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-16 20:00:33,970 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2022-11-16 20:00:33,971 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2022-11-16 20:00:33,971 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-16 20:00:33,971 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-16 20:00:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2022-11-16 20:00:33,972 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2022-11-16 20:00:33,972 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2022-11-16 20:00:33,972 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2022-11-16 20:00:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:00:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 20:00:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2022-11-16 20:00:33,973 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2022-11-16 20:00:33,973 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-16 20:00:33,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-16 20:00:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-16 20:00:33,974 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-16 20:00:33,974 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-16 20:00:33,974 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-16 20:00:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-16 20:00:33,975 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-16 20:00:33,975 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-16 20:00:33,976 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-16 20:00:33,976 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-16 20:00:33,976 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-16 20:00:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-16 20:00:33,977 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-16 20:00:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2022-11-16 20:00:33,978 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2022-11-16 20:00:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:00:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2022-11-16 20:00:33,978 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2022-11-16 20:00:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:00:33,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:00:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2022-11-16 20:00:33,979 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2022-11-16 20:00:34,589 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:00:34,594 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:00:35,151 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-16 20:00:41,388 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:00:42,067 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:00:42,068 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 20:00:42,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:00:42 BoogieIcfgContainer [2022-11-16 20:00:42,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:00:42,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:00:42,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:00:42,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:00:42,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:00:30" (1/3) ... [2022-11-16 20:00:42,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24569b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:42, skipping insertion in model container [2022-11-16 20:00:42,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:33" (2/3) ... [2022-11-16 20:00:42,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24569b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:42, skipping insertion in model container [2022-11-16 20:00:42,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:00:42" (3/3) ... [2022-11-16 20:00:42,090 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2022-11-16 20:00:42,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:00:42,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:00:42,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:00:42,220 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;@7127aaf9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:00:42,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:00:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 676 states, 393 states have (on average 1.3944020356234097) internal successors, (548), 431 states have internal predecessors, (548), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-16 20:00:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-16 20:00:42,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:42,263 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:42,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2080705277, now seen corresponding path program 1 times [2022-11-16 20:00:42,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:42,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702620608] [2022-11-16 20:00:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:42,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 20:00:43,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:43,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702620608] [2022-11-16 20:00:43,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702620608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:00:43,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:00:43,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:00:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748991859] [2022-11-16 20:00:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:00:43,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:00:43,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:43,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:00:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:43,693 INFO L87 Difference]: Start difference. First operand has 676 states, 393 states have (on average 1.3944020356234097) internal successors, (548), 431 states have internal predecessors, (548), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:00:45,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:00:47,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:00:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:50,410 INFO L93 Difference]: Finished difference Result 2575 states and 3893 transitions. [2022-11-16 20:00:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:00:50,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 147 [2022-11-16 20:00:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:50,441 INFO L225 Difference]: With dead ends: 2575 [2022-11-16 20:00:50,441 INFO L226 Difference]: Without dead ends: 1875 [2022-11-16 20:00:50,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:50,458 INFO L413 NwaCegarLoop]: 1509 mSDtfsCounter, 1841 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1841 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:50,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1841 Valid, 3516 Invalid, 840 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 832 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-16 20:00:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-11-16 20:00:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1861. [2022-11-16 20:00:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1086 states have (on average 1.3664825046040516) internal successors, (1484), 1172 states have internal predecessors, (1484), 651 states have call successors, (651), 124 states have call predecessors, (651), 123 states have return successors, (650), 623 states have call predecessors, (650), 650 states have call successors, (650) [2022-11-16 