./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-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7 --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 e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:02:14,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:02:14,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:02:14,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:02:14,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:02:14,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:02:14,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:02:14,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:02:14,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:02:14,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:02:14,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:02:14,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:02:14,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:02:14,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:02:14,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:02:14,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:02:14,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:02:14,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:02:14,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:02:14,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:02:14,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:02:14,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:02:14,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:02:14,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:02:14,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:02:14,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:02:14,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:02:14,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:02:14,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:02:14,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:02:14,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:02:14,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:02:14,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:02:14,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:02:14,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:02:14,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:02:14,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:02:14,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:02:14,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:02:14,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:02:14,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:02:14,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:02:14,360 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:02:14,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:02:14,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:02:14,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:02:14,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:02:14,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:02:14,369 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:02:14,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:02:14,369 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:02:14,370 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:02:14,371 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:02:14,371 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:02:14,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:02:14,372 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:02:14,372 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:02:14,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:02:14,372 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:02:14,373 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:02:14,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:02:14,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:02:14,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:02:14,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:02:14,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:02:14,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:02:14,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:02:14,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:02:14,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:02:14,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:02:14,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:02:14,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:02:14,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:02:14,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:02:14,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:02:14,379 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:02:14,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:02:14,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:02:14,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:02:14,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:02:14,380 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c477e3f3753c58922818522be04156e728e59c50f004b5ce835b763e4b3e35 [2021-11-25 19:02:14,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:02:14,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:02:14,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:02:14,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:02:14,705 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:02:14,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-25 19:02:14,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/data/d94f81b21/2f1636ea1144418fae6b42ab1b508b9b/FLAG1f0198a99 [2021-11-25 19:02:15,544 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:02:15,547 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-25 19:02:15,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/data/d94f81b21/2f1636ea1144418fae6b42ab1b508b9b/FLAG1f0198a99 [2021-11-25 19:02:15,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/data/d94f81b21/2f1636ea1144418fae6b42ab1b508b9b [2021-11-25 19:02:15,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:02:15,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:02:15,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:02:15,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:02:15,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:02:15,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:02:15" (1/1) ... [2021-11-25 19:02:15,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf004e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:15, skipping insertion in model container [2021-11-25 19:02:15,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:02:15" (1/1) ... [2021-11-25 19:02:15,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:02:15,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:02:17,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-25 19:02:17,767 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-25 19:02:17,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:02:17,839 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:02:18,154 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2021-11-25 19:02:18,161 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-25 19:02:18,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:02:18,302 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:02:18,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18 WrapperNode [2021-11-25 19:02:18,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:02:18,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:02:18,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:02:18,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:02:18,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,489 INFO L137 Inliner]: procedures = 212, calls = 1352, calls flagged for inlining = 108, calls inlined = 105, statements flattened = 3704 [2021-11-25 19:02:18,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:02:18,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:02:18,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:02:18,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:02:18,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:02:18,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:02:18,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:02:18,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:02:18,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (1/1) ... [2021-11-25 19:02:18,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:02:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:18,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:02:18,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:02:18,884 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 19:02:18,885 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 19:02:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 19:02:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 19:02:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 19:02:18,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 19:02:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 19:02:18,886 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 19:02:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_sensor_show [2021-11-25 19:02:18,886 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_sensor_show [2021-11-25 19:02:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:02:18,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:02:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2021-11-25 19:02:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2021-11-25 19:02:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 19:02:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 19:02:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 19:02:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 