./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI --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 7d6844ab51374c8e656234daa6d7df2c3927c38bae9fcbeafc3fadf6f3b893b1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:30:32,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:30:32,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:30:32,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:30:32,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:30:32,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:30:32,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:30:32,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:30:32,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:30:32,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:30:32,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:30:32,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:30:32,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:30:32,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:30:32,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:30:32,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:30:32,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:30:32,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:30:32,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:30:32,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:30:32,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:30:32,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:30:32,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:30:32,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:30:32,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:30:32,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:30:32,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:30:32,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:30:32,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:30:32,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:30:32,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:30:32,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:30:32,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:30:32,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:30:32,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:30:32,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:30:32,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:30:32,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:30:32,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:30:32,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:30:32,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:30:32,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:30:32,740 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:30:32,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:30:32,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:30:32,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:30:32,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:30:32,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:30:32,742 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:30:32,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:30:32,743 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:30:32,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:30:32,744 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:30:32,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:30:32,745 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:30:32,745 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:30:32,745 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:30:32,745 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:30:32,745 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:30:32,746 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:30:32,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:30:32,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:30:32,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:30:32,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:30:32,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:30:32,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:30:32,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:30:32,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:30:32,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:30:32,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:30:32,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:30:32,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:30:32,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:30:32,749 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:30:32,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:30:32,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:30:32,750 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:30:32,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:30:32,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:30:32,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:30:32,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d6844ab51374c8e656234daa6d7df2c3927c38bae9fcbeafc3fadf6f3b893b1 [2022-11-03 03:30:33,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:30:33,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:30:33,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:30:33,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:30:33,096 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:30:33,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2022-11-03 03:30:33,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/data/9ac632f14/1456394b30ae4da69efc62af7276f89a/FLAGbdf21dfb9 [2022-11-03 03:30:33,992 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:30:33,993 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2022-11-03 03:30:34,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/data/9ac632f14/1456394b30ae4da69efc62af7276f89a/FLAGbdf21dfb9 [2022-11-03 03:30:34,092 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/data/9ac632f14/1456394b30ae4da69efc62af7276f89a [2022-11-03 03:30:34,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:30:34,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:30:34,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:30:34,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:30:34,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:30:34,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:30:34" (1/1) ... [2022-11-03 03:30:34,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f52017c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:34, skipping insertion in model container [2022-11-03 03:30:34,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:30:34" (1/1) ... [2022-11-03 03:30:34,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:30:34,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:30:35,185 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_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i[132927,132940] [2022-11-03 03:30:35,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:30:35,404 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:30:35,649 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_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i[132927,132940] [2022-11-03 03:30:35,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:30:35,879 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:30:35,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35 WrapperNode [2022-11-03 03:30:35,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:30:35,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:30:35,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:30:35,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:30:35,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,249 INFO L138 Inliner]: procedures = 133, calls = 4943, calls flagged for inlining = 57, calls inlined = 51, statements flattened = 6018 [2022-11-03 03:30:36,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:30:36,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:30:36,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:30:36,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:30:36,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:30:36,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:30:36,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:30:36,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:30:36,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (1/1) ... [2022-11-03 03:30:36,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:30:36,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:36,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:30:36,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:30:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_while_busy [2022-11-03 03:30:36,760 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_while_busy [2022-11-03 03:30:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-03 03:30:36,760 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-03 03:30:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_for_read [2022-11-03 03:30:36,760 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_for_read [2022-11-03 03:30:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-03 03:30:36,761 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-03 03:30:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2022-11-03 03:30:36,761 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2022-11-03 03:30:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure dmi_get_system_info [2022-11-03 03:30:36,761 INFO L138 BoogieDeclarations]: Found implementation of procedure dmi_get_system_info [2022-11-03 03:30:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:30:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read [2022-11-03 03:30:36,762 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read [2022-11-03 03:30:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:30:36,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:30:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:30:36,762 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 03:30:36,762 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 03:30:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:30:36,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:30:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-03 03:30:36,763 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-03 03:30:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2022-11-03 03:30:36,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2022-11-03 03:30:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_suspend [2022-11-03 03:30:36,764 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_suspend [2022-11-03 03:30:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read_increment_offset [2022-11-03 03:30:36,764 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read_increment_offset [2022-11-03 03:30:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:30:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2022-11-03 03:30:36,764 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2022-11-03 03:30:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 03:30:36,765 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 03:30:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:30:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:30:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:30:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_update_device [2022-11-03 03:30:36,766 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_update_device [2022-11-03 03:30:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:30:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:30:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure platform_set_drvdata [2022-11-03 03:30:36,766 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_set_drvdata [2022-11-03 03:30:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:30:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2022-11-03 03:30:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2022-11-03 03:30:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-11-03 03:30:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-03 03:30:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-03 03:30:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-03 03:30:36,768 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-03 03:30:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:30:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-03 03:30:36,768 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-03 03:30:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:30:36,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:30:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_resume [2022-11-03 03:30:36,769 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_resume [2022-11-03 03:30:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 03:30:36,769 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 03:30:37,155 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:30:37,158 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:30:49,464 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:30:50,939 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:30:50,940 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:30:50,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:30:50 BoogieIcfgContainer [2022-11-03 03:30:50,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:30:50,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:30:50,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:30:50,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:30:50,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:30:34" (1/3) ... [2022-11-03 03:30:50,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98dae0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:30:50, skipping insertion in model container [2022-11-03 03:30:50,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:35" (2/3) ... [2022-11-03 03:30:50,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98dae0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:30:50, skipping insertion in model container [2022-11-03 03:30:50,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:30:50" (3/3) ... [2022-11-03 03:30:50,957 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--abituguru3.ko-main.cil.out.i [2022-11-03 03:30:50,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:30:50,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:30:51,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:30:51,089 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d801493, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:30:51,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:30:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 221 states have (on average 1.4434389140271493) internal successors, (319), 230 states have internal predecessors, (319), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 03:30:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:30:51,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:51,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:51,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2017984917, now seen corresponding path program 1 times [2022-11-03 03:30:51,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251034302] [2022-11-03 03:30:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:53,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:53,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251034302] [2022-11-03 03:30:53,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251034302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:53,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:53,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655218450] [2022-11-03 03:30:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:53,091 INFO L87 Difference]: Start difference. First operand has 325 states, 221 states have (on average 1.4434389140271493) internal successors, (319), 230 states have internal predecessors, (319), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:55,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:56,090 INFO L93 Difference]: Finished difference Result 918 states and 1364 transitions. [2022-11-03 03:30:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:30:56,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-03 03:30:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:56,110 INFO L225 Difference]: With dead ends: 918 [2022-11-03 03:30:56,110 INFO L226 Difference]: Without dead ends: 592 [2022-11-03 03:30:56,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:56,120 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 442 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:56,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 777 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 03:30:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-03 03:30:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 588. [2022-11-03 03:30:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 399 states have (on average 1.4285714285714286) internal successors, (570), 409 states have internal predecessors, (570), 143 states have call successors, (143), 46 states have call predecessors, (143), 45 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-03 03:30:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 851 transitions. [2022-11-03 03:30:56,288 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 851 transitions. Word has length 15 [2022-11-03 03:30:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:56,289 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 851 transitions. [2022-11-03 03:30:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 851 transitions. [2022-11-03 03:30:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:30:56,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:56,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:56,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:30:56,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 678116288, now seen corresponding path program 1 times [2022-11-03 03:30:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:56,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010348398] [2022-11-03 03:30:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:56,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:57,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:57,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010348398] [2022-11-03 03:30:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010348398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:57,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:57,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:30:57,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028547677] [2022-11-03 03:30:57,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:57,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:30:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:30:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:30:57,276 INFO L87 Difference]: Start difference. First operand 588 states and 851 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:00,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:00,440 INFO L93 Difference]: Finished difference Result 1435 states and 2059 transitions. [2022-11-03 03:31:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-03 03:31:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:00,457 