20:00:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2785 transitions. [2022-11-16 20:00:50,712 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2785 transitions. Word has length 147 [2022-11-16 20:00:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:50,713 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 2785 transitions. [2022-11-16 20:00:50,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:00:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2785 transitions. [2022-11-16 20:00:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-16 20:00:50,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:50,728 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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] [2022-11-16 20:00:50,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:00:50,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash -133495553, now seen corresponding path program 1 times [2022-11-16 20:00:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:50,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219648500] [2022-11-16 20:00:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 20:00:51,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:51,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219648500] [2022-11-16 20:00:51,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219648500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:00:51,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:00:51,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:00:51,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365349102] [2022-11-16 20:00:51,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:00:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:00:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:00:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:51,353 INFO L87 Difference]: Start difference. First operand 1861 states and 2785 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:00:53,390 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 [] [2022-11-16 20:00:55,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:00:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:58,956 INFO L93 Difference]: Finished difference Result 7314 states and 10942 transitions. [2022-11-16 20:00:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:00:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 148 [2022-11-16 20:00:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:58,995 INFO L225 Difference]: With dead ends: 7314 [2022-11-16 20:00:58,996 INFO L226 Difference]: Without dead ends: 5465 [2022-11-16 20:00:59,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:00:59,009 INFO L413 NwaCegarLoop]: 1628 mSDtfsCounter, 2152 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 369 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:59,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 2906 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 775 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-16 20:00:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2022-11-16 20:00:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5451. [2022-11-16 20:00:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5451 states, 3180 states have (on average 1.3641509433962264) internal successors, (4338), 3430 states have internal predecessors, (4338), 1907 states have call successors, (1907), 364 states have call predecessors, (1907), 363 states have return successors, (1906), 1829 states have call predecessors, (1906), 1906 states have call successors, (1906) [2022-11-16 20:00:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 8151 transitions. [2022-11-16 20:00:59,489 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 8151 transitions. Word has length 148 [2022-11-16 20:00:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:59,490 INFO L495 AbstractCegarLoop]: Abstraction has 5451 states and 8151 transitions. [2022-11-16 20:00:59,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:00:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 8151 transitions. [2022-11-16 20:00:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-16 20:00:59,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:59,509 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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] [2022-11-16 20:00:59,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:00:59,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1231549835, now seen corresponding path program 1 times [2022-11-16 20:00:59,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:59,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562590102] [2022-11-16 20:00:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:59,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 20:01:00,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:00,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562590102] [2022-11-16 20:01:00,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562590102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:00,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:00,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:01:00,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617031992] [2022-11-16 20:01:00,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:00,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:01:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:01:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:01:00,090 INFO L87 Difference]: Start difference. First operand 5451 states and 8151 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:01:02,127 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 [] [2022-11-16 20:01:04,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:01:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:07,564 INFO L93 Difference]: Finished difference Result 21662 states and 32382 transitions. [2022-11-16 20:01:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:01:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 149 [2022-11-16 20:01:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:07,662 INFO L225 Difference]: With dead ends: 21662 [2022-11-16 20:01:07,663 INFO L226 Difference]: Without dead ends: 16223 [2022-11-16 20:01:07,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:01:07,697 INFO L413 NwaCegarLoop]: 1632 mSDtfsCounter, 1795 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:01:07,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 3795 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 879 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 20:01:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16223 states. [2022-11-16 20:01:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16223 to 16209. [2022-11-16 20:01:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16209 states, 9462 states have (on average 1.361868526738533) internal successors, (12886), 10192 states have internal predecessors, (12886), 5663 states have call successors, (5663), 1084 states have call predecessors, (5663), 1083 states have return successors, (5662), 5447 states have call predecessors, (5662), 5662 states have call successors, (5662) [2022-11-16 20:01:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16209 states to 16209 states and 24211 transitions. [2022-11-16 20:01:09,097 INFO L78 Accepts]: Start accepts. Automaton has 16209 states and 24211 transitions. Word has length 149 [2022-11-16 20:01:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:09,100 INFO L495 AbstractCegarLoop]: Abstraction has 16209 states and 24211 transitions. [2022-11-16 