./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:14:41,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:14:41,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:14:42,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:14:42,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:14:42,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:14:42,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:14:42,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:14:42,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:14:42,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:14:42,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:14:42,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:14:42,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:14:42,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:14:42,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:14:42,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:14:42,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:14:42,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:14:42,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:14:42,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:14:42,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:14:42,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:14:42,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:14:42,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:14:42,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:14:42,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:14:42,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:14:42,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:14:42,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:14:42,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:14:42,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:14:42,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:14:42,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:14:42,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:14:42,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:14:42,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:14:42,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:14:42,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:14:42,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:14:42,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:14:42,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:14:42,096 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:14:42,156 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:14:42,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:14:42,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:14:42,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:14:42,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:14:42,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:14:42,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:14:42,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:14:42,188 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:14:42,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:14:42,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:14:42,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:14:42,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:14:42,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:14:42,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:14:42,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:14:42,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:14:42,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:14:42,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:14:42,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:14:42,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:14:42,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:42,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:14:42,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:14:42,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:14:42,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:14:42,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:14:42,195 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:14:42,196 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:14:42,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:14:42,196 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_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2022-11-16 12:14:42,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:14:42,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:14:42,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:14:42,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:14:42,616 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:14:42,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-16 12:14:42,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/data/89a5364b1/7f7f548f6cf04d7792848a4c86cbcf3b/FLAG60f411bda [2022-11-16 12:14:43,830 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:14:43,835 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-16 12:14:43,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/data/89a5364b1/7f7f548f6cf04d7792848a4c86cbcf3b/FLAG60f411bda [2022-11-16 12:14:44,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/data/89a5364b1/7f7f548f6cf04d7792848a4c86cbcf3b [2022-11-16 12:14:44,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:14:44,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:14:44,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:44,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:14:44,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:14:44,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:44" (1/1) ... [2022-11-16 12:14:44,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685bf8c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:44, skipping insertion in model container [2022-11-16 12:14:44,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:44" (1/1) ... [2022-11-16 12:14:44,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:14:44,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:14:45,818 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-11-16 12:14:46,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:46,914 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:14:47,165 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-11-16 12:14:47,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:47,549 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:14:47,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47 WrapperNode [2022-11-16 12:14:47,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:47,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:47,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:14:47,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:14:47,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,881 INFO L138 Inliner]: procedures = 175, calls = 797, calls flagged for inlining = 84, calls inlined = 84, statements flattened = 2228 [2022-11-16 12:14:47,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:47,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:14:47,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:14:47,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:14:47,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,163 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:14:48,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:14:48,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:14:48,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:14:48,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:48,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:14:48,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:14:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-16 12:14:48,324 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-16 12:14:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-16 12:14:48,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-16 12:14:48,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-16 12:14:48,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-16 12:14:48,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2022-11-16 12:14:48,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2022-11-16 12:14:48,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 12:14:48,326 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-16 12:14:48,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-16 12:14:48,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 12:14:48,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 12:14:48,327 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-16 12:14:48,327 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-16 12:14:48,327 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-16 12:14:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-16 12:14:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:14:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-16 12:14:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-16 12:14:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-16 12:14:48,329 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-16 12:14:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-16 12:14:48,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-16 12:14:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 12:14:48,330 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 12:14:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-16 12:14:48,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-16 12:14:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 12:14:48,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 12:14:48,331 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-16 12:14:48,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-16 12:14:48,331 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2022-11-16 12:14:48,332 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2022-11-16 12:14:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-16 12:14:48,332 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-16 12:14:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-16 12:14:48,333 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-16 12:14:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:14:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 12:14:48,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 12:14:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 12:14:48,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 12:14:48,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 12:14:48,335 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 12:14:48,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:14:48,336 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:14:48,336 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-16 12:14:48,337 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-16 12:14:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:14:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-16 12:14:48,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-16 12:14:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-16 12:14:48,338 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-16 12:14:48,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:14:48,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-16 12:14:48,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-16 12:14:48,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:14:48,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:14:48,343 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-16 12:14:48,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-16 12:14:48,345 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-16 12:14:48,346 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-16 12:14:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-16 12:14:48,347 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-16 12:14:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:14:48,348 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-16 12:14:48,349 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-16 12:14:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-16 12:14:48,350 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-16 12:14:48,350 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-16 12:14:48,350 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-16 12:14:48,350 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2022-11-16 12:14:48,351 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2022-11-16 12:14:48,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:14:48,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:14:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2022-11-16 12:14:48,353 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2022-11-16 12:14:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-16 12:14:48,353 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-16 12:14:48,354 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-16 12:14:48,354 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-16 12:14:48,354 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-16 12:14:48,354 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-16 12:14:48,355 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-16 12:14:48,355 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-16 12:14:48,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-16 12:14:48,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-16 12:14:48,356 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-16 12:14:48,356 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-16 12:14:48,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:14:48,358 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-16 12:14:48,358 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-16 12:14:48,358 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-16 12:14:48,359 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-16 12:14:48,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 12:14:48,361 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2022-11-16 12:14:48,361 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2022-11-16 12:14:48,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-16 12:14:48,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-16 12:14:48,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:14:48,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:14:48,364 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2022-11-16 12:14:48,364 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2022-11-16 12:14:49,195 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:14:49,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:14:49,585 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-16 12:14:50,772 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-16 12:14:57,708 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:14:57,727 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:14:57,728 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 12:14:57,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:57 BoogieIcfgContainer [2022-11-16 12:14:57,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:14:57,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:14:57,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:14:57,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:14:57,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:14:44" (1/3) ... [2022-11-16 12:14:57,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c892445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:57, skipping insertion in model container [2022-11-16 12:14:57,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (2/3) ... [2022-11-16 12:14:57,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c892445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:57, skipping insertion in model container [2022-11-16 12:14:57,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:57" (3/3) ... [2022-11-16 12:14:57,757 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-11-16 12:14:57,792 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:14:57,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:14:57,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:14:57,977 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=PETRI_NET, 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;@234e3818, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:14:57,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:14:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 659 states, 483 states have (on average 1.339544513457557) internal successors, (647), 502 states have internal predecessors, (647), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2022-11-16 12:14:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 12:14:58,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:58,008 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:14:58,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:58,016 INFO L85 PathProgramCache]: Analyzing trace with hash -878443670, now seen corresponding path program 1 times [2022-11-16 12:14:58,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:58,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856364609] [2022-11-16 12:14:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:59,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:59,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:14:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:14:59,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:59,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856364609] [2022-11-16 12:14:59,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856364609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:59,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:59,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:14:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741430970] [2022-11-16 12:14:59,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:59,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:14:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:14:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:14:59,169 INFO L87 Difference]: Start difference. First operand has 659 states, 483 states have (on average 1.339544513457557) internal successors, (647), 502 states have internal predecessors, (647), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:15:01,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:05,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:06,646 INFO L93 Difference]: Finished difference Result 2039 states and 2896 transitions. [2022-11-16 12:15:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:15:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-16 12:15:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:06,706 INFO L225 Difference]: With dead ends: 2039 [2022-11-16 12:15:06,707 INFO L226 Difference]: Without dead ends: 1361 [2022-11-16 12:15:06,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:06,728 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 1137 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:06,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 1894 Invalid, 1122 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [346 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-16 12:15:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-11-16 12:15:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1255. [2022-11-16 12:15:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 929 states have (on average 1.3164693218514532) internal successors, (1223), 947 states have internal predecessors, (1223), 243 states have call successors, (243), 83 states have call predecessors, (243), 82 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) [2022-11-16 12:15:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1704 transitions. [2022-11-16 12:15:06,963 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1704 transitions. Word has length 28 [2022-11-16 12:15:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:06,964 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1704 transitions. [2022-11-16 12:15:06,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:15:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1704 transitions. [2022-11-16 12:15:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 12:15:06,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:06,970 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] [2022-11-16 12:15:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:15:06,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash 863297475, now seen corresponding path program 1 times [2022-11-16 12:15:06,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:06,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894039857] [2022-11-16 12:15:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:07,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:15:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:07,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:15:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:15:07,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894039857] [2022-11-16 12:15:07,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894039857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:07,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:07,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:15:07,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501867985] [2022-11-16 12:15:07,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:07,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:15:07,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:07,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:15:07,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:15:07,910 INFO L87 Difference]: Start difference. First operand 1255 states and 1704 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:10,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:15,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:16,486 INFO L93 Difference]: Finished difference Result 3962 states and 5495 transitions. [2022-11-16 12:15:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:15:16,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-11-16 12:15:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:16,514 INFO L225 Difference]: With dead ends: 3962 [2022-11-16 12:15:16,514 INFO L226 Difference]: Without dead ends: 2714 [2022-11-16 12:15:16,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:16,523 INFO L413 NwaCegarLoop]: 1129 mSDtfsCounter, 1047 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2304 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:16,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2304 Invalid, 1146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [292 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-16 12:15:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-11-16 12:15:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2492. [2022-11-16 12:15:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 1848 states have (on average 1.3149350649350648) internal successors, (2430), 1880 states have internal predecessors, (2430), 479 states have call successors, (479), 165 states have call predecessors, (479), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-16 12:15:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3397 transitions. [2022-11-16 12:15:16,783 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3397 transitions. Word has length 38 [2022-11-16 12:15:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:16,786 INFO L495 AbstractCegarLoop]: Abstraction has 2492 states and 3397 transitions. [2022-11-16 12:15:16,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3397 transitions. [2022-11-16 12:15:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:15:16,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:16,802 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] [2022-11-16 12:15:16,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:15:16,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash 992051553, now seen corresponding path program 1 times [2022-11-16 12:15:16,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:16,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479148202] [2022-11-16 12:15:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:15:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:15:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:15:17,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:17,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479148202] [2022-11-16 12:15:17,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479148202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:17,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:17,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:15:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029633411] [2022-11-16 