19:02:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:02:18,888 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:02:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:02:18,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:02:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu_suspend [2021-11-25 19:02:18,889 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu_suspend [2021-11-25 19:02:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 19:02:18,889 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 19:02:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure iio_trigger_notify_done [2021-11-25 19:02:18,890 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_trigger_notify_done [2021-11-25 19:02:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:02:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:02:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 19:02:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 19:02:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 19:02:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_irq_handler [2021-11-25 19:02:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_irq_handler [2021-11-25 19:02:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 19:02:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 19:02:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure iio_triggered_buffer_cleanup [2021-11-25 19:02:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_triggered_buffer_cleanup [2021-11-25 19:02:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure inv_attr_show [2021-11-25 19:02:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_attr_show [2021-11-25 19:02:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:02:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-25 19:02:18,893 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-25 19:02:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:02:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_remove_trigger [2021-11-25 19:02:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_remove_trigger [2021-11-25 19:02:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-25 19:02:18,895 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-25 19:02:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 19:02:18,896 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 19:02:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_read_fifo [2021-11-25 19:02:18,897 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_read_fifo [2021-11-25 19:02:18,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 19:02:18,897 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_set_power_itg [2021-11-25 19:02:18,897 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_set_power_itg [2021-11-25 19:02:18,897 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-25 19:02:18,897 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-25 19:02:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2021-11-25 19:02:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2021-11-25 19:02:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu_resume [2021-11-25 19:02:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu_resume [2021-11-25 19:02:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 19:02:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:02:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_switch_engine [2021-11-25 19:02:18,899 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_switch_engine [2021-11-25 19:02:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure to_acpi_node [2021-11-25 19:02:18,899 INFO L138 BoogieDeclarations]: Found implementation of procedure to_acpi_node [2021-11-25 19:02:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-11-25 19:02:18,899 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-11-25 19:02:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 19:02:18,900 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 19:02:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure iio_priv [2021-11-25 19:02:18,900 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_priv [2021-11-25 19:02:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure iio_device_unregister [2021-11-25 19:02:18,901 INFO L138 BoogieDeclarations]: Found implementation of procedure iio_device_unregister [2021-11-25 19:02:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:02:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_2 [2021-11-25 19:02:18,902 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_2 [2021-11-25 19:02:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 19:02:18,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 19:02:18,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:02:18,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 19:02:18,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 19:02:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:02:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:02:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-25 19:02:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-25 19:02:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-11-25 19:02:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-11-25 19:02:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_validate_trigger [2021-11-25 19:02:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_validate_trigger [2021-11-25 19:02:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_del_mux_adapter [2021-11-25 19:02:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_del_mux_adapter [2021-11-25 19:02:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_i2c_block_data [2021-11-25 19:02:18,907 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_i2c_block_data [2021-11-25 19:02:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_iio_dev [2021-11-25 19:02:18,907 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_iio_dev [2021-11-25 19:02:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure inv_reset_fifo [2021-11-25 19:02:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_reset_fifo [2021-11-25 19:02:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-25 19:02:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-25 19:02:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:02:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:02:18,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:02:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure inv_mpu6050_write_reg [2021-11-25 19:02:18,909 INFO L138 BoogieDeclarations]: Found implementation of procedure inv_mpu6050_write_reg [2021-11-25 19:02:19,528 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:02:19,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:02:19,711 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 19:02:49,519 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:02:50,474 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:02:50,474 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:02:50,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:02:50 BoogieIcfgContainer [2021-11-25 19:02:50,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:02:50,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:02:50,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:02:50,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:02:50,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:02:15" (1/3) ... [2021-11-25 19:02:50,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0b68fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:02:50, skipping insertion in model container [2021-11-25 19:02:50,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:18" (2/3) ... [2021-11-25 19:02:50,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0b68fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:02:50, skipping insertion in model container [2021-11-25 19:02:50,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:02:50" (3/3) ... [2021-11-25 19:02:50,498 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2021-11-25 19:02:50,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:02:50,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:02:50,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:02:50,580 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:02:50,580 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:02:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 777 states, 526 states have (on average 1.44106463878327) internal successors, (758), 541 states have internal predecessors, (758), 205 states have call successors, (205), 45 states have call predecessors, (205), 44 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-25 19:02:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-25 19:02:50,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:50,664 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:50,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1181361072, now seen corresponding path program 1 times [2021-11-25 19:02:50,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:50,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069178214] [2021-11-25 19:02:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:50,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-25 19:02:51,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:51,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069178214] [2021-11-25 19:02:51,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069178214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:51,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:51,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:02:51,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318764042] [2021-11-25 19:02:51,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:51,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:02:51,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:02:51,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:02:51,744 