INFO L225 Difference]: With dead ends: 1435 [2022-11-03 03:31:00,466 INFO L226 Difference]: Without dead ends: 848 [2022-11-03 03:31:00,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:00,475 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 397 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:00,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 829 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 03:31:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-11-03 03:31:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 821. [2022-11-03 03:31:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 561 states have (on average 1.4206773618538324) internal successors, (797), 575 states have internal predecessors, (797), 192 states have call successors, (192), 68 states have call predecessors, (192), 67 states have return successors, (187), 186 states have call predecessors, (187), 187 states have call successors, (187) [2022-11-03 03:31:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1176 transitions. [2022-11-03 03:31:00,590 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1176 transitions. Word has length 26 [2022-11-03 03:31:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:00,590 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1176 transitions. [2022-11-03 03:31:00,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1176 transitions. [2022-11-03 03:31:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:31:00,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:00,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:00,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:31:00,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1631597949, now seen corresponding path program 1 times [2022-11-03 03:31:00,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:00,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431323123] [2022-11-03 03:31:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:01,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431323123] [2022-11-03 03:31:01,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431323123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:01,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:31:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136890485] [2022-11-03 03:31:01,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:01,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:01,558 INFO L87 Difference]: Start difference. First operand 821 states and 1176 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:04,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:04,575 INFO L93 Difference]: Finished difference Result 1427 states and 2038 transitions. [2022-11-03 03:31:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-03 03:31:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:04,585 INFO L225 Difference]: With dead ends: 1427 [2022-11-03 03:31:04,586 INFO L226 Difference]: Without dead ends: 1424 [2022-11-03 03:31:04,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:04,588 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 448 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:04,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 828 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:31:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-11-03 03:31:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1375. [2022-11-03 03:31:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 940 states have (on average 1.421276595744681) internal successors, (1336), 960 states have internal predecessors, (1336), 320 states have call successors, (320), 115 states have call predecessors, (320), 114 states have return successors, (315), 314 states have call predecessors, (315), 315 states have call successors, (315) [2022-11-03 03:31:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 1971 transitions. [2022-11-03 03:31:04,690 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 1971 transitions. Word has length 27 [2022-11-03 03:31:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:04,690 INFO L495 AbstractCegarLoop]: Abstraction has 1375 states and 1971 transitions. [2022-11-03 03:31:04,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 1971 transitions. [2022-11-03 03:31:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:31:04,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:04,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:04,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:31:04,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 959887067, now seen corresponding path program 1 times [2022-11-03 03:31:04,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:04,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401600134] [2022-11-03 03:31:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:04,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:05,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401600134] [2022-11-03 03:31:05,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401600134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:05,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:05,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:31:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780900824] [2022-11-03 03:31:05,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:05,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:05,719 INFO L87 Difference]: Start difference. First operand 1375 states and 1971 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:08,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:08,642 INFO L93 Difference]: Finished difference Result 1383 states and 1978 transitions. [2022-11-03 03:31:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-03 03:31:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:08,651 INFO L225 Difference]: With dead ends: 1383 [2022-11-03 03:31:08,651 INFO L226 Difference]: Without dead ends: 1380 [2022-11-03 03:31:08,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:08,653 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 445 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:08,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 831 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 03:31:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-11-03 03:31:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1376. [2022-11-03 03:31:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 941 states have (on average 1.4208289054197663) internal successors, (1337), 961 states have internal predecessors, (1337), 320 states have call successors, (320), 115 states have call predecessors, (320), 114 states have return successors, (315), 314 states have call predecessors, (315), 315 states have call successors, (315) [2022-11-03 03:31:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1972 transitions. [2022-11-03 03:31:08,734 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1972 transitions. Word has length 28 [2022-11-03 03:31:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:08,734 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1972 transitions. [2022-11-03 03:31:08,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1972 transitions. [2022-11-03 03:31:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 03:31:08,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:08,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:08,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:31:08,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash -308451194, now seen corresponding path program 1 times [2022-11-03 03:31:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:08,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846495482] [2022-11-03 03:31:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:09,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846495482] [2022-11-03 03:31:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846495482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:09,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:09,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:31:09,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001986828] [2022-11-03 03:31:09,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:09,732 INFO L87 Difference]: Start difference. First operand 1376 states and 1972 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:12,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:12,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:12,792 INFO L93 Difference]: Finished difference Result 3504 states and 5031 transitions. [2022-11-03 03:31:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-03 03:31:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:12,809 INFO L225 Difference]: With dead ends: 3504 [2022-11-03 03:31:12,809 INFO L226 Difference]: Without dead ends: 2333 [2022-11-03 03:31:12,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:12,821 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 385 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:12,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 803 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:31:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-11-03 03:31:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2324. [2022-11-03 03:31:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 1583 states have (on average 1.4137713202779532) internal successors, (2238), 1630 states have internal predecessors, (2238), 554 states have call successors, (554), 200 states have call predecessors, (554), 186 states have return successors, (542), 523 states have call predecessors, (542), 542 states have call successors, (542) [2022-11-03 03:31:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3334 transitions. [2022-11-03 