12:15:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:17,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:15:17,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:17,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:15:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:15:17,550 INFO L87 Difference]: Start difference. First operand 2492 states and 3397 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:19,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:23,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:23,775 INFO L93 Difference]: Finished difference Result 2706 states and 3776 transitions. [2022-11-16 12:15:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:15:23,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-16 12:15:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:23,800 INFO L225 Difference]: With dead ends: 2706 [2022-11-16 12:15:23,800 INFO L226 Difference]: Without dead ends: 2703 [2022-11-16 12:15:23,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:23,805 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 964 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:23,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1102 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-16 12:15:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2022-11-16 12:15:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2491. [2022-11-16 12:15:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1848 states have (on average 1.3143939393939394) internal successors, (2429), 1879 states have internal predecessors, (2429), 478 states have call successors, (478), 165 states have call predecessors, (478), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-16 12:15:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3395 transitions. [2022-11-16 12:15:24,039 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3395 transitions. Word has length 39 [2022-11-16 12:15:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:24,040 INFO L495 AbstractCegarLoop]: Abstraction has 2491 states and 3395 transitions. [2022-11-16 12:15:24,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:24,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3395 transitions. [2022-11-16 12:15:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 12:15:24,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:24,046 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] [2022-11-16 12:15:24,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:15:24,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 688465542, now seen corresponding path program 1 times [2022-11-16 12:15:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:24,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586789914] [2022-11-16 12:15:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:24,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:24,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:15:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:24,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:15:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:15:24,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586789914] [2022-11-16 12:15:24,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586789914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:24,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:24,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:15:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396227214] [2022-11-16 12:15:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:24,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:15:24,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:15:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:15:24,476 INFO L87 Difference]: Start difference. First operand 2491 states and 3395 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:26,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:30,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:30,450 INFO L93 Difference]: Finished difference Result 2705 states and 3774 transitions. [2022-11-16 12:15:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:15:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-16 12:15:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:30,476 INFO L225 Difference]: With dead ends: 2705 [2022-11-16 12:15:30,476 INFO L226 Difference]: Without dead ends: 2702 [2022-11-16 12:15:30,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:30,481 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 959 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:30,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 1105 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 12:15:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2022-11-16 12:15:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2490. [2022-11-16 12:15:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1848 states have (on average 1.3138528138528138) internal successors, (2428), 1878 states have internal predecessors, (2428), 477 states have call successors, (477), 165 states have call predecessors, (477), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-16 12:15:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3393 transitions. [2022-11-16 12:15:30,732 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3393 transitions. Word has length 40 [2022-11-16 12:15:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:30,736 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3393 transitions. [2022-11-16 12:15:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3393 transitions. [2022-11-16 12:15:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 12:15:30,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:30,740 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] [2022-11-16 12:15:30,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:15:30,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash -132761340, now seen corresponding path program 1 times [2022-11-16 12:15:30,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:30,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959374617] [2022-11-16 12:15:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:30,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:31,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:15:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:31,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:15:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:15:31,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:31,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959374617] [2022-11-16 12:15:31,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959374617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:31,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:31,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:15:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109098397] [2022-11-16 12:15:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:31,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:15:31,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:15:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:15:31,074 INFO L87 Difference]: Start difference. First operand 2490 states and 3393 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:33,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:36,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:36,932 INFO L93 Difference]: Finished difference Result 2704 states and 3772 transitions. [2022-11-16 12:15:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:15:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-11-16 12:15:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:36,959 INFO L225 Difference]: With dead ends: 2704 [2022-11-16 12:15:36,960 INFO L226 Difference]: Without dead ends: 2701 [2022-11-16 12:15:36,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:36,965 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 958 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:36,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 1096 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 12:15:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-11-16 12:15:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2489. [2022-11-16 12:15:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 1848 states have (on average 1.3133116883116882) internal successors, (2427), 1877 states have internal predecessors, (2427), 476 states have call successors, (476), 165 states have call predecessors, (476), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-16 12:15:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 3391 transitions. [2022-11-16 12:15:37,272 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 3391 transitions. Word has length 41 [2022-11-16 12:15:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:37,273 INFO L495 AbstractCegarLoop]: Abstraction has 2489 states and 3391 transitions. [2022-11-16 12:15:37,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 3391 transitions. [2022-11-16 12:15:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:15:37,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:37,276 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] [2022-11-16 12:15:37,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:15:37,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash 179013961, now seen corresponding path program 1 times [2022-11-16 12:15:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:37,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959051718] [2022-11-16 12:15:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:15:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:15:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:15:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959051718] [2022-11-16 12:15:37,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959051718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:37,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:37,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:15:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35146131] [2022-11-16 12:15:37,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:37,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:15:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:15:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:15:37,539 INFO L87 Difference]: Start difference. First operand 2489 states and 3391 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:39,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:42,961 INFO L93 Difference]: Finished difference Result 2703 states and 3770 transitions. [2022-11-16 12:15:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:15:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-11-16 12:15:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:42,988 INFO L225 Difference]: With dead ends: 2703 [2022-11-16 12:15:42,989 INFO L226 Difference]: Without dead ends: 2691 [2022-11-16 12:15:42,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:42,994 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 955 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:42,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 1097 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-16 12:15:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-11-16 12:15:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2479. [2022-11-16 12:15:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 1839 states have (on average 1.3126699293094073) internal successors, (2414), 1867 states have internal predecessors, (2414), 475 states have call successors, (475), 165 states have call predecessors, (475), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-11-16 12:15:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3377 transitions. [2022-11-16 12:15:43,349 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3377 transitions. Word has length 42 [2022-11-16 12:15:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:43,352 INFO L495 AbstractCegarLoop]: Abstraction has 2479 states and 3377 transitions. [2022-11-16 12:15:43,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:15:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3377 transitions. [2022-11-16 12:15:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:15:43,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:43,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:43,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:15:43,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash 504205047, now seen corresponding path program 1 times [2022-11-16 12:15:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:43,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448722163] [2022-11-16 12:15:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:15:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:15:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:15:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:15:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:15:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:15:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:15:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:43,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448722163] [2022-11-16 12:15:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448722163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:43,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:43,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:15:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274036066] [2022-11-16 12:15:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:43,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:15:43,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:43,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:15:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:15:43,766 INFO L87 Difference]: Start difference. First operand 2479 states and 3377 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:15:48,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:49,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:54,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:56,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:58,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:15:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:59,165 INFO L93 Difference]: Finished difference Result 6060 states and 8291 transitions. [2022-11-16 12:15:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:15:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 82 [2022-11-16 12:15:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:59,196 INFO L225 Difference]: With dead ends: 6060 [2022-11-16 12:15:59,196 INFO L226 Difference]: Without dead ends: 3588 [2022-11-16 12:15:59,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:15:59,208 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 686 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:59,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 2336 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-11-16 12:15:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-11-16 12:15:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3272. [2022-11-16 12:15:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2436 states have (on average 1.2947454844006567) internal successors, (3154), 2472 states have internal predecessors, (3154), 598 states have call successors, (598), 232 states have call predecessors, (598), 237 states have return successors, (629), 595 states have call predecessors, (629), 597 states have call successors, (629) [2022-11-16 12:15:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 4381 transitions. [2022-11-16 12:15:59,627 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 4381 transitions. Word has length 82 [2022-11-16 12:15:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:59,627 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 4381 transitions. [2022-11-16 12:15:59,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 12:15:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 4381 transitions. [2022-11-16 12:15:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-16 12:15:59,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:59,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:15:59,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1260517544, now seen corresponding path program 1 times [2022-11-16 12:15:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801763845] [2022-11-16 12:15:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:59,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:15:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:15:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:15:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:15:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:15:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:15:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:15:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:59,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:59,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801763845] [2022-11-16 12:15:59,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801763845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:59,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:59,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:15:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949743178] [2022-11-16 12:15:59,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:59,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:15:59,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:59,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:15:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:15:59,995 INFO L87 Difference]: Start difference. First operand 3272 states and 4381 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:16:03,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:05,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:12,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:13,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:14,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:15,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:16,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:17,804 INFO L93 Difference]: Finished difference Result 7692 states and 10393 transitions. [2022-11-16 12:16:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:16:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 98 [2022-11-16 12:16:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:17,837 INFO L225 Difference]: With dead ends: 7692 [2022-11-16 12:16:17,838 INFO L226 Difference]: Without dead ends: 4434 [2022-11-16 12:16:17,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:16:17,853 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 632 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:17,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 2658 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2022-11-16 12:16:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2022-11-16 12:16:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4082. [2022-11-16 12:16:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4082 states, 3060 states have (on average 1.2862745098039217) internal successors, (3936), 3100 states have internal predecessors, (3936), 718 states have call successors, (718), 298 states have call predecessors, (718), 303 states have return successors, (749), 715 states have call predecessors, (749), 717 states have call successors, (749) [2022-11-16 12:16:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4082 states to 4082 states and 5403 transitions. [2022-11-16 12:16:18,360 INFO L78 Accepts]: Start accepts. Automaton has 4082 states and 5403 transitions. Word has length 98 [2022-11-16 12:16:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:18,361 INFO L495 AbstractCegarLoop]: Abstraction has 4082 states and 5403 transitions. [2022-11-16 12:16:18,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:16:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4082 states and 5403 transitions. [2022-11-16 12:16:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-16 12:16:18,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:18,369 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:18,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:16:18,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1570548632, now seen corresponding path program 1 times [2022-11-16 12:16:18,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:18,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713392575] [2022-11-16 12:16:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:18,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:18,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:18,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:16:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:18,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:16:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:18,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:16:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:18,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:16:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:18,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-16 12:16:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:16:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:16:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:16:19,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713392575] [2022-11-16 12:16:19,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713392575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022796290] [2022-11-16 12:16:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:19,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:19,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:19,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:19,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:16:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:16:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:16:20,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:16:20,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022796290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:20,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:16:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 12:16:20,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39399555] [2022-11-16 12:16:20,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:20,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:16:20,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:16:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:16:20,080 INFO L87 Difference]: Start difference. First operand 4082 states and 5403 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:16:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:20,905 INFO L93 Difference]: Finished difference Result 9832 states and 12970 transitions. [2022-11-16 12:16:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:16:20,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2022-11-16 12:16:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:20,959 INFO L225 Difference]: With dead ends: 9832 [2022-11-16 12:16:20,960 INFO L226 Difference]: Without dead ends: 5764 [2022-11-16 12:16:20,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:16:20,983 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 686 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:20,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1673 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2022-11-16 12:16:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 5756. [2022-11-16 12:16:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5756 states, 4340 states have (on average 1.294930875576037) internal successors, (5620), 4404 states have internal predecessors, (5620), 952 states have call successors, (952), 452 states have call predecessors, (952), 463 states have return successors, (997), 947 states have call predecessors, (997), 951 states have call successors, (997) [2022-11-16 12:16:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 7569 transitions. [2022-11-16 12:16:21,730 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 7569 transitions. Word has length 110 [2022-11-16 12:16:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:21,733 INFO L495 AbstractCegarLoop]: Abstraction has 5756 states and 7569 transitions. [2022-11-16 12:16:21,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:16:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 7569 transitions. [2022-11-16 12:16:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-16 12:16:21,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:21,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:21,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:16:21,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:16:21,955 