20:01:09,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:01:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 16209 states and 24211 transitions. [2022-11-16 20:01:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-16 20:01:09,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:09,119 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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] [2022-11-16 20:01:09,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:01:09,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:09,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2088799497, now seen corresponding path program 1 times [2022-11-16 20:01:09,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:09,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746554669] [2022-11-16 20:01:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:09,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 20:01:09,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:09,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746554669] [2022-11-16 20:01:09,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746554669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:09,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:09,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:01:09,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151270093] [2022-11-16 20:01:09,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:09,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:01:09,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:01:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:01:09,603 INFO L87 Difference]: Start difference. First operand 16209 states and 24211 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:01:11,641 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 [] [2022-11-16 20:01:13,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:01:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:17,782 INFO L93 Difference]: Finished difference Result 62066 states and 92518 transitions. [2022-11-16 20:01:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:01:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 150 [2022-11-16 20:01:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:18,039 INFO L225 Difference]: With dead ends: 62066 [2022-11-16 20:01:18,040 INFO L226 Difference]: Without dead ends: 45869 [2022-11-16 20:01:18,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:01:18,120 INFO L413 NwaCegarLoop]: 1654 mSDtfsCounter, 1794 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:01:18,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 3817 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 887 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 20:01:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45869 states. [2022-11-16 20:01:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45869 to 45801. [2022-11-16 20:01:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45801 states, 26798 states have (on average 1.3582356892305396) internal successors, (36398), 28692 states have internal predecessors, (36398), 15871 states have call successors, (15871), 3132 states have call predecessors, (15871), 3131 states have return successors, (15870), 15309 states have call predecessors, (15870), 15870 states have call successors, (15870) [2022-11-16 20:01:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45801 states to 45801 states and 68139 transitions. [2022-11-16 20:01:22,243 INFO L78 Accepts]: Start accepts. Automaton has 45801 states and 68139 transitions. Word has length 150 [2022-11-16 20:01:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:22,244 INFO L495 AbstractCegarLoop]: Abstraction has 45801 states and 68139 transitions. [2022-11-16 20:01:22,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 20:01:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 45801 states and 68139 transitions. [2022-11-16 20:01:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-16 20:01:22,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:22,305 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:01:22,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:01:22,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:22,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1226617914, now seen corresponding path program 1 times [2022-11-16 20:01:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:22,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630857717] [2022-11-16 20:01:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-16 20:01:22,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:22,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630857717] [2022-11-16 20:01:22,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630857717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:22,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:22,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:01:22,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388974455] [2022-11-16 20:01:22,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:22,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:01:22,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:22,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:01:22,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:01:22,860 INFO L87 Difference]: Start difference. First operand 45801 states and 68139 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-16 20:01:25,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:01:27,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:01:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:31,687 INFO L93 Difference]: Finished difference Result 133852 states and 199454 transitions. [2022-11-16 20:01:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:01:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 183 [2022-11-16 20:01:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:32,299 INFO L225 Difference]: With dead ends: 133852 [2022-11-16 20:01:32,299 INFO L226 Difference]: Without dead ends: 88063 [2022-11-16 20:01:32,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:01:32,471 INFO L413 NwaCegarLoop]: 1234 mSDtfsCounter, 839 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:01:32,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 2110 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 20:01:32,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88063 states. [2022-11-16 20:01:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88063 to 88060. [2022-11-16 20:01:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88060 states, 51290 states have (on average 1.3566972119321505) internal successors, (69585), 54998 states have internal predecessors, (69585), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2022-11-16 20:01:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88060 states to 88060 states and 131250 transitions. [2022-11-16 20:01:38,308 INFO L78 Accepts]: Start accepts. Automaton has 88060 states and 131250 transitions. Word has length 183 [2022-11-16 20:01:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:38,309 INFO L495 AbstractCegarLoop]: Abstraction has 88060 states and 131250 transitions. [2022-11-16 20:01:38,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-16 20:01:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 88060 states and 131250 transitions. [2022-11-16 20:01:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-16 20:01:38,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:38,431 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:01:38,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:01:38,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:38,432 INFO L85 PathProgramCache]: Analyzing trace with hash 70467267, now seen corresponding path program 1 times [2022-11-16 20:01:38,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:38,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970337398] [2022-11-16 20:01:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 20:01:39,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970337398] [2022-11-16 20:01:39,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970337398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:39,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:39,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:01:39,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491345906] [2022-11-16 20:01:39,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:39,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:01:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:01:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:01:39,570 INFO L87 Difference]: Start difference. First operand 88060 states and 131250 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 20:01:41,605 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 [] [2022-11-16 20:01:43,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:01:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:47,985 INFO L93 Difference]: Finished difference Result 112683 states and 169147 transitions. [2022-11-16 20:01:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:01:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 205 [2022-11-16 20:01:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:48,358 INFO L225 Difference]: With dead ends: 112683 [2022-11-16 20:01:48,359 INFO L226 Difference]: Without dead ends: 94520 [2022-11-16 20:01:48,456 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 [2022-11-16 20:01:48,457 INFO L413 NwaCegarLoop]: 1225 mSDtfsCounter, 271 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:01:48,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 2170 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-16 20:01:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94520 states. [2022-11-16 20:01:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94520 to 88062. [2022-11-16 20:01:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88062 states, 51292 states have (on average 1.3566833034391328) internal successors, (69587), 55000 states have internal predecessors, (69587), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2022-11-16 20:01:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88062 states to 88062 states and 131252 transitions. [2022-11-16 20:01:53,737 INFO L78 Accepts]: Start accepts. Automaton has 88062 states and 131252 transitions. Word has length 205 [2022-11-16 20:01:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:53,738 INFO L495 AbstractCegarLoop]: Abstraction has 88062 states and 131252 transitions. [2022-11-16 20:01:53,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 20:01:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 88062 states and 131252 transitions. [2022-11-16 20:01:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-16 20:01:53,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:53,827 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:01:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:01:53,827 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2017328729, now seen corresponding path program 1 times [2022-11-16 20:01:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321702991] [2022-11-16 20:01:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:53,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-16 20:01:54,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321702991] [2022-11-16 20:01:54,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321702991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:54,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:54,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:01:54,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064259246] [2022-11-16 20:01:54,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:54,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:01:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:01:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:01:54,409 INFO L87 Difference]: Start difference. First operand 88062 states and 131252 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 20:01:56,449 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 [] [2022-11-16 20:01:58,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:02:02,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:02,879 INFO L93 Difference]: Finished difference Result 112668 states and 169119 transitions. [2022-11-16 20:02:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:02:02,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 207 [2022-11-16 20:02:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:03,260 INFO L225 Difference]: With dead ends: 112668 [2022-11-16 20:02:03,260 INFO L226 Difference]: Without dead ends: 94503 [2022-11-16 20:02:03,349 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 [2022-11-16 20:02:03,350 INFO L413 NwaCegarLoop]: 1220 mSDtfsCounter, 254 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:03,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 2154 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-16 20:02:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94503 states. [2022-11-16 20:02:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94503 to 88065. [2022-11-16 20:02:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88065 states, 51295 states have (on average 1.35666244273321) internal successors, (69590), 55003 states have internal predecessors, (69590), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2022-11-16 20:02:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88065 states to 88065 states and 131255 transitions. [2022-11-16 20:02:08,057 INFO L78 Accepts]: Start accepts. Automaton has 88065 states and 131255 transitions. Word has length 207 [2022-11-16 20:02:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:08,058 INFO L495 AbstractCegarLoop]: Abstraction has 88065 states and 131255 transitions. [2022-11-16 20:02:08,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 20:02:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 88065 states and 131255 transitions. [2022-11-16 20:02:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-16 20:02:08,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:08,139 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:02:08,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:02:08,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:02:08,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1770755146, now seen corresponding path program 1 times [2022-11-16 20:02:08,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:08,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691034381] [2022-11-16 20:02:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-16 20:02:09,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691034381] [2022-11-16 20:02:09,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691034381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:02:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427376615] [2022-11-16 20:02:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:09,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:09,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:09,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:09,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef3dc4d4-229d-4288-9430-6beaebc5f32f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process