INFO L87 Difference]: Start difference. First operand has 777 states, 526 states have (on average 1.44106463878327) internal successors, (758), 541 states have internal predecessors, (758), 205 states have call successors, (205), 45 states have call predecessors, (205), 44 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-25 19:02:53,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:02:56,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:02:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:57,048 INFO L93 Difference]: Finished difference Result 2103 states and 3136 transitions. [2021-11-25 19:02:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:02:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 243 [2021-11-25 19:02:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:57,081 INFO L225 Difference]: With dead ends: 2103 [2021-11-25 19:02:57,081 INFO L226 Difference]: Without dead ends: 1343 [2021-11-25 19:02:57,095 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:02:57,098 INFO L933 BasicCegarLoop]: 1161 mSDtfsCounter, 865 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2169 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:57,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2169 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 19:02:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-25 19:02:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1342. [2021-11-25 19:02:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 932 states have (on average 1.4313304721030042) internal successors, (1334), 937 states have internal predecessors, (1334), 328 states have call successors, (328), 82 states have call predecessors, (328), 81 states have return successors, (327), 326 states have call predecessors, (327), 327 states have call successors, (327) [2021-11-25 19:02:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1989 transitions. [2021-11-25 19:02:57,276 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1989 transitions. Word has length 243 [2021-11-25 19:02:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:57,280 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1989 transitions. [2021-11-25 19:02:57,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-25 19:02:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1989 transitions. [2021-11-25 19:02:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-25 19:02:57,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:57,291 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:57,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:02:57,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:57,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1184533604, now seen corresponding path program 1 times [2021-11-25 19:02:57,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:57,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131238577] [2021-11-25 19:02:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:57,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-25 19:02:57,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:57,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131238577] [2021-11-25 19:02:57,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131238577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:57,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:57,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:02:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075437506] [2021-11-25 19:02:57,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:57,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:02:57,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:02:57,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:02:57,944 INFO L87 Difference]: Start difference. First operand 1342 states and 1989 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:02:59,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:02,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:03,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:03,119 INFO L93 Difference]: Finished difference Result 2519 states and 3729 transitions. [2021-11-25 19:03:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 246 [2021-11-25 19:03:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:03,143 INFO L225 Difference]: With dead ends: 2519 [2021-11-25 19:03:03,143 INFO L226 Difference]: Without dead ends: 2514 [2021-11-25 19:03:03,145 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:03:03,147 INFO L933 BasicCegarLoop]: 1141 mSDtfsCounter, 883 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:03,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 2075 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 19:03:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-11-25 19:03:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2513. [2021-11-25 19:03:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 1755 states have (on average 1.4370370370370371) internal successors, (2522), 1764 states have internal predecessors, (2522), 600 states have call successors, (600), 158 states have call predecessors, (600), 157 states have return successors, (599), 596 states have call predecessors, (599), 599 states have call successors, (599) [2021-11-25 19:03:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3721 transitions. [2021-11-25 19:03:03,296 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3721 transitions. Word has length 246 [2021-11-25 19:03:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:03,297 INFO L470 AbstractCegarLoop]: Abstraction has 2513 states and 3721 transitions. [2021-11-25 19:03:03,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 19:03:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3721 transitions. [2021-11-25 19:03:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-25 19:03:03,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:03,383 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:03,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:03:03,383 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 924706173, now seen corresponding path program 1 times [2021-11-25 19:03:03,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:03,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835714393] [2021-11-25 19:03:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:03,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-11-25 19:03:03,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:03,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835714393] [2021-11-25 19:03:03,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835714393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:03,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:03,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:03:03,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878353767] [2021-11-25 19:03:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:03,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:03,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:03,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:03:03,867 INFO L87 Difference]: Start difference. First operand 2513 states and 3721 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:03:05,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:08,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:09,184 INFO L93 Difference]: Finished difference Result 7150 states and 10615 transitions. [2021-11-25 19:03:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:09,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 275 [2021-11-25 19:03:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:09,221 INFO L225 Difference]: With dead ends: 7150 [2021-11-25 19:03:09,221 INFO L226 Difference]: Without dead ends: 4678 [2021-11-25 19:03:09,232 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:03:09,236 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 806 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:09,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2120 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 19:03:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-11-25 19:03:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4671. [2021-11-25 19:03:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3291 states have (on average 1.4457611668185961) internal successors, (4758), 3306 states have internal predecessors, (4758), 1094 states have call successors, (1094), 286 states have call predecessors, (1094), 285 states have return successors, (1093), 1088 states have call predecessors, (1093), 1093 states have call successors, (1093) [2021-11-25 19:03:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 6945 transitions. [2021-11-25 19:03:09,482 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 6945 transitions. Word has length 275 [2021-11-25 19:03:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:09,486 INFO L470 AbstractCegarLoop]: Abstraction has 4671 states and 6945 transitions. [2021-11-25 19:03:09,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:03:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 6945 transitions. [2021-11-25 19:03:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-25 19:03:09,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:09,503 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 19:03:09,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:03:09,504 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1733748406, now seen corresponding path program 1 times [2021-11-25 19:03:09,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:09,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368610407] [2021-11-25 19:03:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:09,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2021-11-25 19:03:10,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:10,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368610407] [2021-11-25 19:03:10,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368610407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:10,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:10,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:03:10,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967006704] [2021-11-25 19:03:10,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:10,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:10,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:03:10,335 INFO L87 Difference]: Start difference. First operand 4671 states and 6945 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 19:03:12,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:14,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:15,766 INFO L93 Difference]: Finished difference Result 7049 states and 10485 transitions. [2021-11-25 19:03:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:15,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 363 [2021-11-25 19:03:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:15,826 INFO L225 Difference]: With dead ends: 7049 [2021-11-25 19:03:15,827 INFO L226 Difference]: Without dead ends: 7044 [2021-11-25 19:03:15,832 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:03:15,836 INFO L933 BasicCegarLoop]: 1200 mSDtfsCounter, 1039 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 2135 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2021-11-25 19:03:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7044 states. [2021-11-25 19:03:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7044 to 7041. [2021-11-25 19:03:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 4964 states have (on average 1.4462127316680096) internal successors, (7179), 4988 states have internal predecessors, (7179), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-25 19:03:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10472 transitions. [2021-11-25 19:03:16,278 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10472 transitions. Word has length 363 [2021-11-25 19:03:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:16,279 INFO L470 AbstractCegarLoop]: Abstraction has 7041 states and 10472 transitions. [2021-11-25 19:03:16,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 19:03:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10472 transitions. [2021-11-25 19:03:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-11-25 19:03:16,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:16,314 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:16,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:03:16,314 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:16,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1860719267, now seen corresponding path program 1 times [2021-11-25 19:03:16,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:16,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385879511] [2021-11-25 19:03:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:16,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2212 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2191 trivial. 0 not checked. [2021-11-25 19:03:16,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385879511] [2021-11-25 19:03:16,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385879511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:16,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:16,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:03:16,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022409941] [2021-11-25 19:03:16,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:16,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:16,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:03:16,921 INFO L87 Difference]: Start difference. First operand 7041 states and 10472 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-25 19:03:18,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:21,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:22,229 INFO L93 Difference]: Finished difference Result 14089 states and 21259 transitions. [2021-11-25 19:03:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 416 [2021-11-25 19:03:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:22,288 INFO L225 Difference]: With dead ends: 14089 [2021-11-25 19:03:22,288 INFO L226 Difference]: Without dead ends: 7089 [2021-11-25 19:03:22,316 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:03:22,317 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 10 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:22,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1992 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 19:03:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2021-11-25 19:03:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 7065. [2021-11-25 19:03:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 4988 states have (on average 1.444065757818765) internal successors, (7203), 5012 states have internal predecessors, (7203), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-25 19:03:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 10496 transitions. [2021-11-25 19:03:22,681 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 10496 transitions. Word has length 416 [2021-11-25 19:03:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:22,683 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 10496 transitions. [2021-11-25 19:03:22,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-25 19:03:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 10496 transitions. [2021-11-25 19:03:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-25 19:03:22,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:22,720 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:22,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:03:22,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1778118758, now seen corresponding path program 1 times [2021-11-25 19:03:22,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:22,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847993023] [2021-11-25 19:03:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:22,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2193 trivial. 0 not checked. [2021-11-25 19:03:23,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:23,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847993023] [2021-11-25 19:03:23,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847993023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:23,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:23,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:03:23,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769635427] [2021-11-25 19:03:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:23,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:03:23,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:23,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:03:23,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:03:23,520 INFO L87 Difference]: Start difference. First operand 7065 states and 10496 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 19:03:25,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:28,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:30,453 INFO L93 Difference]: Finished difference Result 14710 states and 22689 transitions. [2021-11-25 19:03:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:03:30,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 420 [2021-11-25 19:03:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:30,541 INFO L225 Difference]: With dead ends: 14710 [2021-11-25 19:03:30,541 INFO L226 Difference]: Without dead ends: 12322 [2021-11-25 19:03:30,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:03:30,557 INFO L933 BasicCegarLoop]: 2452 mSDtfsCounter, 1073 mSDsluCounter, 3597 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 193 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 5669 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:30,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 5669 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 728 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-11-25 19:03:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12322 states. [2021-11-25 19:03:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12322 to 7067. [2021-11-25 19:03:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7067 states, 4990 states have (on average 1.4438877755511021) internal successors, (7205), 5014 states have internal predecessors, (7205), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-25 19:03:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7067 states to 7067 states and 10498 transitions. [2021-11-25 19:03:30,987 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 10498 transitions. Word has length 420 [2021-11-25 19:03:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:30,988 INFO L470 AbstractCegarLoop]: Abstraction has 7067 states and 10498 transitions. [2021-11-25 19:03:30,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 19:03:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 10498 transitions. [2021-11-25 19:03:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-11-25 19:03:31,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:31,023 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:31,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:03:31,023 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1524580602, now seen corresponding path program 1 times [2021-11-25 19:03:31,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:31,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55722763] [2021-11-25 19:03:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:31,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2191 trivial. 0 not checked. [2021-11-25 19:03:31,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55722763] [2021-11-25 19:03:31,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55722763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001803109] [2021-11-25 19:03:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:31,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:31,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:31,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:03:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:33,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 6033 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:03:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 2183 trivial. 0 not checked. [2021-11-25 19:03:34,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:34,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001803109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:34,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:34,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 19:03:34,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397351583] [2021-11-25 19:03:34,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:34,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:03:34,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:03:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:03:34,764 INFO L87 Difference]: Start difference. First operand 7067 states and 10498 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-25 19:03:36,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:40,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:42,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:44,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:46,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:46,052 INFO L93 Difference]: Finished difference Result 19642 states and 30422 transitions. [2021-11-25 19:03:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:03:46,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 428 [2021-11-25 19:03:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:46,119 INFO L225 Difference]: With dead ends: 19642 [2021-11-25 19:03:46,119 INFO L226 Difference]: Without dead ends: 14874 [2021-11-25 19:03:46,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:03:46,148 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 1571 mSDsluCounter, 3382 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 174 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 4691 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:46,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1742 Valid, 4691 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 632 Invalid, 4 Unknown, 0 Unchecked, 10.9s Time] [2021-11-25 19:03:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14874 states. [2021-11-25 19:03:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14874 to 7071. [2021-11-25 19:03:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 4994 states have (on average 1.4435322386864238) internal successors, (7209), 5018 states have internal predecessors, (7209), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 429 states have return successors, (1646), 1638 states have call predecessors, (1646), 1646 states have call successors, (1646) [2021-11-25 19:03:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 10502 transitions. [2021-11-25 19:03:46,771 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 10502 transitions. Word has length 428 [2021-11-25 19:03:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:46,773 INFO L470 AbstractCegarLoop]: Abstraction has 7071 states and 10502 transitions. [2021-11-25 19:03:46,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-25 19:03:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 10502 transitions. [2021-11-25 19:03:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-25 19:03:46,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:46,819 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:46,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:47,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:03:47,039 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2139687374, now seen corresponding path program 1 times [2021-11-25 19:03:47,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:47,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672200311] [2021-11-25 19:03:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:47,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2224 trivial. 0 not checked. [2021-11-25 19:03:47,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:47,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672200311] [2021-11-25 19:03:47,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672200311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:47,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982764964] [2021-11-25 19:03:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:47,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:47,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:47,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:48,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:03:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:49,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 6466 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:03:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2021-11-25 19:03:51,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:51,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982764964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:51,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:51,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 19:03:51,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99804899] [2021-11-25 19:03:51,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:51,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:03:51,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:03:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:03:51,038 INFO L87 Difference]: Start difference. First operand 7071 states and 10502 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-25 19:03:53,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:56,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:03:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:57,494 INFO L93 Difference]: Finished difference Result 14488 states and 22106 transitions. [2021-11-25 19:03:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:03:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) Word has length 478 [2021-11-25 19:03:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:57,538 INFO L225 Difference]: With dead ends: 14488 [2021-11-25 19:03:57,538 INFO L226 Difference]: Without dead ends: 9716 [2021-11-25 19:03:57,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:03:57,561 INFO L933 BasicCegarLoop]: 1509 mSDtfsCounter, 411 mSDsluCounter, 4628 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 5595 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:57,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 5595 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 761 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-25 19:03:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9716 states. [2021-11-25 19:03:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9716 to 7079. [2021-11-25 19:03:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 5000 states have (on average 1.443) internal successors, (7215), 5024 states have internal predecessors, (7215), 1647 states have call successors, (1647), 430 states have call predecessors, (1647), 431 states have return successors, (1674), 1640 states have call predecessors, (1674), 1646 states have call successors, (1674) [2021-11-25 19:03:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 10536 transitions. [2021-11-25 19:03:57,945 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 10536 transitions. Word has length 478 [2021-11-25 19:03:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:57,946 INFO L470 AbstractCegarLoop]: Abstraction has 7079 states and 10536 transitions. [2021-11-25 19:03:57,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (52), 2 states have call predecessors, (52), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-25 19:03:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 10536 transitions. [2021-11-25 19:03:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-25 19:03:57,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:57,989 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:58,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:58,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:58,203 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1263044046, now seen corresponding path program 2 times [2021-11-25 19:03:58,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:58,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785290518] [2021-11-25 19:03:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:58,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 2220 trivial. 0 not checked. [2021-11-25 19:03:59,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785290518] [2021-11-25 19:03:59,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785290518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580091025] [2021-11-25 19:03:59,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:03:59,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:59,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:59,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:59,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_012d5feb-f52a-4145-9ee8-2c3e1ece705a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process