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash -820473403, now seen corresponding path program 1 times [2022-11-16 12:16:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:21,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878610106] [2022-11-16 12:16:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:21,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:16:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:16:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:16:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:16:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:16:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:16:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:16:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:16:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:16:22,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:22,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878610106] [2022-11-16 12:16:22,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878610106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:22,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930308135] [2022-11-16 12:16:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:22,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:22,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:16:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:16:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:16:23,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:16:23,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930308135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:23,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:16:23,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-11-16 12:16:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841108349] [2022-11-16 12:16:23,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:16:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:16:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:16:23,736 INFO L87 Difference]: Start difference. First operand 5756 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:16:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:26,813 INFO L93 Difference]: Finished difference Result 17242 states and 22674 transitions. [2022-11-16 12:16:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:16:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-16 12:16:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:26,912 INFO L225 Difference]: With dead ends: 17242 [2022-11-16 12:16:26,912 INFO L226 Difference]: Without dead ends: 17234 [2022-11-16 12:16:26,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:16:26,923 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 2061 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2061 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:26,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2061 Valid, 2728 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 12:16:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17234 states. [2022-11-16 12:16:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17234 to 17204. [2022-11-16 12:16:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 12968 states have (on average 1.2956508328192473) internal successors, (16802), 13176 states have internal predecessors, (16802), 2848 states have call successors, (2848), 1352 states have call predecessors, (2848), 1387 states have return successors, (2985), 2819 states have call predecessors, (2985), 2847 states have call successors, (2985) [2022-11-16 12:16:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 22635 transitions. [2022-11-16 12:16:28,978 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 22635 transitions. Word has length 121 [2022-11-16 12:16:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:28,979 INFO L495 AbstractCegarLoop]: Abstraction has 17204 states and 22635 transitions. [2022-11-16 12:16:28,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:16:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 22635 transitions. [2022-11-16 12:16:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 12:16:29,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:29,005 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:29,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:29,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:16:29,216 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1046181982, now seen corresponding path program 1 times [2022-11-16 12:16:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:29,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304280923] [2022-11-16 12:16:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:16:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:16:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:16:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:16:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:16:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:16:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:16:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:16:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-16 12:16:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-16 12:16:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304280923] [2022-11-16 12:16:29,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304280923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990618656] [2022-11-16 12:16:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:29,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:30,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:16:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:16:30,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:16:31,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:16:31,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990618656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:31,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:16:31,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-16 12:16:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615840681] [2022-11-16 12:16:31,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:16:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:16:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:16:31,256 INFO L87 Difference]: Start difference. First operand 17204 states and 22635 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:16:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:32,781 INFO L93 Difference]: Finished difference Result 26220 states and 34492 transitions. [2022-11-16 12:16:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:16:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-11-16 12:16:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:32,827 INFO L225 Difference]: With dead ends: 26220 [2022-11-16 12:16:32,828 INFO L226 Difference]: Without dead ends: 8482 [2022-11-16 12:16:32,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:16:32,988 INFO L413 NwaCegarLoop]: 1034 mSDtfsCounter, 763 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:32,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 1287 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:16:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2022-11-16 12:16:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 8482. [2022-11-16 12:16:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 6387 states have (on average 1.2921559417566932) internal successors, (8253), 6491 states have internal predecessors, (8253), 1408 states have call successors, (1408), 669 states have call predecessors, (1408), 686 states have return successors, (1476), 1393 states have call predecessors, (1476), 1407 states have call successors, (1476) [2022-11-16 12:16:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 11137 transitions. [2022-11-16 12:16:33,972 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 11137 transitions. Word has length 131 [2022-11-16 12:16:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:33,973 INFO L495 AbstractCegarLoop]: Abstraction has 8482 states and 11137 transitions. [2022-11-16 12:16:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 12:16:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 11137 transitions. [2022-11-16 12:16:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 12:16:33,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:33,994 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:34,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:16:34,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:34,206 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:34,207 INFO L85 PathProgramCache]: Analyzing trace with hash 233374278, now seen corresponding path program 1 times [2022-11-16 12:16:34,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:34,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570030675] [2022-11-16 12:16:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:34,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:16:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:16:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:16:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:16:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:16:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:16:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:16:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:16:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 12:16:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570030675] [2022-11-16 12:16:34,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570030675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:34,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772002051] [2022-11-16 12:16:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:34,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:34,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:34,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:16:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:16:35,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 12:16:35,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:16:35,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772002051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:35,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:16:35,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 12:16:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071831959] [2022-11-16 12:16:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:35,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:16:35,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:16:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:16:35,859 INFO L87 Difference]: Start difference. First operand 8482 states and 11137 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-16 12:16:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:37,558 INFO L93 Difference]: Finished difference Result 16328 states and 21485 transitions. [2022-11-16 12:16:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:16:37,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 133 [2022-11-16 12:16:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:37,604 INFO L225 Difference]: With dead ends: 16328 [2022-11-16 12:16:37,604 INFO L226 Difference]: Without dead ends: 8490 [2022-11-16 12:16:37,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:16:37,636 INFO L413 NwaCegarLoop]: 1323 mSDtfsCounter, 676 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:37,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 2005 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:16:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8490 states. [2022-11-16 12:16:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8490 to 8482. [2022-11-16 12:16:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 6387 states have (on average 1.2888680131517145) internal successors, (8232), 6491 states have internal predecessors, (8232), 1408 states have call successors, (1408), 669 states have call predecessors, (1408), 686 states have return successors, (1476), 1393 states have call predecessors, (1476), 1407 states have call successors, (1476) [2022-11-16 12:16:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 11116 transitions. [2022-11-16 12:16:38,434 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 11116 transitions. Word has length 133 [2022-11-16 12:16:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:38,435 INFO L495 AbstractCegarLoop]: Abstraction has 8482 states and 11116 transitions. [2022-11-16 12:16:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-16 12:16:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 11116 transitions. [2022-11-16 12:16:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 12:16:38,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:38,452 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:38,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:38,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:38,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash 295413892, now seen corresponding path program 1 times [2022-11-16 12:16:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:38,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010461055] [2022-11-16 12:16:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:16:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:16:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:16:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:16:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:16:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:16:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:16:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 12:16:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:16:39,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:39,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010461055] [2022-11-16 12:16:39,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010461055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:39,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:39,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:16:39,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698651650] [2022-11-16 12:16:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:16:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:16:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:16:39,728 INFO L87 Difference]: Start difference. First operand 8482 states and 11116 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:16:42,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:46,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:47,537 INFO L93 Difference]: Finished difference Result 17198 states and 22891 transitions. [2022-11-16 12:16:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:16:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 133 [2022-11-16 12:16:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:47,604 INFO L225 Difference]: With dead ends: 17198 [2022-11-16 12:16:47,604 INFO L226 Difference]: Without dead ends: 9360 [2022-11-16 12:16:47,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:16:47,636 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 608 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 2599 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:47,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 2599 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-16 12:16:47,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2022-11-16 12:16:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 8524. [2022-11-16 12:16:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8524 states, 6417 states have (on average 1.2875175315568022) internal successors, (8262), 6521 states have internal predecessors, (8262), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2022-11-16 12:16:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8524 states to 8524 states and 11200 transitions. [2022-11-16 12:16:49,089 INFO L78 Accepts]: Start accepts. Automaton has 8524 states and 11200 transitions. Word has length 133 [2022-11-16 12:16:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:49,090 INFO L495 AbstractCegarLoop]: Abstraction has 8524 states and 11200 transitions. [2022-11-16 12:16:49,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 12:16:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 8524 states and 11200 transitions. [2022-11-16 12:16:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-16 12:16:49,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:49,109 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:49,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:16:49,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1488902701, now seen corresponding path program 1 times [2022-11-16 12:16:49,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:49,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135756147] [2022-11-16 12:16:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:49,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:16:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:16:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:16:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:16:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:16:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:16:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:16:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-16 12:16:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:16:51,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135756147] [2022-11-16 12:16:51,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135756147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:51,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:51,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:16:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773463613] [2022-11-16 12:16:51,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:16:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:16:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:16:51,956 INFO L87 Difference]: Start difference. First operand 8524 states and 11200 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 12:16:57,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:16:59,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:08,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:11,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:21,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:23,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:27,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:28,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:33,201 INFO L93 Difference]: Finished difference Result 22361 states and 30728 transitions. [2022-11-16 12:17:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:17:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 139 [2022-11-16 12:17:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:33,276 INFO L225 Difference]: With dead ends: 22361 [2022-11-16 12:17:33,276 INFO L226 Difference]: Without dead ends: 14481 [2022-11-16 12:17:33,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:17:33,301 INFO L413 NwaCegarLoop]: 1205 mSDtfsCounter, 3024 mSDsluCounter, 10738 mSDsCounter, 0 mSdLazyCounter, 9219 mSolverCounterSat, 1054 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3176 SdHoareTripleChecker+Valid, 11943 SdHoareTripleChecker+Invalid, 10275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1054 IncrementalHoareTripleChecker+Valid, 9219 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:33,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3176 Valid, 11943 Invalid, 10275 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1054 Valid, 9219 Invalid, 2 Unknown, 0 Unchecked, 37.6s Time] [2022-11-16 12:17:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14481 states. [2022-11-16 12:17:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14481 to 8524. [2022-11-16 12:17:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8524 states, 6417 states have (on average 1.287050023375409) internal successors, (8259), 6521 states have internal predecessors, (8259), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2022-11-16 12:17:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8524 states to 8524 states and 11197 transitions. [2022-11-16 12:17:34,875 INFO L78 Accepts]: Start accepts. Automaton has 8524 states and 11197 transitions. Word has length 139 [2022-11-16 12:17:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:34,876 INFO L495 AbstractCegarLoop]: Abstraction has 8524 states and 11197 transitions. [2022-11-16 12:17:34,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 9 states have internal predecessors, (97), 4 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 12:17:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 8524 states and 11197 transitions. [2022-11-16 12:17:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-16 12:17:34,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:34,897 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:34,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:17:34,898 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 10389512, now seen corresponding path program 1 times [2022-11-16 12:17:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:34,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327404859] [2022-11-16 12:17:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:17:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:17:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:17:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:17:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:17:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-16 12:17:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:17:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:17:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:17:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-16 12:17:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:17:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 12:17:35,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:35,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327404859] [2022-11-16 12:17:35,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327404859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:35,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:35,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:17:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640799670] [2022-11-16 12:17:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:17:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:17:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:17:35,471 INFO L87 Difference]: Start difference. First operand 8524 states and 11197 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 12:17:36,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:39,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:41,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:45,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:47,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:52,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:54,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:56,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:17:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:57,116 INFO L93 Difference]: Finished difference Result 21044 states and 29223 transitions. [2022-11-16 12:17:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:17:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 152 [2022-11-16 12:17:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:57,196 INFO L225 Difference]: With dead ends: 21044 [2022-11-16 12:17:57,196 INFO L226 Difference]: Without dead ends: 13164 [2022-11-16 12:17:57,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:17:57,226 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 1460 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 821 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 3113 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:57,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 3113 Invalid, 3276 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [821 Valid, 2454 Invalid, 1 Unknown, 0 Unchecked, 19.3s Time] [2022-11-16 12:17:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2022-11-16 12:17:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 8536. [2022-11-16 12:17:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8536 states, 6429 states have (on average 1.2865142323845078) internal successors, (8271), 6533 states have internal predecessors, (8271), 1414 states have call successors, (1414), 669 states have call predecessors, (1414), 692 states have return successors, (1524), 1405 states have call predecessors, (1524), 1413 states have call successors, (1524) [2022-11-16 