03:31:13,020 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3334 transitions. Word has length 29 [2022-11-03 03:31:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:13,020 INFO L495 AbstractCegarLoop]: Abstraction has 2324 states and 3334 transitions. [2022-11-03 03:31:13,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3334 transitions. [2022-11-03 03:31:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:31:13,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:13,023 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:31:13,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:31:13,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1546619824, now seen corresponding path program 1 times [2022-11-03 03:31:13,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:13,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985995879] [2022-11-03 03:31:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:13,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:31:15,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:15,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985995879] [2022-11-03 03:31:15,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985995879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:15,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:15,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:31:15,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27998331] [2022-11-03 03:31:15,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:15,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:31:15,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:31:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:31:15,099 INFO L87 Difference]: Start difference. First operand 2324 states and 3334 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:17,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:18,131 INFO L93 Difference]: Finished difference Result 4388 states and 6281 transitions. [2022-11-03 03:31:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:31:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-11-03 03:31:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:18,145 INFO L225 Difference]: With dead ends: 4388 [2022-11-03 03:31:18,145 INFO L226 Difference]: Without dead ends: 2358 [2022-11-03 03:31:18,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:18,154 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 25 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:18,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1153 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:31:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-11-03 03:31:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2330. [2022-11-03 03:31:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1589 states have (on average 1.4096916299559472) internal successors, (2240), 1636 states have internal predecessors, (2240), 554 states have call successors, (554), 200 states have call predecessors, (554), 186 states have return successors, (542), 523 states have call predecessors, (542), 542 states have call successors, (542) [2022-11-03 03:31:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3336 transitions. [2022-11-03 03:31:18,363 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3336 transitions. Word has length 47 [2022-11-03 03:31:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:18,363 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3336 transitions. [2022-11-03 03:31:18,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3336 transitions. [2022-11-03 03:31:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 03:31:18,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:18,365 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:31:18,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:31:18,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:18,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1861011057, now seen corresponding path program 1 times [2022-11-03 03:31:18,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:18,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304594519] [2022-11-03 03:31:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:18,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:31:19,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304594519] [2022-11-03 03:31:19,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304594519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:19,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:19,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:31:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084597533] [2022-11-03 03:31:19,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:19,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:19,504 INFO L87 Difference]: Start difference. First operand 2330 states and 3336 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:22,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:22,576 INFO L93 Difference]: Finished difference Result 4400 states and 6285 transitions. [2022-11-03 03:31:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:31:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-11-03 03:31:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:22,589 INFO L225 Difference]: With dead ends: 4400 [2022-11-03 03:31:22,589 INFO L226 Difference]: Without dead ends: 2357 [2022-11-03 03:31:22,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:31:22,598 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 38 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:22,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1522 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 353 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:31:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-03 03:31:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2323. [2022-11-03 03:31:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 1584 states have (on average 1.4078282828282829) internal successors, (2230), 1631 states have internal predecessors, (2230), 553 states have call successors, (553), 199 states have call predecessors, (553), 185 states have return successors, (541), 522 states have call predecessors, (541), 541 states have call successors, (541) [2022-11-03 03:31:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3324 transitions. [2022-11-03 03:31:22,802 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3324 transitions. Word has length 52 [2022-11-03 03:31:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:22,803 INFO L495 AbstractCegarLoop]: Abstraction has 2323 states and 3324 transitions. [2022-11-03 03:31:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3324 transitions. [2022-11-03 03:31:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 03:31:22,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:22,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:22,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:31:22,807 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:22,809 INFO L85 PathProgramCache]: Analyzing trace with hash -343369989, now seen corresponding path program 1 times [2022-11-03 03:31:22,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:22,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421353889] [2022-11-03 03:31:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:31:24,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:24,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421353889] [2022-11-03 03:31:24,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421353889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:24,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:24,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:31:24,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30854589] [2022-11-03 03:31:24,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:31:24,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:31:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:31:24,409 INFO L87 Difference]: Start difference. First operand 2323 states and 3324 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:31:27,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:28,019 INFO L93 Difference]: Finished difference Result 5722 states and 8243 transitions. [2022-11-03 03:31:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:31:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-11-03 03:31:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:28,043 INFO L225 Difference]: With dead ends: 5722 [2022-11-03 03:31:28,043 INFO L226 Difference]: Without dead ends: 3695 [2022-11-03 03:31:28,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:28,054 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 635 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:28,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 1803 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 463 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 03:31:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-11-03 03:31:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3135. [2022-11-03 03:31:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 2148 states have (on average 1.4092178770949721) internal successors, (3027), 2207 states have internal predecessors, (3027), 739 states have call successors, (739), 265 states have call predecessors, (739), 247 states have return successors, (727), 704 states have call predecessors, (727), 727 states have call successors, (727) [2022-11-03 03:31:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4493 transitions. [2022-11-03 03:31:28,316 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4493 transitions. Word has length 59 [2022-11-03 03:31:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:28,316 