12:17:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8536 states to 8536 states and 11209 transitions. [2022-11-16 12:17:59,234 INFO L78 Accepts]: Start accepts. Automaton has 8536 states and 11209 transitions. Word has length 152 [2022-11-16 12:17:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:59,235 INFO L495 AbstractCegarLoop]: Abstraction has 8536 states and 11209 transitions. [2022-11-16 12:17:59,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 12:17:59,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8536 states and 11209 transitions. [2022-11-16 12:17:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-16 12:17:59,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:59,267 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:59,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:17:59,268 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2074959600, now seen corresponding path program 1 times [2022-11-16 12:17:59,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:59,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932750666] [2022-11-16 12:17:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:18:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:18:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:18:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:18:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:18:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:18:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:02,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:18:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:03,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:18:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:03,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-16 12:18:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:03,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:18:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:03,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-16 12:18:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:18:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:18:03,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932750666] [2022-11-16 12:18:03,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932750666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041612239] [2022-11-16 12:18:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:03,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:03,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:03,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:03,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:18:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 12:18:04,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:18:05,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-16 12:18:07,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041612239] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:07,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:18:07,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [19, 16] total 29 [2022-11-16 12:18:07,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177836183] [2022-11-16 12:18:07,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:07,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:18:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:18:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:18:07,067 INFO L87 Difference]: Start difference. First operand 8536 states and 11209 transitions. Second operand has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-16 12:18:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:20,899 INFO L93 Difference]: Finished difference Result 20667 states and 27210 transitions. [2022-11-16 12:18:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:18:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 157 [2022-11-16 12:18:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:20,960 INFO L225 Difference]: With dead ends: 20667 [2022-11-16 12:18:20,961 INFO L226 Difference]: Without dead ends: 12222 [2022-11-16 12:18:20,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:18:20,987 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 2417 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2471 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 4178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:20,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2471 Valid, 2860 Invalid, 4178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [627 Valid, 3551 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-16 12:18:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12222 states. [2022-11-16 12:18:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12222 to 12186. [2022-11-16 12:18:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12186 states, 9179 states have (on average 1.2889203616951737) internal successors, (11831), 9328 states have internal predecessors, (11831), 2026 states have call successors, (2026), 951 states have call predecessors, (2026), 980 states have return successors, (2184), 2011 states have call predecessors, (2184), 2025 states have call successors, (2184) [2022-11-16 12:18:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12186 states to 12186 states and 16041 transitions. [2022-11-16 12:18:23,642 INFO L78 Accepts]: Start accepts. Automaton has 12186 states and 16041 transitions. Word has length 157 [2022-11-16 12:18:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:23,643 INFO L495 AbstractCegarLoop]: Abstraction has 12186 states and 16041 transitions. [2022-11-16 12:18:23,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 9 states have internal predecessors, (107), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-16 12:18:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12186 states and 16041 transitions. [2022-11-16 12:18:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-16 12:18:23,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:23,668 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:23,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 12:18:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:23,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:23,887 INFO L85 PathProgramCache]: Analyzing trace with hash 23234702, now seen corresponding path program 1 times [2022-11-16 12:18:23,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:23,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246595468] [2022-11-16 12:18:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:18:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:18:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:18:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:18:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:18:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:18:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:18:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:18:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:18:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:18:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-16 12:18:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:18:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 12:18:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246595468] [2022-11-16 12:18:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246595468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430140629] [2022-11-16 12:18:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:24,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:24,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:24,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:24,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:18:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:25,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:18:25,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:18:26,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:18:26,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430140629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:26,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:18:26,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2022-11-16 12:18:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337444116] [2022-11-16 12:18:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:18:26,106 INFO L87 Difference]: Start difference. First operand 12186 states and 16041 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 12:18:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:29,229 INFO L93 Difference]: Finished difference Result 30043 states and 39592 transitions. [2022-11-16 12:18:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 162 [2022-11-16 12:18:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:29,334 INFO L225 Difference]: With dead ends: 30043 [2022-11-16 12:18:29,334 INFO L226 Difference]: Without dead ends: 17875 [2022-11-16 12:18:29,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:18:29,371 INFO L413 NwaCegarLoop]: 1315 mSDtfsCounter, 760 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:29,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 2051 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17875 states. [2022-11-16 12:18:32,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17875 to 17233. [2022-11-16 12:18:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17233 states, 13040 states have (on average 1.3024539877300614) internal successors, (16984), 13254 states have internal predecessors, (16984), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1418 states have return successors, (3002), 2768 states have call predecessors, (3002), 2773 states have call successors, (3002) [2022-11-16 12:18:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17233 states to 17233 states and 22760 transitions. [2022-11-16 12:18:32,669 INFO L78 Accepts]: Start accepts. Automaton has 17233 states and 22760 transitions. Word has length 162 [2022-11-16 12:18:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:32,670 INFO L495 AbstractCegarLoop]: Abstraction has 17233 states and 22760 transitions. [2022-11-16 12:18:32,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 12:18:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 17233 states and 22760 transitions. [2022-11-16 12:18:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-16 12:18:32,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:32,698 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:32,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:18:32,908 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1976683420, now seen corresponding path program 1 times [2022-11-16 12:18:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:32,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493174032] [2022-11-16 12:18:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:18:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:18:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:18:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:18:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:18:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:18:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:18:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:18:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:18:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:18:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:18:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-16 12:18:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-16 12:18:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:18:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-16 12:18:33,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:33,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493174032] [2022-11-16 12:18:33,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493174032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:33,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:33,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:18:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866966793] [2022-11-16 12:18:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:18:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:18:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:18:33,499 INFO L87 Difference]: Start difference. First operand 17233 states and 22760 transitions. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (16), 7 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 12:18:37,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:18:38,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:18:41,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:18:43,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:18:46,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:18:54,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:18:55,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:18:57,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:04,967 INFO L93 Difference]: Finished difference Result 54855 states and 76393 transitions. [2022-11-16 12:19:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:19:04,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (16), 7 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 182 [2022-11-16 12:19:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:05,163 INFO L225 Difference]: With dead ends: 54855 [2022-11-16 12:19:05,164 INFO L226 Difference]: Without dead ends: 37640 [2022-11-16 12:19:05,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:19:05,219 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 2087 mSDsluCounter, 2879 mSDsCounter, 0 mSdLazyCounter, 4082 mSolverCounterSat, 1327 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2153 SdHoareTripleChecker+Valid, 3836 SdHoareTripleChecker+Invalid, 5410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1327 IncrementalHoareTripleChecker+Valid, 4082 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:05,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2153 Valid, 3836 Invalid, 5410 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1327 Valid, 4082 Invalid, 1 Unknown, 0 Unchecked, 23.9s Time] [2022-11-16 12:19:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37640 states. [2022-11-16 12:19:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37640 to 17291. [2022-11-16 12:19:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17291 states, 13098 states have (on average 1.30111467399603) internal successors, (17042), 13312 states have internal predecessors, (17042), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1418 states have return successors, (3002), 2768 states have call predecessors, (3002), 2773 states have call successors, (3002) [2022-11-16 12:19:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17291 states to 17291 states and 22818 transitions. [2022-11-16 12:19:09,554 INFO L78 Accepts]: Start accepts. Automaton has 17291 states and 22818 transitions. Word has length 182 [2022-11-16 12:19:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:09,555 INFO L495 AbstractCegarLoop]: Abstraction has 17291 states and 22818 transitions. [2022-11-16 12:19:09,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (16), 7 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 12:19:09,556 INFO L276 IsEmpty]: Start isEmpty. Operand 17291 states and 22818 transitions. [2022-11-16 12:19:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-16 12:19:09,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:09,576 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:19:09,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1175836332, now seen corresponding path program 1 times [2022-11-16 12:19:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:09,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58166727] [2022-11-16 12:19:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:19:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:19:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:19:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:19:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:19:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:19:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:19:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:19:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:19:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-16 12:19:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:19:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-16 12:19:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-16 12:19:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-16 12:19:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:19:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:19:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-16 12:19:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-16 12:19:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 12:19:11,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58166727] [2022-11-16 12:19:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58166727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:11,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:19:11,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:19:11,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380080987] [2022-11-16 12:19:11,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:11,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:19:11,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:11,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:19:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:19:11,336 INFO L87 Difference]: Start difference. First operand 17291 states and 22818 transitions. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:19:15,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:17,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:19,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:24,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:26,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:27,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:30,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:32,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:33,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:35,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:38,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:40,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:41,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:46,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:47,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:51,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:52,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:19:54,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:20:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:00,488 INFO L93 Difference]: Finished difference Result 54265 states and 77076 transitions. [2022-11-16 12:20:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:20:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 190 [2022-11-16 12:20:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:00,633 INFO L225 Difference]: With dead ends: 54265 [2022-11-16 12:20:00,634 INFO L226 Difference]: Without dead ends: 37236 [2022-11-16 12:20:00,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:20:00,683 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1607 mSDsluCounter, 8035 mSDsCounter, 0 mSdLazyCounter, 7299 mSolverCounterSat, 686 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 9149 SdHoareTripleChecker+Invalid, 7986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 7299 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:00,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1753 Valid, 9149 Invalid, 7986 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [686 Valid, 7299 Invalid, 1 Unknown, 0 Unchecked, 40.0s Time] [2022-11-16 12:20:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37236 states. [2022-11-16 12:20:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37236 to 17381. [2022-11-16 12:20:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17381 states, 13173 states have (on average 1.2994002884688378) internal successors, (17117), 13387 states have internal predecessors, (17117), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1433 states have return successors, (3032), 2783 states have call predecessors, (3032), 2773 states have call successors, (3032) [2022-11-16 12:20:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17381 states to 17381 states and 22923 transitions. [2022-11-16 12:20:05,244 INFO L78 Accepts]: Start accepts. Automaton has 17381 states and 22923 transitions. Word has length 190 [2022-11-16 12:20:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:05,245 INFO L495 AbstractCegarLoop]: Abstraction has 17381 states and 22923 transitions. [2022-11-16 12:20:05,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:20:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 17381 states and 22923 transitions. [2022-11-16 12:20:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-16 12:20:05,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:05,267 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:05,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:20:05,268 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1178033111, now seen corresponding path program 1 times [2022-11-16 12:20:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:05,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759559565] [2022-11-16 12:20:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:20:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:20:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:20:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:20:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:20:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:20:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:20:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-16 12:20:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-16 12:20:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-16 12:20:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-16 12:20:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:20:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-16 12:20:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-11-16 12:20:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-16 12:20:06,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:06,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759559565] [2022-11-16 12:20:06,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759559565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:20:06,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190754385] [2022-11-16 12:20:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:06,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:06,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:06,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:06,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:20:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:07,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:20:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 12:20:07,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:07,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190754385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:07,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:20:07,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-16 12:20:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921055605] [2022-11-16 12:20:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:20:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:20:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:20:07,411 INFO L87 Difference]: Start difference. First operand 17381 states and 22923 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:20:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:13,008 INFO L93 Difference]: Finished difference Result 39600 states and 53095 transitions. [2022-11-16 12:20:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:20:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 191 [2022-11-16 12:20:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:13,102 INFO L225 Difference]: With dead ends: 39600 [2022-11-16 12:20:13,102 INFO L226 Difference]: Without dead ends: 22481 [2022-11-16 12:20:13,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:20:13,142 INFO L413 NwaCegarLoop]: 1173 mSDtfsCounter, 222 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:13,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 2075 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:20:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22481 states. [2022-11-16 12:20:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22481 to 17411. [2022-11-16 12:20:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17411 states, 13203 states have (on average 1.298719987881542) internal successors, (17147), 13417 states have internal predecessors, (17147), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1433 states have return successors, (3032), 2783 states have call predecessors, (3032), 2773 states have call successors, (3032) [2022-11-16 12:20:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17411 states to 17411 states and 22953 transitions. [2022-11-16 12:20:18,180 INFO L78 Accepts]: Start accepts. Automaton has 17411 states and 22953 transitions. Word has length 191 [2022-11-16 12:20:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:18,181 INFO L495 AbstractCegarLoop]: Abstraction has 17411 states and 22953 transitions. [2022-11-16 12:20:18,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 12:20:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17411 states and 22953 transitions. [2022-11-16 12:20:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-16 12:20:18,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:18,204 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:18,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:18,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:18,421 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1096572583, now seen corresponding path program 1 times [2022-11-16 12:20:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:18,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101067538] [2022-11-16 12:20:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:18,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:20:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:20:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:20:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:20:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:20:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:20:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:20:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:20:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:20:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-16 12:20:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 12:20:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-16 12:20:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:20:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-16 12:20:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101067538] [2022-11-16 12:20:19,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101067538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:19,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:19,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:20:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099558664] [2022-11-16 12:20:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:19,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:20:19,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:20:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:20:19,154 INFO L87 Difference]: Start difference. First operand 17411 states and 22953 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-16 12:20:20,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:20:24,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:20:32,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:20:34,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:20:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:43,887 INFO L93 Difference]: Finished difference Result 55312 states and 76889 transitions. [2022-11-16 12:20:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:20:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 190 [2022-11-16 12:20:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:44,043 INFO L225 Difference]: With dead ends: 55312 [2022-11-16 12:20:44,043 INFO L226 Difference]: Without dead ends: 37919 [2022-11-16 12:20:44,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:20:44,089 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 2311 mSDsluCounter, 2465 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 1510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2376 SdHoareTripleChecker+Valid, 3416 SdHoareTripleChecker+Invalid, 5259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1510 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:44,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2376 Valid, 3416 Invalid, 5259 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1510 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2022-11-16 12:20:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37919 states. [2022-11-16 12:20:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37919 to 17411. [2022-11-16 12:20:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17411 states, 13203 states have (on average 1.298719987881542) internal successors, (17147), 13417 states have internal predecessors, (17147), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1433 states have return successors, (3032), 2783 states have call predecessors, (3032), 2773 states have call successors, (3032) [2022-11-16 12:20:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17411 states to 17411 states and 22953 transitions. [2022-11-16 12:20:48,953 INFO L78 Accepts]: Start accepts. Automaton has 17411 states and 22953 transitions. Word has length 190 [2022-11-16 12:20:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:48,954 INFO L495 AbstractCegarLoop]: Abstraction has 17411 states and 22953 transitions. [2022-11-16 12:20:48,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-16 12:20:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17411 states and 22953 transitions. [2022-11-16 12:20:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-16 12:20:48,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:48,964 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 12:20:48,965 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash -488337116, now seen corresponding path program 1 times [2022-11-16 12:20:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:48,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710991386] [2022-11-16 12:20:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:48,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:20:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:20:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:20:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:20:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:20:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:20:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:20:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:20:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-16 12:20:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-16 12:20:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-16 12:20:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-16 12:20:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-16 12:20:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-16 12:20:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-16 12:20:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-16 12:20:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-11-16 12:20:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:20:50,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:50,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710991386] [2022-11-16 12:20:50,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710991386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:50,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:50,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 12:20:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446845966] [2022-11-16 12:20:50,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:20:50,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:20:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:20:50,488 INFO L87 Difference]: Start difference. First operand 17411 states and 22953 transitions. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 12:20:53,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:20:58,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:21:06,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:21:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:12,119 INFO L93 Difference]: Finished difference Result 43930 states and 61140 transitions. [2022-11-16 12:21:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:21:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 199 [2022-11-16 12:21:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:12,232 INFO L225 Difference]: With dead ends: 43930 [2022-11-16 12:21:12,232 INFO L226 Difference]: Without dead ends: 26781 [2022-11-16 12:21:12,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:21:12,268 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 1475 mSDsluCounter, 4225 mSDsCounter, 0 mSdLazyCounter, 4982 mSolverCounterSat, 823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 4954 SdHoareTripleChecker+Invalid, 5805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 823 IncrementalHoareTripleChecker+Valid, 4982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:12,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 4954 Invalid, 5805 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [823 Valid, 4982 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-16 12:21:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26781 states. [2022-11-16 12:21:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26781 to 17486. [2022-11-16 12:21:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17486 states, 13263 states have (on average 1.297368619467692) internal successors, (17207), 13462 states have internal predecessors, (17207), 2774 states have call successors, (2774), 1369 states have call predecessors, (2774), 1448 states have return successors, (3047), 2813 states have call predecessors, (3047), 2773 states have call successors, (3047) [2022-11-16 12:21:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17486 states to 17486 states and 23028 transitions. [2022-11-16 12:21:17,113 INFO L78 Accepts]: Start accepts. Automaton has 17486 states and 23028 transitions. Word has length 199 [2022-11-16 12:21:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:17,114 INFO L495 AbstractCegarLoop]: Abstraction has 17486 states and 23028 transitions. [2022-11-16 12:21:17,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (22), 8 states have call predecessors, (22), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-16 12:21:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 17486 states and 23028 transitions. [2022-11-16 12:21:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-16 12:21:17,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:17,125 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:17,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 12:21:17,126 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:21:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1300699659, now seen corresponding path program 1 times [2022-11-16 12:21:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:17,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775952286] [2022-11-16 12:21:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:21:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:21:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:19,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:21:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:19,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:21:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:19,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:21:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:19,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:21:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:19,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:21:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:21:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:21:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:21:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-16 12:21:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:21:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:21:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:21:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:21:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-16 12:21:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:21:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:21:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-16 12:21:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-11-16 12:21:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:20,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-11-16 12:21:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:21,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-16 12:21:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 12:21:21,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775952286] [2022-11-16 12:21:21,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775952286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159357808] [2022-11-16 12:21:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:21,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:21,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:21,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:21:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:23,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 12:21:23,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-16 12:21:24,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:21:24,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159357808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:24,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:21:24,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 28 [2022-11-16 12:21:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356059586] [2022-11-16 12:21:24,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:24,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:21:24,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:21:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:21:24,695 INFO L87 Difference]: Start difference. First operand 17486 states and 23028 transitions. Second operand has 11 states, 10 states have (on average 13.2) internal successors, (132), 9 states have internal predecessors, (132), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-16 12:21:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:55,452 INFO L93 Difference]: Finished difference Result 55206 states and 74515 transitions. [2022-11-16 12:21:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:21:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 9 states have internal predecessors, (132), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 205 [2022-11-16 12:21:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:55,642 INFO L225 Difference]: With dead ends: 55206 [2022-11-16 12:21:55,643 INFO L226 Difference]: Without dead ends: 36986 [2022-11-16 12:21:55,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:21:55,705 INFO L413 NwaCegarLoop]: 932 mSDtfsCounter, 2924 mSDsluCounter, 5561 mSDsCounter, 0 mSdLazyCounter, 10764 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3077 SdHoareTripleChecker+Valid, 6493 SdHoareTripleChecker+Invalid, 11905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 10764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:55,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3077 Valid, 6493 Invalid, 11905 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1141 Valid, 10764 Invalid, 0 Unknown, 0 Unchecked, 18.7s Time] [2022-11-16 12:21:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36986 states. [2022-11-16 12:22:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36986 to 20640. [2022-11-16 12:22:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20640 states, 15684 states have (on average 1.29265493496557) internal successors, (20274), 15897 states have internal predecessors, (20274), 3246 states have call successors, (3246), 1637 states have call predecessors, (3246), 1709 states have return successors, (3532), 3280 states have call predecessors, (3532), 3245 states have call successors, (3532) [2022-11-16 12:22:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20640 states to 20640 states and 27052 transitions. [2022-11-16 12:22:01,380 INFO L78 Accepts]: Start accepts. Automaton has 20640 states and 27052 transitions. Word has length 205 [2022-11-16 12:22:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:22:01,380 INFO L495 AbstractCegarLoop]: Abstraction has 20640 states and 27052 transitions. [2022-11-16 12:22:01,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 13.2) internal successors, (132), 9 states have internal predecessors, (132), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-16 12:22:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20640 states and 27052 transitions. [2022-11-16 12:22:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-16 12:22:01,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:22:01,391 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:01,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:01,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:22:01,593 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:22:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1684241477, now seen corresponding path program 1 times [2022-11-16 12:22:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:01,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468503406] [2022-11-16 12:22:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:22:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:22:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:22:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:22:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:22:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:22:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:22:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:22:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:22:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:22:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:22:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:22:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-16 12:22:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 12:22:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-16 12:22:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-16 12:22:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-11-16 12:22:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-16 12:22:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-16 12:22:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:01,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-11-16 12:22:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:02,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-11-16 12:22:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:02,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:22:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:22:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468503406] [2022-11-16 12:22:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468503406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:22:02,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:22:02,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:22:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702993284] [2022-11-16 12:22:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:22:02,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:22:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:22:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:22:02,049 INFO L87 Difference]: Start difference. First operand 20640 states and 27052 transitions. Second operand has 10 states, 10 states have (on average 14.1) internal successors, (141), 3 states have internal predecessors, (141), 2 states have call successors, (23), 9 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-16 12:22:09,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:22:12,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:22:17,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:22:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:22:26,241 INFO L93 Difference]: Finished difference Result 47765 states and 65718 transitions. [2022-11-16 12:22:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:22:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 3 states have internal predecessors, (141), 2 states have call successors, (23), 9 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 232 [2022-11-16 12:22:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:22:26,351 INFO L225 Difference]: With dead ends: 47765 [2022-11-16 12:22:26,352 INFO L226 Difference]: Without dead ends: 27143 [2022-11-16 12:22:26,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:22:26,393 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 908 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 3276 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 3841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 3276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:22:26,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 3017 Invalid, 3841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 3276 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2022-11-16 12:22:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27143 states. [2022-11-16 12:22:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27143 to 20677. [2022-11-16 12:22:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20677 states, 15721 states have (on average 1.2919661599134915) internal successors, (20311), 15934 states have internal predecessors, (20311), 3246 states have call successors, (3246), 1637 states have call predecessors, (3246), 1709 states have return successors, (3532), 3280 states have call predecessors, (3532), 3245 states have call successors, (3532) [2022-11-16 12:22:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20677 states to 20677 states and 27089 transitions. [2022-11-16 12:22:31,101 INFO L78 Accepts]: Start accepts. Automaton has 20677 states and 27089 transitions. Word has length 232 [2022-11-16 12:22:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:22:31,101 INFO L495 AbstractCegarLoop]: Abstraction has 20677 states and 27089 transitions. [2022-11-16 12:22:31,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 3 states have internal predecessors, (141), 2 states have call successors, (23), 9 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-16 12:22:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 20677 states and 27089 transitions. [2022-11-16 12:22:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-16 12:22:31,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:22:31,113 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:31,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 12:22:31,113 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:22:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:31,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1416624415, now seen corresponding path program 1 times [2022-11-16 12:22:31,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:31,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453010804] [2022-11-16 12:22:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:31,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:22:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:22:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:22:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:22:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:22:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:22:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:22:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:22:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:22:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:22:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:22:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:22:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-16 12:22:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-16 12:22:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-16 12:22:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-16 12:22:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-11-16 12:22:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-11-16 12:22:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-11-16 12:22:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-11-16 12:22:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-11-16 12:22:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:22:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:22:31,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:31,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453010804] [2022-11-16 12:22:31,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453010804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:22:31,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416387652] [2022-11-16 12:22:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:31,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:22:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:22:31,656 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:22:31,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:22:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:32,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 2415 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:22:32,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:22:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 12:22:32,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:22:32,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416387652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:22:32,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:22:32,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-16 12:22:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898635016] [2022-11-16 12:22:32,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:22:32,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:22:32,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:22:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:22:32,889 INFO L87 Difference]: Start difference. First operand 20677 states and 27089 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 4 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-16 12:22:33,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:22:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:22:38,698 INFO L93 Difference]: Finished difference Result 38681 states and 50668 transitions. [2022-11-16 12:22:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:22:38,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 4 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 234 [2022-11-16 12:22:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:22:38,763 INFO L225 Difference]: With dead ends: 38681 [2022-11-16 12:22:38,763 INFO L226 Difference]: Without dead ends: 18086 [2022-11-16 12:22:38,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:22:38,803 INFO L413 NwaCegarLoop]: 1017 mSDtfsCounter, 1429 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:22:38,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 1232 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:22:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18086 states. [2022-11-16 12:22:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18086 to 18057. [2022-11-16 12:22:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18057 states, 13897 states have (on average 1.2933007123839677) internal successors, (17973), 14064 states have internal predecessors, (17973), 2707 states have call successors, (2707), 1395 states have call predecessors, (2707), 1452 states have return successors, (2926), 2734 states have call predecessors, (2926), 2706 states have call successors, (2926) [2022-11-16 12:22:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18057 states to 18057 states and 23606 transitions. [2022-11-16 12:22:42,881 INFO L78 Accepts]: Start accepts. Automaton has 18057 states and 23606 transitions. Word has length 234 [2022-11-16 12:22:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:22:42,882 INFO L495 AbstractCegarLoop]: Abstraction has 18057 states and 23606 transitions. [2022-11-16 12:22:42,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 4 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-16 12:22:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18057 states and 23606 transitions. [2022-11-16 12:22:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-16 12:22:42,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:22:42,901 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:22:42,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:22:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:22:43,113 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:22:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:22:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash -852946903, now seen corresponding path program 1 times [2022-11-16 12:22:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:22:43,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353087789] [2022-11-16 12:22:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:22:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:22:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:22:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:22:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:22:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:22:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:22:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:22:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:22:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:22:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:22:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:22:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:22:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:22:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:22:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-16 12:22:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:22:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:22:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:22:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-16 12:22:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:22:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:22:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:22:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-11-16 12:22:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:22:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:22:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:44,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:22:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:44,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-11-16 12:22:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:44,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-11-16 12:22:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:22:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-16 12:22:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:22:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353087789] [2022-11-16 12:22:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353087789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:22:44,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:22:44,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 12:22:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372469646] [2022-11-16 12:22:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:22:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:22:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:22:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:22:44,022 INFO L87 Difference]: Start difference. First operand 18057 states and 23606 transitions. Second operand has 13 states, 12 states have (on average 12.75) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (28), 7 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-16 12:22:46,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:00,392 INFO L93 Difference]: Finished difference Result 39473 states and 52912 transitions. [2022-11-16 12:23:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:23:00,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 12.75) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (28), 7 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 249 [2022-11-16 12:23:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:00,456 INFO L225 Difference]: With dead ends: 39473 [2022-11-16 12:23:00,457 INFO L226 Difference]: Without dead ends: 21679 [2022-11-16 12:23:00,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:23:00,488 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 831 mSDsluCounter, 4186 mSDsCounter, 0 mSdLazyCounter, 3570 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 4802 SdHoareTripleChecker+Invalid, 4243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 3570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:00,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 4802 Invalid, 4243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 3570 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-11-16 12:23:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21679 states. [2022-11-16 12:23:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21679 to 18105. [2022-11-16 12:23:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18105 states, 13929 states have (on average 1.292626893531481) internal successors, (18005), 14096 states have internal predecessors, (18005), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-16 12:23:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18105 states to 18105 states and 23670 transitions. [2022-11-16 12:23:04,546 INFO L78 Accepts]: Start accepts. Automaton has 18105 states and 23670 transitions. Word has length 249 [2022-11-16 12:23:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:04,547 INFO L495 AbstractCegarLoop]: Abstraction has 18105 states and 23670 transitions. [2022-11-16 12:23:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 12.75) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (28), 7 states have call predecessors, (28), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-16 12:23:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 18105 states and 23670 transitions. [2022-11-16 12:23:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-16 12:23:04,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:04,560 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:04,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 12:23:04,560 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1240168155, now seen corresponding path program 1 times [2022-11-16 12:23:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430431184] [2022-11-16 12:23:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:23:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:23:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:23:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:23:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:23:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:23:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:23:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:23:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:23:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:23:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-16 12:23:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:04,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:23:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:23:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:23:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-16 12:23:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:23:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:23:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-16 12:23:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:23:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:23:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-11-16 12:23:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-11-16 12:23:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:23:05,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430431184] [2022-11-16 12:23:05,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430431184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:23:05,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:23:05,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:23:05,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715362450] [2022-11-16 12:23:05,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:23:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:23:05,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:05,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:23:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:23:05,082 INFO L87 Difference]: Start difference. First operand 18105 states and 23670 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (28), 7 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 12:23:13,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:14,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:19,338 INFO L93 Difference]: Finished difference Result 39720 states and 53529 transitions. [2022-11-16 12:23:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:23:19,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (28), 7 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 250 [2022-11-16 12:23:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:19,404 INFO L225 Difference]: With dead ends: 39720 [2022-11-16 12:23:19,404 INFO L226 Difference]: Without dead ends: 21633 [2022-11-16 12:23:19,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:23:19,442 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 651 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:19,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 2251 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-16 12:23:19,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21633 states. [2022-11-16 12:23:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21633 to 18138. [2022-11-16 12:23:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18138 states, 13962 states have (on average 1.2919352528291075) internal successors, (18038), 14129 states have internal predecessors, (18038), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-16 12:23:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18138 states to 18138 states and 23703 transitions. [2022-11-16 12:23:23,557 INFO L78 Accepts]: Start accepts. Automaton has 18138 states and 23703 transitions. Word has length 250 [2022-11-16 12:23:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:23,558 INFO L495 AbstractCegarLoop]: Abstraction has 18138 states and 23703 transitions. [2022-11-16 12:23:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (28), 7 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 12:23:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 18138 states and 23703 transitions. [2022-11-16 12:23:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-16 12:23:23,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:23,571 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:23,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 12:23:23,571 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1173492887, now seen corresponding path program 1 times [2022-11-16 12:23:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:23,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665543281] [2022-11-16 12:23:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:23:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:23:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:23:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:23:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:23:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:23:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:23:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:23:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:23:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:23:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:23,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-16 12:23:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:23:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:23:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:23:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-16 12:23:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:23:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:23:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-16 12:23:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:23:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:23:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-16 12:23:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-11-16 12:23:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:23:24,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:24,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665543281] [2022-11-16 12:23:24,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665543281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479509953] [2022-11-16 12:23:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:24,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:24,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:24,106 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:24,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:23:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 2340 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:23:25,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:23:25,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:23:25,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479509953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:25,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:25,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 11 [2022-11-16 12:23:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128739659] [2022-11-16 12:23:25,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:25,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:23:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:23:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:23:25,204 INFO L87 Difference]: Start difference. First operand 18138 states and 23703 transitions. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 6 states have internal predecessors, (169), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 12:23:27,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:33,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:38,585 INFO L93 Difference]: Finished difference Result 39918 states and 53793 transitions. [2022-11-16 12:23:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:23:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 6 states have internal predecessors, (169), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 252 [2022-11-16 12:23:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:38,642 INFO L225 Difference]: With dead ends: 39918 [2022-11-16 12:23:38,642 INFO L226 Difference]: Without dead ends: 21798 [2022-11-16 12:23:38,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:23:38,670 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 492 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:38,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 2159 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-16 12:23:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21798 states. [2022-11-16 12:23:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21798 to 18336. [2022-11-16 12:23:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18336 states, 14160 states have (on average 1.2878531073446329) internal successors, (18236), 14327 states have internal predecessors, (18236), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-16 12:23:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18336 states to 18336 states and 23901 transitions. [2022-11-16 12:23:43,254 INFO L78 Accepts]: Start accepts. Automaton has 18336 states and 23901 transitions. Word has length 252 [2022-11-16 12:23:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:43,254 INFO L495 AbstractCegarLoop]: Abstraction has 18336 states and 23901 transitions. [2022-11-16 12:23:43,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 6 states have internal predecessors, (169), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 12:23:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 18336 states and 23901 transitions. [2022-11-16 12:23:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-11-16 12:23:43,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:43,272 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:43,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:23:43,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:23:43,483 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:23:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash -41815093, now seen corresponding path program 2 times [2022-11-16 12:23:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:43,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823538589] [2022-11-16 12:23:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:43,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:23:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:23:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:23:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:23:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:23:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:23:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:23:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:23:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:23:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:23:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:23:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-16 12:23:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:23:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:23:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:23:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-16 12:23:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:23:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:23:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-16 12:23:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:44,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:23:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:23:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:44,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:23:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:44,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-11-16 12:23:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:44,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-11-16 12:23:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:23:44,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823538589] [2022-11-16 12:23:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823538589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529994016] [2022-11-16 12:23:44,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:23:44,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:44,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:44,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:44,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:23:45,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:23:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:23:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 2385 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:23:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:23:45,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:23:45,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529994016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:45,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:45,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2022-11-16 12:23:45,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064978581] [2022-11-16 12:23:45,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:45,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:23:45,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:23:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:23:45,642 INFO L87 Difference]: Start difference. First operand 18336 states and 23901 transitions. Second operand has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 12 states have internal predecessors, (181), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 12:23:50,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:23:58,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:04,826 INFO L93 Difference]: Finished difference Result 40512 states and 54486 transitions. [2022-11-16 12:24:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:24:04,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 12 states have internal predecessors, (181), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 258 [2022-11-16 12:24:04,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:04,877 INFO L225 Difference]: With dead ends: 40512 [2022-11-16 12:24:04,877 INFO L226 Difference]: Without dead ends: 22194 [2022-11-16 12:24:04,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:24:04,903 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 511 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:04,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 3418 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-11-16 12:24:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22194 states. [2022-11-16 12:24:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22194 to 18732. [2022-11-16 12:24:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18732 states, 14556 states have (on average 1.2800219840615554) internal successors, (18632), 14723 states have internal predecessors, (18632), 2723 states have call successors, (2723), 1395 states have call predecessors, (2723), 1452 states have return successors, (2942), 2750 states have call predecessors, (2942), 2722 states have call successors, (2942) [2022-11-16 12:24:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18732 states to 18732 states and 24297 transitions. [2022-11-16 12:24:09,161 INFO L78 Accepts]: Start accepts. Automaton has 18732 states and 24297 transitions. Word has length 258 [2022-11-16 12:24:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:09,161 INFO L495 AbstractCegarLoop]: Abstraction has 18732 states and 24297 transitions. [2022-11-16 12:24:09,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 12 states have internal predecessors, (181), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 12:24:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 18732 states and 24297 transitions. [2022-11-16 12:24:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-16 12:24:09,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:09,175 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:24:09,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:24:09,392 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1373667663, now seen corresponding path program 1 times [2022-11-16 12:24:09,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156958965] [2022-11-16 12:24:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:09,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:24:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:24:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:24:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:24:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:24:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:24:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:24:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-16 12:24:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:24:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-16 12:24:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-16 12:24:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:24:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-16 12:24:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-11-16 12:24:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:09,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:24:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:24:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:24:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:24:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:24:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:24:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:24:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-11-16 12:24:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 12:24:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156958965] [2022-11-16 12:24:10,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156958965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685233191] [2022-11-16 12:24:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:10,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:10,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:24:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:24:11,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 12:24:11,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:24:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 12:24:11,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685233191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:24:11,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:24:11,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 15 [2022-11-16 12:24:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424968076] [2022-11-16 12:24:11,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:24:11,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:24:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:24:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:24:11,433 INFO L87 Difference]: Start difference. First operand 18732 states and 24297 transitions. Second operand has 15 states, 15 states have (on average 16.733333333333334) internal successors, (251), 7 states have internal predecessors, (251), 5 states have call successors, (65), 10 states have call predecessors, (65), 2 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) [2022-11-16 12:24:14,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:29,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:30,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:32,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:24:45,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:45,082 INFO L93 Difference]: Finished difference Result 67069 states and 96082 transitions. [2022-11-16 12:24:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:24:45,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 16.733333333333334) internal successors, (251), 7 states have internal predecessors, (251), 5 states have call successors, (65), 10 states have call predecessors, (65), 2 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) Word has length 265 [2022-11-16 12:24:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:45,197 INFO L225 Difference]: With dead ends: 67069 [2022-11-16 12:24:45,197 INFO L226 Difference]: Without dead ends: 48619 [2022-11-16 12:24:45,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:24:45,227 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 3251 mSDsluCounter, 3659 mSDsCounter, 0 mSdLazyCounter, 5819 mSolverCounterSat, 1870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3552 SdHoareTripleChecker+Valid, 4516 SdHoareTripleChecker+Invalid, 7689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1870 IncrementalHoareTripleChecker+Valid, 5819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:45,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3552 Valid, 4516 Invalid, 7689 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1870 Valid, 5819 Invalid, 0 Unknown, 0 Unchecked, 21.7s Time] [2022-11-16 12:24:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48619 states. [2022-11-16 12:24:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48619 to 19416. [2022-11-16 12:24:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19416 states, 15028 states have (on average 1.273356401384083) internal successors, (19136), 15175 states have internal predecessors, (19136), 2935 states have call successors, (2935), 1395 states have call predecessors, (2935), 1452 states have return successors, (3258), 2982 states have call predecessors, (3258), 2934 states have call successors, (3258) [2022-11-16 12:24:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19416 states to 19416 states and 25329 transitions. [2022-11-16 12:24:50,131 INFO L78 Accepts]: Start accepts. Automaton has 19416 states and 25329 transitions. Word has length 265 [2022-11-16 12:24:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:50,131 INFO L495 AbstractCegarLoop]: Abstraction has 19416 states and 25329 transitions. [2022-11-16 12:24:50,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.733333333333334) internal successors, (251), 7 states have internal predecessors, (251), 5 states have call successors, (65), 10 states have call predecessors, (65), 2 states have return successors, (52), 5 states have call predecessors, (52), 5 states have call successors, (52) [2022-11-16 12:24:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 19416 states and 25329 transitions. [2022-11-16 12:24:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-11-16 12:24:50,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:50,144 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:24:50,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:50,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:50,345 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:24:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1738441960, now seen corresponding path program 1 times [2022-11-16 12:24:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907154809] [2022-11-16 12:24:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:24:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:24:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:24:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:24:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:24:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:24:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:24:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-16 12:24:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:24:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-16 12:24:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-16 12:24:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-16 12:24:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:24:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-11-16 12:24:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-11-16 12:24:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-11-16 12:24:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-11-16 12:24:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-11-16 12:24:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:24:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:24:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:24:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-16 12:24:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907154809] [2022-11-16 12:24:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907154809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609462685] [2022-11-16 12:24:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:50,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:50,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:50,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:50,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:24:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2491 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:24:51,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 12:24:51,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:24:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-16 12:24:51,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609462685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:24:51,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:24:51,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 14 [2022-11-16 12:24:51,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005592664] [2022-11-16 12:24:51,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:24:51,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:24:51,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:24:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:24:51,967 INFO L87 Difference]: Start difference. First operand 19416 states and 25329 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 12:24:54,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:01,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:25:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:25:07,928 INFO L93 Difference]: Finished difference Result 44214 states and 60473 transitions. [2022-11-16 12:25:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:25:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 258 [2022-11-16 12:25:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:25:07,989 INFO L225 Difference]: With dead ends: 44214 [2022-11-16 12:25:07,989 INFO L226 Difference]: Without dead ends: 24816 [2022-11-16 12:25:08,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:25:08,019 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 1638 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 1107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 3226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1107 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:25:08,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 2164 Invalid, 3226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1107 Valid, 2119 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-16 12:25:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24816 states. [2022-11-16 12:25:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24816 to 19626. [2022-11-16 12:25:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19626 states, 15238 states have (on average 1.269589184932406) internal successors, (19346), 15385 states have internal predecessors, (19346), 2935 states have call successors, (2935), 1395 states have call predecessors, (2935), 1452 states have return successors, (3258), 2982 states have call predecessors, (3258), 2934 states have call successors, (3258) [2022-11-16 12:25:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19626 states to 19626 states and 25539 transitions. [2022-11-16 12:25:12,576 INFO L78 Accepts]: Start accepts. Automaton has 19626 states and 25539 transitions. Word has length 258 [2022-11-16 12:25:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:25:12,577 INFO L495 AbstractCegarLoop]: Abstraction has 19626 states and 25539 transitions. [2022-11-16 12:25:12,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 7 states have internal predecessors, (202), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 12:25:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 19626 states and 25539 transitions. [2022-11-16 12:25:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-16 12:25:12,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:25:12,589 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:25:12,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:25:12,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 12:25:12,790 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:25:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:25:12,791 INFO L85 PathProgramCache]: Analyzing trace with hash -796445228, now seen corresponding path program 2 times [2022-11-16 12:25:12,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:25:12,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460628642] [2022-11-16 12:25:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:25:12,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:25:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:25:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:25:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:25:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:25:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:25:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:25:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:25:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-16 12:25:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:25:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-16 12:25:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-16 12:25:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-16 12:25:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:25:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-11-16 12:25:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-11-16 12:25:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-11-16 12:25:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-11-16 12:25:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-11-16 12:25:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:25:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 74 proven. 16 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-16 12:25:13,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:25:13,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460628642] [2022-11-16 12:25:13,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460628642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:25:13,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610798654] [2022-11-16 12:25:13,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:25:13,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:13,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:25:13,298 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:25:13,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:25:14,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:25:14,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:25:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:25:14,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:25:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 96 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 12:25:14,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:25:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 74 proven. 16 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-16 12:25:14,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610798654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:25:14,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:25:14,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 20 [2022-11-16 12:25:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064305139] [2022-11-16 12:25:14,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:25:14,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:25:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:25:14,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:25:14,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:25:14,943 INFO L87 Difference]: Start difference. First operand 19626 states and 25539 transitions. Second operand has 20 states, 20 states have (on average 10.7) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 12:25:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:25:33,806 INFO L93 Difference]: Finished difference Result 44844 states and 61208 transitions. [2022-11-16 12:25:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:25:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.7) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 264 [2022-11-16 12:25:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:25:33,881 INFO L225 Difference]: With dead ends: 44844 [2022-11-16 12:25:33,881 INFO L226 Difference]: Without dead ends: 25236 [2022-11-16 12:25:33,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:25:33,916 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 1604 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:25:33,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2845 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2022-11-16 12:25:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25236 states. [2022-11-16 12:25:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25236 to 20046. [2022-11-16 12:25:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20046 states, 15658 states have (on average 1.2623579001149572) internal successors, (19766), 15805 states have internal predecessors, (19766), 2935 states have call successors, (2935), 1395 states have call predecessors, (2935), 1452 states have return successors, (3258), 2982 states have call predecessors, (3258), 2934 states have call successors, (3258) [2022-11-16 12:25:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20046 states to 20046 states and 25959 transitions. [2022-11-16 12:25:40,132 INFO L78 Accepts]: Start accepts. Automaton has 20046 states and 25959 transitions. Word has length 264 [2022-11-16 12:25:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:25:40,132 INFO L495 AbstractCegarLoop]: Abstraction has 20046 states and 25959 transitions. [2022-11-16 12:25:40,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.7) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (49), 9 states have call predecessors, (49), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-16 12:25:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 20046 states and 25959 transitions. [2022-11-16 12:25:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-16 12:25:40,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:25:40,143 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:25:40,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:25:40,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 12:25:40,344 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:25:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:25:40,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1216957747, now seen corresponding path program 3 times [2022-11-16 12:25:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:25:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926076400] [2022-11-16 12:25:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:25:40,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:25:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:25:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:25:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:25:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:25:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:25:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:25:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:25:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:25:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:25:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:25:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-16 12:25:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:25:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:25:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:25:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-16 12:25:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:25:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:25:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-16 12:25:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:25:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:25:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-11-16 12:25:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-11-16 12:25:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:25:41,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:25:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926076400] [2022-11-16 12:25:41,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926076400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:25:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599193967] [2022-11-16 12:25:41,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:25:41,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:41,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:25:41,320 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:25:41,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:25:43,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:25:43,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:25:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:25:43,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:25:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-16 12:25:43,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:25:43,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599193967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:25:43,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:25:43,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2022-11-16 12:25:43,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411185033] [2022-11-16 12:25:43,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:25:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:25:43,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:25:43,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:25:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:25:43,055 INFO L87 Difference]: Start difference. First operand 20046 states and 25959 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 12:25:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:25:48,714 INFO L93 Difference]: Finished difference Result 39972 states and 51828 transitions. [2022-11-16 12:25:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:25:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 270 [2022-11-16 12:25:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:25:48,764 INFO L225 Difference]: With dead ends: 39972 [2022-11-16 12:25:48,764 INFO L226 Difference]: Without dead ends: 19944 [2022-11-16 12:25:48,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:25:48,793 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 31 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:25:48,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1670 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:25:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19944 states. [2022-11-16 12:25:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19944 to 19944. [2022-11-16 12:25:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19944 states, 15607 states have (on average 1.2599474594733133) internal successors, (19664), 15754 states have internal predecessors, (19664), 2884 states have call successors, (2884), 1395 states have call predecessors, (2884), 1452 states have return successors, (3207), 2931 states have call predecessors, (3207), 2883 states have call successors, (3207) [2022-11-16 12:25:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19944 states to 19944 states and 25755 transitions. [2022-11-16 12:25:55,388 INFO L78 Accepts]: Start accepts. Automaton has 19944 states and 25755 transitions. Word has length 270 [2022-11-16 12:25:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:25:55,388 INFO L495 AbstractCegarLoop]: Abstraction has 19944 states and 25755 transitions. [2022-11-16 12:25:55,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-16 12:25:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 19944 states and 25755 transitions. [2022-11-16 12:25:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-16 12:25:55,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:25:55,400 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:25:55,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 12:25:55,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:55,600 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:25:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:25:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash 78646003, now seen corresponding path program 1 times [2022-11-16 12:25:55,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:25:55,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30483893] [2022-11-16 12:25:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:25:55,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:25:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:25:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:25:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:25:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:25:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:25:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:25:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:25:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:25:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:25:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-16 12:25:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-16 12:25:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:25:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:25:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:25:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-16 12:25:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:25:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:25:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-11-16 12:25:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:25:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:25:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:25:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-11-16 12:25:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-11-16 12:25:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:25:56,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:25:56,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30483893] [2022-11-16 12:25:56,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30483893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:25:56,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795842608] [2022-11-16 12:25:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:25:56,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:56,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:25:56,436 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:25:56,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:25:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 2475 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:25:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:25:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:25:57,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:25:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:25:57,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795842608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:25:57,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:25:57,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 27 [2022-11-16 12:25:57,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692680825] [2022-11-16 12:25:57,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:25:57,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:25:57,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:25:57,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:25:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:25:57,957 INFO L87 Difference]: Start difference. First operand 19944 states and 25755 transitions. Second operand has 27 states, 27 states have (on average 7.518518518518518) internal successors, (203), 22 states have internal predecessors, (203), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 12:26:01,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:08,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:15,330 INFO L93 Difference]: Finished difference Result 43992 states and 58671 transitions. [2022-11-16 12:26:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:26:15,331 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.518518518518518) internal successors, (203), 22 states have internal predecessors, (203), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 270 [2022-11-16 12:26:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:15,381 INFO L225 Difference]: With dead ends: 43992 [2022-11-16 12:26:15,381 INFO L226 Difference]: Without dead ends: 24066 [2022-11-16 12:26:15,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 580 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=1523, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:26:15,409 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 792 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 2643 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 3887 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 2643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:15,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 3887 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 2643 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-16 12:26:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24066 states. [2022-11-16 12:26:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24066 to 20604. [2022-11-16 12:26:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20604 states, 16267 states have (on average 1.2494006270363311) internal successors, (20324), 16414 states have internal predecessors, (20324), 2884 states have call successors, (2884), 1395 states have call predecessors, (2884), 1452 states have return successors, (3207), 2931 states have call predecessors, (3207), 2883 states have call successors, (3207) [2022-11-16 12:26:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20604 states to 20604 states and 26415 transitions. [2022-11-16 12:26:20,968 INFO L78 Accepts]: Start accepts. Automaton has 20604 states and 26415 transitions. Word has length 270 [2022-11-16 12:26:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:20,968 INFO L495 AbstractCegarLoop]: Abstraction has 20604 states and 26415 transitions. [2022-11-16 12:26:20,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.518518518518518) internal successors, (203), 22 states have internal predecessors, (203), 2 states have call successors, (40), 7 states have call predecessors, (40), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 12:26:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 20604 states and 26415 transitions. [2022-11-16 12:26:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-16 12:26:20,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:20,980 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:20,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:21,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:26:21,181 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:26:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:21,182 INFO L85 PathProgramCache]: Analyzing trace with hash 982856876, now seen corresponding path program 3 times [2022-11-16 12:26:21,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:21,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092944436] [2022-11-16 12:26:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:26:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:26:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:26:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:26:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:26:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:26:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:26:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:26:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-16 12:26:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:26:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-16 12:26:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-16 12:26:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-16 12:26:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:26:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-11-16 12:26:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-11-16 12:26:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-11-16 12:26:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-11-16 12:26:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:22,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-11-16 12:26:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:26:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:22,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:26:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:22,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:26:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-16 12:26:22,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092944436] [2022-11-16 12:26:22,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092944436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611458640] [2022-11-16 12:26:22,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:26:22,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:22,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:22,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:26:22,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:26:23,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:26:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 12:26:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-11-16 12:26:23,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:23,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611458640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:23,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:26:23,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [20] total 32 [2022-11-16 12:26:23,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333549398] [2022-11-16 12:26:23,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:23,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:26:23,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:23,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:26:23,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:26:24,000 INFO L87 Difference]: Start difference. First operand 20604 states and 26415 transitions. Second operand has 14 states, 13 states have (on average 11.23076923076923) internal successors, (146), 11 states have internal predecessors, (146), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-16 12:26:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:37,159 INFO L93 Difference]: Finished difference Result 54596 states and 72319 transitions. [2022-11-16 12:26:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:26:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 11.23076923076923) internal successors, (146), 11 states have internal predecessors, (146), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) Word has length 276 [2022-11-16 12:26:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:37,231 INFO L225 Difference]: With dead ends: 54596 [2022-11-16 12:26:37,231 INFO L226 Difference]: Without dead ends: 34310 [2022-11-16 12:26:37,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:26:37,264 INFO L413 NwaCegarLoop]: 1807 mSDtfsCounter, 1662 mSDsluCounter, 18606 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 20413 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:37,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1696 Valid, 20413 Invalid, 1592 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [248 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:26:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34310 states. [2022-11-16 12:26:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34310 to 20580. [2022-11-16 12:26:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20580 states, 16243 states have (on average 1.247306532044573) internal successors, (20260), 16390 states have internal predecessors, (20260), 2884 states have call successors, (2884), 1395 states have call predecessors, (2884), 1452 states have return successors, (3207), 2931 states have call predecessors, (3207), 2883 states have call successors, (3207) [2022-11-16 12:26:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20580 states to 20580 states and 26351 transitions. [2022-11-16 12:26:43,489 INFO L78 Accepts]: Start accepts. Automaton has 20580 states and 26351 transitions. Word has length 276 [2022-11-16 12:26:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:43,490 INFO L495 AbstractCegarLoop]: Abstraction has 20580 states and 26351 transitions. [2022-11-16 12:26:43,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 11.23076923076923) internal successors, (146), 11 states have internal predecessors, (146), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-16 12:26:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 20580 states and 26351 transitions. [2022-11-16 12:26:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-16 12:26:43,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:43,506 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:43,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:43,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:43,707 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:26:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 793099357, now seen corresponding path program 1 times [2022-11-16 12:26:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:26:43,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098522890] [2022-11-16 12:26:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:26:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:26:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:26:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:26:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:26:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:26:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:26:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:26:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 12:26:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-16 12:26:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:26:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-16 12:26:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-16 12:26:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-16 12:26:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:26:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-11-16 12:26:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-11-16 12:26:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-11-16 12:26:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-11-16 12:26:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-11-16 12:26:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:26:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:26:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:26:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-11-16 12:26:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:26:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2022-11-16 12:26:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-16 12:26:44,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:26:44,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098522890] [2022-11-16 12:26:44,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098522890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:44,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310721709] [2022-11-16 12:26:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:44,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:26:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:26:44,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:26:44,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:26:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2726 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:26:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 104 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-16 12:26:45,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-16 12:26:46,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310721709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:46,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:26:46,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 31 [2022-11-16 12:26:46,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264313152] [2022-11-16 12:26:46,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:26:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:26:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:26:46,360 INFO L87 Difference]: Start difference. First operand 20580 states and 26351 transitions. Second operand has 31 states, 31 states have (on average 8.193548387096774) internal successors, (254), 23 states have internal predecessors, (254), 2 states have call successors, (58), 10 states have call predecessors, (58), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-16 12:27:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:09,566 INFO L93 Difference]: Finished difference Result 47032 states and 63201 transitions. [2022-11-16 12:27:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:27:09,567 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 8.193548387096774) internal successors, (254), 23 states have internal predecessors, (254), 2 states have call successors, (58), 10 states have call predecessors, (58), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 295 [2022-11-16 12:27:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:09,661 INFO L225 Difference]: With dead ends: 47032 [2022-11-16 12:27:09,661 INFO L226 Difference]: Without dead ends: 26470 [2022-11-16 12:27:09,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 626 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:27:09,701 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1795 mSDsluCounter, 3791 mSDsCounter, 0 mSdLazyCounter, 7075 mSolverCounterSat, 1120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 4189 SdHoareTripleChecker+Invalid, 8195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 7075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:09,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1801 Valid, 4189 Invalid, 8195 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1120 Valid, 7075 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-16 12:27:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26470 states. [2022-11-16 12:27:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26470 to 21280. [2022-11-16 12:27:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21280 states, 16943 states have (on average 1.2370890633299887) internal successors, (20960), 17090 states have internal predecessors, (20960), 2884 states have call successors, (2884), 1395 states have call predecessors, (2884), 1452 states have return successors, (3207), 2931 states have call predecessors, (3207), 2883 states have call successors, (3207) [2022-11-16 12:27:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21280 states to 21280 states and 27051 transitions. [2022-11-16 12:27:16,951 INFO L78 Accepts]: Start accepts. Automaton has 21280 states and 27051 transitions. Word has length 295 [2022-11-16 12:27:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:16,951 INFO L495 AbstractCegarLoop]: Abstraction has 21280 states and 27051 transitions. [2022-11-16 12:27:16,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.193548387096774) internal successors, (254), 23 states have internal predecessors, (254), 2 states have call successors, (58), 10 states have call predecessors, (58), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-16 12:27:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 21280 states and 27051 transitions. [2022-11-16 12:27:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-11-16 12:27:16,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:16,966 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:16,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd895118-9251-4017-95af-45259294d4e8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 12:27:17,167 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:27:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash -19974128, now seen corresponding path program 1 times [2022-11-16 12:27:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:27:17,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111284408] [2022-11-16 12:27:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:17,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:27:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:27:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 12:27:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:27:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 12:27:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:27:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:27:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-16 12:27:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-16 12:27:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-16 12:27:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:27:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:27:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:27:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-16 12:27:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:27:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-16 12:27:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-16 12:27:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-16 12:27:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:27:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-16 12:27:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:27:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-11-16 12:27:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:27:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-16 12:27:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 12:27:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-11-16 12:27:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:27:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:27:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:27:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2022-11-16 12:27:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2022-11-16 12:27:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-11-16 12:27:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:27:18,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111284408] [2022-11-16 12:27:18,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111284408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:18,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:18,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 12:27:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697105515] [2022-11-16 12:27:18,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:27:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:27:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:27:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:27:18,246 INFO L87 Difference]: Start difference. First operand 21280 states and 27051 transitions. Second operand has 11 states, 11 states have (on average 15.0) internal successors, (165), 5 states have internal predecessors, (165), 3 states have call successors, (31), 8 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30)