INFO L495 AbstractCegarLoop]: Abstraction has 3135 states and 4493 transitions. [2022-11-03 03:31:28,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:31:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4493 transitions. [2022-11-03 03:31:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 03:31:28,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:28,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:28,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:31:28,320 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash 227430871, now seen corresponding path program 1 times [2022-11-03 03:31:28,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:28,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660215977] [2022-11-03 03:31:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:28,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:31:29,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:29,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660215977] [2022-11-03 03:31:29,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660215977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:29,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:29,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:31:29,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90516845] [2022-11-03 03:31:29,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:29,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:31:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:31:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:29,098 INFO L87 Difference]: Start difference. First operand 3135 states and 4493 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:31:31,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:32,208 INFO L93 Difference]: Finished difference Result 6665 states and 9543 transitions. [2022-11-03 03:31:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:31:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 74 [2022-11-03 03:31:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:32,227 INFO L225 Difference]: With dead ends: 6665 [2022-11-03 03:31:32,227 INFO L226 Difference]: Without dead ends: 3531 [2022-11-03 03:31:32,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:31:32,243 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 166 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:32,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 824 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:31:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2022-11-03 03:31:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 3209. [2022-11-03 03:31:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2241 states have (on average 1.432842481035252) internal successors, (3211), 2306 states have internal predecessors, (3211), 714 states have call successors, (714), 277 states have call predecessors, (714), 253 states have return successors, (696), 661 states have call predecessors, (696), 696 states have call successors, (696) [2022-11-03 03:31:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 4621 transitions. [2022-11-03 03:31:32,498 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 4621 transitions. Word has length 74 [2022-11-03 03:31:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:32,498 INFO L495 AbstractCegarLoop]: Abstraction has 3209 states and 4621 transitions. [2022-11-03 03:31:32,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:31:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 4621 transitions. [2022-11-03 03:31:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 03:31:32,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:32,502 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:31:32,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:31:32,502 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:32,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1357689551, now seen corresponding path program 1 times [2022-11-03 03:31:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:32,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932603408] [2022-11-03 03:31:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:31:35,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:35,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932603408] [2022-11-03 03:31:35,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932603408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:35,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104705036] [2022-11-03 03:31:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:35,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:35,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:35,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:35,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:31:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 12135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:31:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:31:37,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:37,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104705036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:37,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:37,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-11-03 03:31:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099228763] [2022-11-03 03:31:37,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:37,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:31:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:31:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:31:37,863 INFO L87 Difference]: Start difference. First operand 3209 states and 4621 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 03:31:42,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:31:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:42,897 INFO L93 Difference]: Finished difference Result 8065 states and 11938 transitions. [2022-11-03 03:31:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:31:42,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-11-03 03:31:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:42,923 INFO L225 Difference]: With dead ends: 8065 [2022-11-03 03:31:42,924 INFO L226 Difference]: Without dead ends: 4868 [2022-11-03 03:31:42,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:31:42,936 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 488 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2410 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:42,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2410 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 595 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 03:31:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2022-11-03 03:31:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 3221. [2022-11-03 03:31:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2253 states have (on average 1.4318686196182868) internal successors, (3226), 2318 states have internal predecessors, (3226), 714 states have call successors, (714), 277 states have call predecessors, (714), 253 states have return successors, (696), 661 states have call predecessors, (696), 696 states have call successors, (696) [2022-11-03 03:31:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 4636 transitions. [2022-11-03 03:31:43,250 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 4636 transitions. Word has length 70 [2022-11-03 03:31:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:43,250 INFO L495 AbstractCegarLoop]: Abstraction has 3221 states and 4636 transitions. [2022-11-03 03:31:43,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 03:31:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 4636 transitions. [2022-11-03 03:31:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 03:31:43,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:43,253 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:31:43,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:43,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:31:43,468 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:43,469 INFO L85 PathProgramCache]: Analyzing trace with hash -762987342, now seen corresponding path program 1 times [2022-11-03 03:31:43,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:43,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355194925] [2022-11-03 03:31:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:31:46,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:46,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355194925] [2022-11-03 03:31:46,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355194925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:46,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497713023] [2022-11-03 03:31:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:46,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:46,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:46,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc854558-2c0c-4fef-a5d7-bc7c72ddc76a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:31:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 12206 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:31:48,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:31:51,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:31:54,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497713023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422207990] [2022-11-03 03:31:54,307 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2022-11-03 03:31:54,308 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:54,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:54,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:54,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs